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october 2000 dsc-4877/06 1 ? 2000 ntegrated device technology, inc. features u 128k x 36, 256k x 18 memory configurations u u u u u supports fast access times: commercial: C 7.5ns up to 117mhz clock frequency commercial and industrial: C 8.0ns up to 100mhz clock frequency C 8.5ns up to 87mhz clock frequency u lbo input selects interleaved or linear burst mode u u u u u self-timed write cycle with global write control ( gw ), byte write enable ( bwe ), and byte writes ( bw x) u u u u u 3.3v core power supply u u u u u power down controlled by zz input u u u u u 2.5v i/o u u u u u packaged in a jedec standard 100-pin plastic thin quad flatpack (tqfp), 119 ball grid array (bga) and 165 fine pitch ball grid array (fbga) pin description summary note: 1. bw 3 and bw 4 are not applicable for the idt71v2579. description the IDT71V2577/79 are high-speed srams organized as 128k x 36/256k x 18. the IDT71V2577/79 srams contain write, data, address and control registers. there are no registers in the data output path (flow-through architecture). internal logic allows the sram to generate a self-timed write based upon a decision which can be left until the end of the write cycle. the burst mode feature offers the highest level of performance to the system designer, as the IDT71V2577/79 can provide four cycles of data for a single address presented to the sram. an internal burst address counter accepts the first cycle address from the processor, initiating the access sequence. the first cycle of output data will flow-through from the array after a clock-to-data access time delay from the rising clock edge of the same cycle. if burst mode operation is selected ( adv =low), the subsequent three cycles of output data will be available to the user on the next three rising clock edges. the order of these three addresses are defined by the internal burst counter and the lbo input pin. the IDT71V2577/79 srams utilize idts latest high-performance cmos process and are packaged in a jedec standard 14mm x 20mm 100-pin thin plastic quad flatpack (tqfp) as well as a 119 ball grid array (bga) and a 165 fine pitch ball grid array (fbga). a 0 -a 17 address inputs input synchronous ce chip enable input synchronous cs 0 , cs 1 chip selects input synchronous oe output enable input asynchronous gw global write enable input synchronous bwe byte write enable input synchronous bw 1 , bw 2 , bw 3 , bw 4 (1) individual byte write selects input synchronous clk clock input n/a adv burst address advance input synchronous adsc address status (cache controller) input synchronous adsp address status (processor) input synchronous lbo linear / interleaved burst order input dc zz sleep mode input asynchronous i/o 0 -i/o 31 , i/o p1 -i/o p4 data input / output i/o synchronous v dd , v ddq core power, i/o power supply n/a v ss ground supply n/a 48 77 tb l 01 128k x 36, 256k x 18 3.3v synchronous srams 2.5v i/o, flow-through outputs burst counter, single cycle deselect IDT71V2577 idt71v2579
6.42 2 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges pin definition (1) note: 1. all synchronous inputs must meet specified setup and hold times with respect to clk. symbol pin function i/o active description a 0 -a 17 address inputs i n/a synchronous address inputs. the address register is triggered by a combi-nation of the rising edge of clk and adsc low or adsp low and ce low. adsc address status (cache controller) i low synchronous address status from cache controller. adsc is an active low input that is used to load the address registers with new addresses. adsp address status (processor) i low synchronous address status from processor. adsp is an active low input that is used to load the address registers with new addresses. adsp is gated by ce . adv burst address advance i low synchronous address advance. adv is an active low input that is used to advance the internal burst counter, controlling burst access after the initial address is loaded. when the input is high the burst counter is not incremented; that is, there is no address advance. bwe byte write enable i low synchronous byte write enable gates the byte write inputs bw 1 - bw 4 . if bwe is low at the rising edge of clk then bw x inputs are passed to the next stage in the circuit. if bwe is high then the byte write inputs are blocked and only gw can initiate a write cycle. bw 1 - bw 4 individual byte write enables i low synchronous byte write enables. bw 1 controls i/o 0-7 , i/o p1 , bw 2 controls i/o 8-15 , i/o p2 , etc. any active byte write causes all outputs to be disabled. ce chip enable i low synchronous chip enable. ce is used with cs 0 and cs 1 to enable the IDT71V2577/79. ce also gates adsp . clk clock i n/a this is the clock input. all timing references for the device are made with respect to this input. cs 0 chip select 0 i high synchronous active high chip select. cs 0 is used w ith ce and cs 1 to enable the chip. cs 1 chip select 1 i low synchronous active low chip select. cs 1 is used w ith ce and cs 0 to enable the chip. gw global write enable i low synchronous global write enable. this input will write all four 9-bit data bytes when low on the rising edge of clk. gw supersedes individual byte write enables. i/o 0 -i/o 31 i/o p1 -i/o p4 data input/output i/o n/a synchronous data input/output (i/o) pins. the data input path is registered, triggered by the rising edge of clk. the data output path is flow-through (no output register). lbo linear burst order i low asynchronous burst order selection input. when lbo is high, the inter-leaved burst sequence is selected. when lbo is low the linear burst sequence is selected. lbo is a static input and must not change state while the device is operating. oe output enable i low asynchronous output enable. when oe is low the data output driv ers are enabled on the i/o pins if the chip is also selected. when oe is high the i/o pins are in a high-impedance state. v dd power supply n/a n/a 3.3v core power supply. v ddq power supply n/a n/a 2.5v i/o supply. v ss ground n/a n/a ground. nc no connect n/a n/a nc pins are not electrically connected to the device. zz sleep mode 1 high asynchronous sleep mode input. zz high will gate the clk internally and power down the IDT71V2577/79 to its lowest power consumption level. data retention is guaranteed in sleep mode. 4877 tbl 02
6.42 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges 3 functional block diagram a 0- a 16/17 address register clr a1* a0* 17/18 2 17/18 a 2- a 17 128k x 36/ 256k x 18- bit memory array internal address a 0 ,a 1 bw 4 bw 3 bw 2 bw 1 byte 1 write register 36/18 36/18 adsp adv clk adsc cs 0 cs 1 byte 1 write driver byte 2 write driver byte 3 write driver byte 4 write driver byte 2 write register byte 3 write register byte 4 write register 9 9 9 9 gw ce bwe lbo i/o 0 -i/o 31 i/o p1 -i/o p4 oe data input register 36/18 output buffer d q enable register oe burst sequence cen clk en clk en q1 q0 2 burst logic binary counter 4877 drw 01 zz powerdown ,
6.42 4 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges 100 pin tqfp capacitance (t a = +25c, f = 1.0mhz) recommended dc operating conditions recommended operating temperature and supply voltage absolute maximum ratings (1) notes: 1. stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. v dd terminals only. 3. v ddq terminals only. 4. input terminals only. 5. i/o terminals only. 6. this is a steady-state dc parameter that applies after the power supplies have ramped up. power supply sequencing is not necessary; however, the voltage on any input or i/o pin cannot exceed v ddq during power supply ramp up. 7. ta is the instant on case temperature. notes: 1. v ih (max) = v ddq + 1.0v for pulse width less than t cyc/2 , once per cycle. 2. v il (min) = -1.0v for pulse width less than t cyc/2 , once per cycle. note: 1. this parameter is guaranteed by device characterization, but not production tested. symbol rating commerical & industrial values unit v te rm (2) terminal voltage with respect to gnd -0.5 to +4.6 v v te rm (3,6) terminal voltage with respect to gnd -0.5 to v dd v v te rm (4,6) terminal voltage with respect to gnd -0.5 to v dd +0.5 v v te rm (5,6) terminal voltage with respect to gnd -0.5 to v ddq +0.5 v t a (7) commercial operating temperature -0 to +70 o c industrial operating temperature -40 to +85 o c t bias temperature under bias -55 to +125 o c t stg storage temperature -55 to +125 o c p t power dissipation 2.0 w i out dc output current 50 ma 48 77 tb l 03 grade temperature (1) v ss v dd v ddq commercial 0c to +70c 0v 3.3v 5% 2.5v 5% industrial -40c to +85c 0v 3.3v5% 2.5v5% 48 77 tbl 04 symbol parameter min. typ. max. unit v dd core supply voltage 3.135 3.3 3.465 v v ddq i/o supply voltage 2.375 2.5 2.625 v v ss supply voltage 0 0 0 v v ih input high voltage - inputs 1.7 ____ v dd + 0.3 v v ih input high voltage - i/o 1.7 ____ v ddq + 0.3 (1) v v il input low voltage -0.3 (2) ____ 0.7 v 48 77 tbl 05 symbol parameter (1) conditions max. unit c in input capacitance v in = 3dv 5 pf c i/o i/o capacitance v out = 3dv 7 pf 4877 tbl 07 119 bga capacitance (t a = +25c, f = 1.0mhz) symbol parameter (1) conditions max. unit c in input capacitance v in = 3dv 7 pf c i/o i/o capacitance v out = 3dv 7 pf 4877 tbl 07a notes: 1. ta is the instant on case temperature. 165 fbga capacitance (t a = +25c, f = 1.0mhz) symbol parameter (1) conditions max. unit c in input capacitance v in = 3dv tbd pf c i/o i/o capacitance v out = 3dv tbd pf 4877 tb l 07b
6.42 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges 5 pin configuration ? 128k x 36 100 tqfp top view notes: 1. pin 14 does not have to be directly connected to v ss as long as the input voltage is < v il . 2. pins 38 and 39 can be either nc or connected to v ss. 3. pin 64 can be left unconnected and the device will always remain in active mode. 10099989796959493929190 87868584838281 89 88 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 a 6 a 7 c e c s 0 b w 4 b w 3 b w 2 b w 1 c s 1 v d d v s s c lk g w b w e o e a d s c a d s p a d v a 8 a 9 nc 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 a 16 n c n c lb o a 14 a 13 a 12 a 11 a 10 v d d v s s a 0 a 1 a 2 a 3 a 4 a 5 i/o p4 i/o 31 i/o 30 v ddq v ss i/o 29 i/o 28 i/o 27 i/o 26 v ss v ddq i/o 25 i/o 24 v ss (1) v dd i/o 23 i/o 22 v ddq v ss i/o 21 i/o 20 i/o 19 i/o 18 v ss v ddq i/o 17 i/o 16 i/o p3 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 i/o p2 i/o 14 v ddq v ss i/o 13 i/o 12 i/o 11 i/o 10 v ss v ddq i/o 9 i/o 8 v ss nc v dd zz (3) i/o 7 i/o 6 v ddq v ss i/o 5 i/o 4 i/o 3 i/o 2 v ss v ddq i/o 1 i/o 0 i/o p1 v ss i/o 15 a 15 4877 drw 02a n c (2) n c (2) ,
6.42 6 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges pin configuration ? 256k x 18 100 tqfp top view notes: 1. pin 14 does not have to be directly connected to v ss as long as the input voltage is < v il . 2. pins 38 and 39 can be either nc or connected to v ss . 3. pin 64 can be left unconnected and the device will always remain in active mode. 10099989796959493929190 87868584838281 89 88 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 a 6 a 7 c e c s 0 n c n c b w 2 b w 1 c s 1 v d d v s s c lk g w b w e o e a d s c a d s p a d v a 8 a 9 nc 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 a 17 n c n c lb o a 15 a 14 a 13 a 12 a 11 v d d v s s a 0 a 1 a 2 a 3 a 4 a 5 nc nc nc v ddq v ss nc i/o p2 i/o 15 i/o 14 v ss v ddq i/o 13 i/o 12 v ss v dd i/o 11 i/o 10 v ddq v ss i/o 9 i/o 8 nc nc v ss v ddq nc nc nc 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 a 10 nc v ddq v ss nc i/o p1 i/o 7 i/o 6 v ss v ddq i/o 5 i/o 4 v ss nc v dd zz (3) i/o 3 i/o 2 v ddq v ss i/o 1 i/o 0 nc nc v ss v ddq nc nc nc v ss (1) nc a 16 4877 drw 02b n c (2) n c (2) ,
6.42 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges 7 pin configuration ? 256k x 18, 119 bga pin configuration ? 128k x 36, 119 bga top view top view notes: 1. r5 does not have to be directly connected to v ss as long as the input voltage is < v il . 2. l4 and u4 can be either nc or connected to v ss . 3. t7 can be left unconnected and the device will always remain in active mode. 4. dnu = do not use u2, u3, u4, u5 and u6 are reserved for respective jtag pins: tdi, tdo, tms, tck and trst on future revisions. within the current version these pins are not connected. 1234567 a v ddq a 6 a 4 adsp a 8 a 16 v ddq b nc cs 0 a 3 adsc a 9 cs 1 nc c a 7 a 2 v dd a 12 a 15 nc d i/o 16 i/o p3 v ss nc v ss i/o p2 i/o 15 e i/o 17 i/o 18 v ss ce v ss i/o 13 i/o 14 f v ddq i/o 19 v ss oe v ss i/o 12 v ddq g i/o 20 i/o 21 bw 3 adv bw 2 i/o 11 i/o 10 h i/o 22 i/o 23 v ss gw v ss i/o 9 i/o 8 j v ddq v dd nc v dd nc v dd v ddq k i/o 24 i/o 26 v ss clk v ss i/o 6 i/o 7 l i/o 25 i/o 27 bw 4 nc (2) bw 1 i/o 4 i/o 5 m v ddq i/o 28 v ss bwe v ss i/o 3 v ddq n i/o 29 i/o 30 v ss a 1 v ss i/o 2 i/o 1 p i/o 31 i/o p4 v ss a 0 v ss i/o 0 i/o p1 r nc a 5 lbo v dd nc a 13 t nc nc a 10 a 11 a 14 nc zz (3) u v ddq dnu (4) dnu (4) dnu (2,4) dnu (4) dnu (4) v ddq nc v ss 4877 drw 02c , 1234567 a v ddq a 6 a 4 adsp a 8 a 16 v ddq b nc cs 0 a 3 adsc a 9 cs 1 nc c a 7 a 2 v dd a 13 a 17 nc d i/o 8 nc v ss nc v ss i/o 7 nc e nc i/o 9 v ss ce v ss nc i/o 6 f v ddq nc v ss oe v ss i/o 5 v ddq g nc i/o 10 adv bw 2 nc i/o 4 h i/o 11 nc v ss gw v ss i/o 3 nc j v ddq v dd nc v dd nc v dd v ddq k nc i/o 12 v ss clk v ss nc i/o 2 l i/o 13 nc nc (2) bw 1 i/o 1 nc m v ddq i/o 14 v ss bwe v ss nc v ddq n i/o 15 nc v ss a 1 v ss i/o 0 nc p nc i/o p2 v ss a 0 v ss nc i/o p1 r nc a 5 lbo v dd nc a 12 v ss t nc a 10 a 15 nc a 14 a 11 zz (3) u v ddq dnu (4) dnu (4) dnu (2,4) dnu (4) dnu (4) v ddq 4877 drw 02d nc v ss v ss ,
6.42 8 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges pin configuration ? 256k x 18, 165 fbga pin configuration ? 128k x 36, 165 fbga notes: 1. h1 does not have to be directly v ss as long as input voltage is < v il . 2. h2 and n7 can be either nc or connected to v ss . 3. h11 can be left unconnected and the device will always remain in active mode. 4. pins p11, n6, b11, a1, r2 and p2 are reserved for 9m, 18m, 36m, 72m, 144m and 288m respectively. 5. dnu = do not use; pins p5, p7, r5, r7 and n5 are reserved for respective jtag pins: tdi, tdo, tms, tck and trst on future revisions. within the current version these pins are not connected. 1234567891011 anc (4) a 7 ce 1 bw 3 bw 2 cs 1 bwe adsc adv a 8 nc bnc a 6 cs 0 bw 4 bw 1 clk gw oe adsp a 9 nc (4) ci/o p3 nc v ddq v ss v ss v ss v ss v ss v ddq nc i/o p2 di/o 17 i/o 16 v ddq v dd v ss v ss v ss v dd v ddq i/o 15 i/o 14 ei/o 19 i/o 18 v ddq v dd v ss v ss v ss v dd v ddq i/o 13 i/o 12 fi/o 21 i/o 20 v ddq v dd v ss v ss v ss v dd v ddq i/o 11 i/o 10 gi/o 23 i/o 22 v ddq v dd v ss v ss v ss v dd v ddq i/o 9 i/o 8 hv ss (1) nc (2) nc v dd v ss v ss v ss v dd nc nc zz (3) ji/o 25 i/o 24 v ddq v dd v ss v ss v ss v dd v ddq i/o 7 i/o 6 ki/o 27 i/o 26 v ddq v dd v ss v ss v ss v dd v ddq i/o 5 i/o 4 li/o 29 i/o 28 v ddq v dd v ss v ss v ss v dd v ddq i/o 3 i/o 2 mi/o 31 i/o 30 v ddq v dd v ss v ss v ss v dd v ddq i/o 1 i/o 0 ni/o p4 nc v ddq v ss dnu (5) nc (4) nc (2) v ss v ddq nc i/o p1 pncnc (4) a 5 a 2 dnu (5) a 1 dnu (5) a 10 a 13 a 14 nc (4) r lbo nc (4) a 4 a 3 dnu (5) a 0 dnu (5) a 11 a 12 a 15 a 16 4877 tbl 17 1234567891011 anc (4) a 7 ce bw 2 nc cs 1 bwe adsc adv a 8 a 10 bnc a 6 cs 0 nc bw 1 clk gw oe adsp a 9 nc (4) cnc ncv ddq v ss v ss v ss v ss v ss v ddq nc i/o p1 dnc i/o 8 v ddq v dd v ss v ss v ss v dd v ddq nc i/o 7 enc i/o 9 v ddq v dd v ss v ss v ss v dd v ddq nc i/o 6 fnc i/o 10 v ddq v dd v ss v ss v ss v dd v ddq nc i/o 5 gnc i/o 11 v ddq v dd v ss v ss v ss v dd v ddq nc i/o 4 hv ss (1) nc (2) nc v dd v ss v ss v ss v dd nc nc zz (3) ji/o 12 nc v ddq v dd v ss v ss v ss v dd v ddq i/o 3 nc ki/o 13 nc v ddq v dd v ss v ss v ss v dd v ddq i/o 2 nc li/o 14 nc v ddq v dd v ss v ss v ss v dd v ddq i/o 1 nc mi/o 15 nc v ddq v dd v ss v ss v ss v dd v ddq i/o 0 nc ni/o p2 nc v ddq v ss dnu (5) nc (4) nc (2) v ss v ddq nc nc pnc nc (4) a 5 a 2 dnu (5) a 1 dnu (5) a 11 a 14 a 15 nc (4) r lbo nc (4) a 4 a 3 dnu (5) a 0 dnu (5) a 12 a 13 a 16 a 17 4877 tbl 17a
6.42 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges 9 dc electrical characteristics over the operating temperature and supply voltage range (1) dc electrical characteristics over the operating temperature and supply voltage range (v dd = 3.3v 5%) figure 2. lumped capacitive load, typical derating figure 1. ac test load ac test load ac test conditions (v ddq = 2.5v) note: 1. the lbo pin will be internally pulled to v dd if it is not actively driven in the application and the zz pin will be internally pulled to v ss if not actively driven. notes: 1. all values are maximum guaranteed values. 2. at f = f max, inputs are cycling at the maximum frequency of read cycles of 1/t cyc while adsc = low; f=0 means no input lines are changing. 3. for i/os v hd = v ddq - 0.2v, v ld = 0.2v. for other inputs v hd = v dd - 0.2v, v ld = 0.2v. v ddq /2 50 w i/o z 0 =50 w 4877d03 , symbol parameter test conditions min. max. unit |i li | input leakage current v dd = max., v in = 0v to v dd ___ 5a |i li | zz and lbo input leakage current (1) v dd = max., v in = 0v to v dd ___ 30 a |i lo | output leakage current v out = 0v to v ddq , device deselected ___ 5a v ol output low voltage i ol = +6ma, v dd = min. ___ 0.4 v v oh output high voltage i oh = -6ma, v dd = min. 2.0 ___ v 4877 tbl 08 symbol parameter test conditions 7.5ns 8ns 8.5ns unit com'l only com'l ind com'l ind i dd operating power supply current device selected, outputs open, v dd = max., v ddq = max., v in > v ih or < v il , f = f max (2) 255 200 210 180 190 ma i sb1 cmos standby power supply current device deselected, outputs open, v dd = max., v ddq = max., v in > v hd or < v ld , f = 0 (2,3) 30 30 35 30 35 ma i sb2 clock running power supply current device deselected, outputs open, v dd = max., v ddq = max., v in > v hd or < v ld , f = f max (2,3) 90 85 95 80 90 ma i zz full sleep mode supply c urrent zz > v hd, v dd = max. 30 30 35 30 35 ma 4877 tbl 09 input pulse levels input rise/fall times input timing reference levels output timing reference levels ac test load 0 to 2.5v 2ns (v ddq /2) (v ddq /2) see figure 1 48 77 tb l 10 1 2 3 4 20 30 50 100 200 d tcd (typical, ns) capacitance (pf) 80 5 6 4877d05 ,
6.42 10 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges synchronous truth table (1,3) notes: 1. l = v il , h = v ih , x = dont care. 2. oe is an asynchronous input. 3. zz = low for this table. operation address used ce cs 0 cs 1 adsp adsc adv gw bwe bw x oe (2) clk i/o deselected cycle, power down none h x x x l x x x x x - hi-z deselected cycle, power down none l x h l x x x x x x - hi-z deselected cycle, power down none l l x l x x x x x x - hi-z deselected cycle, power down none l x h x l x x x x x - hi-z deselected cycle, power down none l l x x l x x x x x - hi-z read cycle, begin burst external l h l l x x x x x l - d out read cycle, begin burst external l h l l x x x x x h - hi-z read cycle, begin burst external l h l h l x h h x l - d out read cycle, begin burst external l h l h l x h l h l - d out read cycle, begin burst external l h l h l x h l h h - hi-z write cycle, begin burst external l h l h l x h l l x - d in write cycle, begin burst external l h l h l x l x x x - d in read cycle, continue burst next x x x h h l h h x l - d out read cycle, continue burst next x x x h h l h h x h - hi-z read cycle, continue burst next x x x h h l h x h l - d out read cycle, continue burst next x x x h h l h x h h - hi-z read cycle, continue burst next h x x x h l h h x l - d out read cycle, continue burst next h x x x h l h h x h - hi-z read cycle, continue burst next h x x x h l h x h l - d out read cycle, continue burst next h x x x h l h x h h - hi-z write cycle, continue burst next x x x h h l h l l x - d in write cycle, continue burst next x x x h h l l x x x - d in write cycle, continue burst next h x x x h l h l l x - d in write cycle, continue burst next h x x x h l l x x x - d in read cycle, suspend burst current x x x h h h h h x l - d out read cycle, suspend burst current x x x h h h h h x h - hi-z read cycle, suspend burst current x x x h h h h x h l - d out read cycle, suspend burst current x x x h h h h x h h - hi-z read cycle, suspend burst current h x x x h h h h x l - d out read cycle, suspend burst current h x x x h h h h x h - hi-z read cycle, suspend burst current h x x x h h h x h l - d out read cycle, suspend burst current h x x x h h h x h h - hi-z write cycle, suspend burst current x x x h h h h l l x - d in write cycle, suspend burst current x x x h h h l x x x - d in write cycle, suspend burst current h x x x h h h l l x - d in write cycle, suspend burst current h x x x h h l x x x - d in 4877 tbl 11
6.42 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges 11 linear burst sequence table ( lbo =v ss ) synchronous write function truth table (1, 2) asynchronous truth table (1) interleaved burst sequence table ( lbo =v dd ) notes: 1. l = v il , h = v ih , x = dont care. 2. bw 3 and bw 4 are not applicable for the idt71v2579. 3. multiple bytes may be selected during the same cycle. notes: 1. l = v il , h = v ih , x = dont care. 2. synchronous function pins must be biased appropriately to satisfy operation requirements. note: 1. upon completion of the burst sequence the counter wraps around to its initial state. note: 1. upon completion of the burst sequence the counter wraps around to its initial state. operation gw bwe bw 1 bw 2 bw 3 bw 4 read hhxxxx read hl hhhh write all bytes lxxxxx write all bytes hlllll write byte 1 (3 ) hl l hhh write byte 2 (3 ) hlhlhh write byte 3 (3 ) hlhhlh write byte 4 (3 ) hl hhhl 4877 tbl 12 operation (2 ) oe zz i/o status power read l l data out active read h l high-z active write x l high-z C data in active deselected x l high-z standby sleep mode x h high-z sleep 4877 tbl 13 sequence 1 sequence 2 sequence 3 sequence 4 a1 a0 a1 a0 a1 a0 a1 a0 first address 0 0 0 1 1 0 1 1 second address 0 1 0 0 1 1 1 0 third address 1 0 1 1 0 0 0 1 fourth address (1 ) 11100100 4877 tbl 14 sequence 1 sequence 2 sequence 3 sequence 4 a1 a0 a1 a0 a1 a0 a1 a0 first address 0 0 0 1 1 0 1 1 second address 0 1 1 0 1 1 0 0 third address 1 0 1 1 0 0 0 1 fourth address (1 ) 11000 110 4877 tbl 15
6.42 12 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges ac electrical characteristics (v dd = 3.3v 5%, commercial and industrial temperature ranges) 7.5ns (5) 8ns 8.5ns symbol parameter min. max. min. max. min. max. unit clock parameter t cy c clock cycle time 8.5 ____ 10 ____ 11. 5 ____ ns t ch (1) clock high pulse width 3 ____ 4 ____ 4.5 ____ ns t cl (1) clock low pulse width 3 ____ 4 ____ 4.5 ____ ns output parameters t cd clock high to valid data ____ 7.5 ____ 8 ____ 8.5 ns t cdc clock high to data change 2 ____ 2 ____ 2 ____ ns t cl z (2) clock high to output active 0 ____ 0 ____ 0 ____ ns t chz (2) clock high to data high-z 2 3.5 2 3.5 2 3.5 ns t oe output enable access time ____ 3.5 ____ 3.5 ____ 3.5 ns t ol z (2) output enable low to output active 0 ____ 0 ____ 0 ____ ns t ohz (2) outp ut enable high to output high-z ____ 3.5 ____ 3.5 ____ 3.5 ns set up times t sa address setup time 1.5 ____ 2 ____ 2 ____ ns t ss address status setup time 1.5 ____ 2 ____ 2 ____ ns t sd data in setup time 1.5 ____ 2 ____ 2 ____ ns t sw write setup time 1.5 ____ 2 ____ 2 ____ ns t sav address advance setup time 1.5 ____ 2 ____ 2 ____ ns t sc chip enable/select setup time 1.5 ____ 2 ____ 2 ____ ns hold times t ha address hold time 0.5 ____ 0.5 ____ 0.5 ____ ns t hs address status hold time 0.5 ____ 0.5 ____ 0.5 ____ ns t hd data in hold time 0.5 ____ 0.5 ____ 0.5 ____ ns t hw write hold time 0.5 ____ 0.5 ____ 0.5 ____ ns t hav address advance hold time 0.5 ____ 0.5 ____ 0.5 ____ ns t hc chip enable/select hold time 0.5 ____ 0.5 ____ 0.5 ____ ns sleep mode and configuration parameters t zzp w zz pulse width 100 ____ 100 ____ 100 ____ ns t zzr (3) zz recovery time 100 ____ 100 ____ 100 ____ ns t cfg (4) configuration set-up time 34 ____ 40 ____ 50 ____ ns 4877 tbl 16 notes: 1. measured as high above v ih and low below v il . 2. transition is measured 200mv from steady-state. 3. device must be deselected when powered-up from sleep mode. 4. t cfg is the minimum time required to configure the device based on the lbo input. lbo is a static input and must not change during normal operation. 5. commercial temperature range only.
6.42 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges 13 timing waveform of flow-through read cycle (1,2) t c h z t s a t s c t h s g w ,b w e ,b w x t s w t c l t s a v t h w t h a v c lk a d s p a d s c (1) a d d r e s s t c y c t c h t h a t h c t o e t o h z o e t c d t o lz o 1(a x) d a t a o u t t c d c o 1(a y) o 2(a y) o 2(a y) a d v c e ,c s 1 (n ote 3) f low -through r ead b urst f low -through r ead o utput d isabled a x a y t s s o 1(a y) o 4(a y) o 3(a y) (b urst w raps around to its initial state) 4877 drw 06 a d v h ig h suspends burst , notes: 1. o1 (ax) represents the first output from the external address ax. o1 (ay) represents the first output from the external addr ess ay; o2 (ay) represents the next output data in the burst sequence of the base address ay, etc. where a0 and a1 are advancing for the four word burst in the sequence defined by the state of the lbo input. 2. zz input is low and lbo is don't care for this cycle. 3. cs 0 timing transitions are identical but inverted to the ce and cs 1 signals. for example, when ce and cs 1 are low on this waveform, cs 0 is high.
6.42 14 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges timing waveform of combined flow-through read and write cycles (1,2,3) o 1(a z) c lk a d s p a d d r e s s g w a d v o e d a t a o u t t c y c t c h t c l t h a t s w t h w t c lz a x a y a z t h s i1(a y) t s d t h d t o lz t c d t c d c d a t a in (2) t o e o 1(a z) s ingle r ead f low -through b urst r ead w rite t o h z t s s t s a o 3(a z) o 2(a z) o 4(a z) o 1(a x) 4877 drw 07 t c d , notes: 1. device is selected through entire cycle; ce and cs 1 are low, cs 0 is high. 2. zz input is low and lbo is don't care for this cycle. 3. o1 (ax) represents the first output from the external address ax. i1 (ay) represents the first input from the external addre ss ay; o1 (az) represents the first output from the external address az; o2 (az) represents the next output data in the burst sequence of the base address az, etc. where a0 and a1 are advancing for the four word burst i n the sequence defined by the state of the lbo input.
6.42 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges 15 timing waveform of write cycle no. 1 - gw controlled (1,2,3) a d d r e s s c l k a d s p a d s c t c y c t s s t h s t c h t c l t h a t s a a x a y a z a d v d a t a o u t o e t h c t s d i1(a x) i1(a z) i2(a y) th d t o h z d a t a in t h a v o 4(a w ) c e , c s 1 t h w g w t s w (n ote 3) i2(a z) i3(a z) i4(a y) i3(a y) i2(a y) t s a v ( a d v suspends burst) i1(a y) t s c (1) (2) o 3(a w ) 4877 drw 08 g w is ignored w hen a d s p initiates a cycle and is sam pled on the next cycle rising edge , notes: 1. zz input is low, bwe is high and lbo is don't care for this cycle. 2. o4 (aw) represents the final output data in the burst sequence of the base address aw. i1 (ax) represents the first input fr om the external address ax. i1 (ay) represents the first input from the external address ay; i2 (ay) represents the next input data in the burst sequence of the base address ay, etc. where a0 and a1 are advan cing for the four word burst in the sequence defined by the state of the lbo input. in the case of input i2 (ay) this data is valid for two cycles because adv is high and has suspended the burst. 3. cs 0 timing transitions are identical but inverted to the ce and cs 1 signals. for example, when ce and cs 1 are low on this waveform, cs 0 is high.
6.42 16 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges timing waveform of write cycle no. 2 - byte controlled (1,2,3) a d d r e s s c l k a d s p a d s c t c y c t s s t h s t c h t c l t h a t s a a x a y t h w b w x a d v d a t a o u t o e t h c t s d s ingle w rite b urst w rite i1(a x) i2(a y) i2(a y) i2(a z) th d b urst r ead e xtended b urst w rite t o h z d a t a in t s a v t s w o 4(a w ) c e , c s 1 t h w b w e t s w (n ote 3) i1(a z) a z i4(a y) i1(a y) i4(a y) i3(a y) t s c b w e is ignored w hen a d s p initiates a cycle and is sam pled on the next cycle rising edge b w x is ignored w hen a d s p initiates a cycle and is sam pled on the next clock rising edge i3(a z) o 3 (a w ) 4877 drw 09 ( a d v h ig h suspends burst) , notes: 1. zz input is low, gw is high and lbo is don't care for this cycle. 2. o4 (aw) represents the final output data in the burst sequence of the base address aw. i1 (ax) represents the first input fr om the external address ax. i1 (ay) represents the first input from the external address ay; i2 (ay) represents the next input data in the burst sequence of the base address ay, etc. where a0 and a1 are advan cing for the four word burst in the sequence defined by the state of the lbo input. in the case of input i2 (ay) this data is valid for two cycles because adv is high and has suspended the burst. 3. cs 0 timing transitions are identical but inverted to the ce and cs 1 signals. for example, when ce and cs 1 are low on this waveform, cs 0 is high.
6.42 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges 17 t c y c t s s t c l t c h t h a t s a t s c t h c t o e t o lz t h s c l k a d s p a d s c a d d r e s s g w c e ,c s 1 a d v d a t a o u t o e z z s ingle r ead s nooze m ode tz z p w 4877 drw 13 o 1 (a x) a x (n o te 4) tz z r a z , notes: 1. device must power up in deselected mode 2. lbo is don't care for this cycle. 3. it is not necessary to retain the state of the input registers throughout the power-down cycle. 4. cs timing transitions are identical but inverted to the ce and cs 1 signaals. for example, when ce and cs 1 are low on this waveform, cs 0 is high. timing waveform of sleep (zz) and power-down modes (1,2,3)
6.42 18 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges non-burst write cycle timing waveform clk adsp gw ce, cs 1 cs 0 address adsc data in av aw ax az ay (av) (aw) (ax) (az) (ay) 4877 drw 11 , notes: 1. zz input is low, adv and oe are high, and lbo is don't care for this cycle. 2. (ax) represents the data for address ax, etc. 3. although only gw writes are shown, the functionality of bwe and bw x together is the same as gw . 4. for write cycles, adsp and adsc have different limitations. non-burst read cycle timing waveform clk adsp gw,bwe,bwx ce, cs 1 cs 0 address adsc data out oe av aw ax ay az (av) (aw) (ax) (ay) 4877 drw 10 , notes: 1. zz input is low, adv is high and lbo is don't care for this cycle. 2. (ax) represents the data for address ax, etc. 3. for read cycles, adsp and adsc function identically and are therefore interchangable.
6.42 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges 19 100-pin thin quad plastic flatpack (tqfp) package diagram outline
6.42 20 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges 119 ball grid array (bga) package diagram outline
6.42 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges 21 165 fine pitch ball grid array (fbga) package diagram outline
6.42 22 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges ordering information 100-pin plastic thin quad flatpack (tqfp) 119 ball grid array (bga) 165 fine pitch ball grid array (fbga) s power x speed xx package pf bg bq idt xxx 75* 80 85 access time in tenths of nanoseconds 4877 drw 12 device type 128k x 36 flow-through burst synchronous sram with 2.5v i/o 256k x 18 flow-through burst synchronous sram with 2.5v i/o 71v2577 71v2579 , x process/ temperature range commercial (0c to +70c) industrial (-40c to +85c) blank i *commercial temperature ran g e onl y .
6.42 IDT71V2577, idt71v2579, 128k x 36, 256k x 18, 3.3v synchronous srams with 2.5v i/o, flow-through outputs, burst counter, single cycle deselect commercial and industrial temperature ra nges 23 corporate headquarters for sales: for tech support: 2975 stender way 800-345-7015 or 408-727-6116 sramhelp@idt.com santa clara, ca 95054 fax: 408-492-8674 800-544-7726, x4033 www.idt.com the idt logo is a registered trademark of integrated device technology, inc. datasheet document history 7/23/99 updated to new format 9/17/99 pg. 2 revised i/o pin description pg. 3 revised block diagram for flow-through functionality pg. 8 revised i sb1 and i zz for speeds 7.5 to 8.5ns pg. 18 added 119-lead bga package diagram pg. 20 added datasheet document history 12/31/99 pg. 1, 4, 8, 11, 19 added industrial temperature range offerings 04/04/00 pg. 18 add 100pin tqfp package diagram outline pg. 4 add capacitance table for bga package; add industrial temperature to table; insert note to absolute max rating table and recommended operating temperature tables. 06/01/00 add new package offering, 13 x 15mm 165 fbga pg. 20 correct 119bga package diagram outline 07/15/00 pg. 7 add note reference to bg119 pinout pg. 8 add dnu reference note to bq165 pinout pg. 20 update bg119 package diagram outline dimensions 10/25/00 remove preliminary status pg. 8 add reference note to pin n5 on bq165 pinout, reserved for jtag trst

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