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1 white electronic designs corporation ? (602) 437-1520 ? www.whiteedc.com white electronic designs wme128k8-xxx a 0-16 address inputs i/o 0-7 data input/output cs chip select oe output enable we write enable vcc +5.0v power v ss ground january 2004 rev. 5 features read access times of 120, 140, 150, 200, 250, 300ns jedec approved packages ? 32 pin, hermetic ceramic, 0.600" dip (package 300) ? 32 lead, hermetic ceramic, 0.400" soj (package 101) commercial, industrial and military temperature ranges mil-std-883 compliant devices available write endurance 10,000 cycles data retention at 25c, 10 years low power cmos operation automatic page write operation ? internal address and data latches for 128 bytes ? internal control timer page write cycle time 10ms max. data polling for end of write detection hardware and software data protection ttl compatible inputs and outputs fig. 1 p in c onfiguration 32 dip 32 csoj t op v iew 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 nc a16 a15 a12 a7 a6 a5 a4 a3 a2 a1 a0 i/o0 i/o1 i/o2 v ss v cc we nc a14 a13 a8 a9 a11 oe a10 cs i/o7 i/o6 i/o5 i/o4 i/o3 p in d escription 128kx8 cmos monolithic eeprom, smd 5962-96796
2 white electronic designs corporation ? phoenix az ? (602) 437-1520 white electronic designs wme128k8-xxx i current source d.u.t. c = 50 pf eff i ol v 1.5v (bipolar supply) z current source oh fig. 2 ac t est c ircuit parameter symbol conditions unit min max input leakage current i li v cc = 5.5, v in = gnd to v cc 10 a output leakage current i lo cs = v ih , oe = v ih , v out = gnd to v cc 10 a dynamic supply current i cc cs = v il , oe = v ih , f = 5mhz, vcc = 5.5 80 ma standby current i sb cs = v ih , oe = v ih , f = 5mhz, vcc = 5.5 0.625 ma output low voltage v ol i ol = 2.1ma, vcc = 4.5v .45 v output high voltage v oh i oh = -400a, vcc = 4.5v 2.4 v note: dc test conditions: v ih = v cc -0.3v, v il = 0.3v t ruth t able a bsolute m aximum r atings c apacitance (t a = +25c) note: stresses above 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 device reliability. dc c haracteristics (v cc = 5.0v, v ss = 0v, t a = -55c to +125c) recommended operating conditions ac t est c onditions notes: v z is programmable from -2v to +7v. i ol & i oh programmable from 0 to 16ma. tester impedance z 0 = 75 ? . v z is typically the midpoint of v oh and v ol . i ol & i oh are adjusted to simulate a typical resistive load circuit. ate tester includes jig capacitance. parameter symbol unit operating temperature t a -55 to +125 c storage temperature t stg -65 to +150 c signal voltage any pin v g -0.6 to + 6.25 v voltage on oe and a9 -0.6 to +13.5 v cs oe we mode data i/o h x x standby high z l l h read data out l h l write data in x h x out disable high z/data out x x h write x l x inhibit parameter sym condition unit max input capacitance c in v in = 0v, f = 1mhz 20 pf output capacitance c out v i / o = 0v, f = 1mhz 20 pf this parameter is guaranteed by design but not tested. parameter symbol min max unit supply voltage v cc 4.5 5.5 v input high voltage v ih 2.0 v cc + 0.3 v input low voltage v il -0.3 +0.8 v operating temp. (mil.) t a -55 +125 c operating temp. (ind.) t a -40 +85 c parameter ty p unit input pulse levels v il = 0, v ih = 3.0 v input rise and fall 5 ns input and output reference level 1.5 v output timing reference level 1.5 v
3 white electronic designs corporation ? (602) 437-1520 ? www.whiteedc.com white electronic designs wme128k8-xxx parameter symbol -120 -140 -150 -200 -250 -300 unit min max min max min max min max min max min max read cycle time t rc 120 140 150 200 250 300 ns address access time t acc 120 140 150 200 250 300 ns chip select access time t acs 120 140 150 200 250 300 ns output hold from address change, oe or cs t oh 00 0000ns output enable to output valid t oe 50 55 55 55 85 85 ns chip select or output enable to high z output t df 60 70 70 70 70 70 ns figure 3 shows read cycle waveforms. a read cycle be- gins with selection address, chip select and output en- able. chip select is accomplished by placing the cs line low. output enable is done by placing the oe line low. the memory places the selected data byte on i/o 0 through i/o 7 after the access time. the output of the memory is placed in a high impedance state shortly after either the oe line or cs line is returned to a high level. read ac r ead c haracteristics (s ee f igure 3) (v cc = 5.0v, v ss = 0v, t a = -55c to +125c) fig. 3 read waveforms t a ddress cs oe output oh t df t acc t rc t oe t acs output valid address valid high z note: oe may be delayed up to t acs - t oe after the falling edge of cs without impact on t oe or by t acc - t oe after an address change without impact on t acc .
4 white electronic designs corporation ? phoenix az ? (602) 437-1520 white electronic designs wme128k8-xxx write cycle timing figures 4 and 5 show the write cycle timing relation- ships. a write cycle begins with address application, write enable and chip select. chip select is accom- plished by placing the cs line low. write enable con- sists of setting the we line low. the write cycle begins when the last of either cs or we goes low. the we line transition from high to low also initiates an internal 150sec delay timer to permit page mode op- eration. each subsequent we transition from high to low that occurs before the completion of the 150sec time out will restart the timer from zero. the operation of the timer is the same as a retriggerable one-shot. write operations are initiated when both cs and we are low and oe is high. the eeprom devices support both a cs and we controlled write cycle. the address is latched by the falling edge of either cs or we, which- ever occurs last. the data is latched internally by the rising edge of ei- ther cs or we, whichever occurs first. a byte write operation will automatically continue to completion. write ac write characteristics (v cc = 5.0v, v ss = 0v, t a = -55c to +125c) parameter symbol 128kx8 unit min max write cycle time, typ = 6ms t wc 10 ms address set-up time t as 10 ns write pulse width (we or cs) t wp 100 ns chip select set-up time t cs 0ns address hold time t ah 100 ns data hold time t dh 10 ns chip select hold time t ch 0ns data set-up time t ds 50 ns output enable set-up time t oes 0ns output enable hold time t oeh 0ns write pulse width high t wph 50 ns
5 white electronic designs corporation ? (602) 437-1520 ? www.whiteedc.com white electronic designs wme128k8-xxx fig. 4 write waveforms we controlled t a ddress (1) cs we data in dh t wph t wp t csh t oeh t ah t oes t as t cs oe t wc t ds t a ddress we cs data in dh t wph t wp t csh t oeh t ah t oes t as t cs oe t ds t wc fig. 5 write waveforms cs controlled note: 1. decoded address lines must be valid for the duration of the write.
6 white electronic designs corporation ? phoenix az ? (602) 437-1520 white electronic designs wme128k8-xxx data polling the wme128k8-xxx offers a data polling feature which allows a faster method of writing to the device. figure 6 shows the timing diagram for this function. during a byte or page write cycle, an attempted read of the last byte written will result in the complement of the written data on i/o7. once the write cycle has been completed, true data is valid on all outputs and the next cycle may begin. data polling may begin at any time during the write cycle. data polling characteristics (v cc = 5.0v, v cc = 0v, t a = -55c to +125c) fig. 6 data polling waveforms parameter symbol min max unit data hold time t dh 10 ns oe hold time t oeh 10 ns oe to output valid t oe 55 ns write recovery time t wr 0ns we t oeh t dh t oe t wr high z cs oe i/o 7 a ddress toggle but characteristics (1) symbol parameter min max units t dh data hold time 10 ns t oeh oe hold time 10 ns t oe oe to output delay ns t oehp oe high pulse 150 ns t wr write recovery time 0 ns toggle bit: in addition to data polling another method for determining the end of a write cycle is provided . during the write operation, successive attempts to read data from the device will result in i/o 6 toggling between one and zero. once the write has completed, i/o 6 will stop toggling and valid data will be read. reading the toggle bit may begin at any time during the write cycle. note: 1. toggling either oe or cs or both oe and cs will operate toggle bit. 2. beginning and ending state of i/o6 will vary 3. any address location may be used but the address should not vary. twr high z tdh toe toeh we cs oe i/o6 (2)
7 white electronic designs corporation ? (602) 437-1520 ? www.whiteedc.com white electronic designs wme128k8-xxx page write operation the wme128k8-xxx has a page write operation that allows one to 128 bytes of data to be written into the device and consecutively loads during the internal pro- gramming period. successive bytes may be loaded in the same manner after the first data byte has been loaded. an internal timer begins a time out operation at each write cycle. if another write cycle is completed within 150s or less, a new time out period begins. each write cycle restarts the delay period. the write cycles can be continued as long as the interval is less than the time out period. the usual procedure is to increment the least signifi- cant address lines from a0 through a6 at each write cycle. in this manner a page of up to 128 bytes can be loaded in to the eeprom in a burst mode before be- ginning the relatively long interval programming cycle. after the 150s time out is completed, the eeprom begins an internal write cycle. during this cycle the entire page of bytes will be written at the same time. the internal programming cycle is the same regardless of the number of bytes accessed. page write characteristics (v cc = 5.0v, v ss = 0v, t a = -55c to +125c) fig. 7 page mode write waveforms 1. page address must remain valid for duration of write cycle. page mode write characteristics symbol unit parameter min max write cycle time, typ = 6ms t wc 10 ms address set-up time t as 10 ns address hold time (1) t ah 100 ns data set-up time t ds 50 ns data hold time t dh 10 ns write pulse width t wp 100 ns byte load cycle time t blc 150 s write pulse width high t wph 50 ns oe byte 0 byte 1 byte 2 byte 3 valid data valid address t wc t blc t wph t wp a ddress data cs we byte 127 t ds t dh t as t ah
8 white electronic designs corporation ? phoenix az ? (602) 437-1520 white electronic designs wme128k8-xxx fig. 8 software data protection enable algorithm (1) notes: 1. data format: i/o 7 -i/o 0 (hex); address format: a 16 -a 0 (hex). 2. write protect state will be activated at end of write even if no other data is loaded. 3. write protect state will be deactivated at end of write period even if no other data is loaded. 4. 1 to 128 bytes of data may be loaded. load data aa to address 5555 load data 55 to address 2aaa load data a0 to address 5555 load data xx to any address (4) load last byte to last address writes enabled (2) enter data protect state
9 white electronic designs corporation ? (602) 437-1520 ? www.whiteedc.com white electronic designs wme128k8-xxx hardware data protection these features protect against inadvertent writes to the wme128k8-xxx. these are included to improve reli- ability during normal operation: a) vcc power on delay as vcc climbs past 3.8v typical the device will wait 5msec typical before allowing write cycles. b) vcc sense while below 3.8v typical write cycles are inhibited. c) write inhibiting holding oe low and either cs or we high inhibits write cycles. d) noise filter pulses of <15ns (typ) on we or cs will not initiate a write cycle. fig. 9 software block data protection disable algorithm software data protection a software write protection feature may be enabled or disabled by the user. when shipped by white micro- electronics, the wme128k8-xxx has the feature dis- abled. write access to the device is unrestricted. to enable software write protection, the user writes three access code bytes to three special internal locations. once write protection has been enabled, each write to the eeprom must use the same three byte write se- quence to permit writing. after setting software data protection, any attempt to write to the device without the three-byte command sequence will start the inter- nal write timers. no data will be written to the device; however, for the duration of twc. the write protection feature can be disabled by a six byte write sequence of specific data to specific locations. power transitions will not reset the software write protection. the software write protection guards against inadvert- ent writes during power transitions or unauthorized modification using a prom programmer. notes: 1. data format: i/o 7 -i/o 0 (hex); address format: a 16 -a 0 (hex). 2. write protect state will be activated at end of write even if no other data is loaded. 3. write protect state will be deactivated at end of write period even if no other data is loaded. 4. 1 to 128 bytes of data may be loaded. load data aa to address 5555 load data 55 to address 2aaa load data 80 to address 5555 load data aa to address 5555 load data 55 to address 2aaa load data 20 to address 5555 load data xx to any address (4) load last byte to last address (3) exit data protect state
10 white electronic designs corporation ? phoenix az ? (602) 437-1520 white electronic designs wme128k8-xxx all linear dimensions are millimeters and parenthetically in inches package 101: 32 lead, ceramic soj 1.27 (0.050) typ 21.1 (0.830) 0.25 (0.010) pin 1 identifier 19.1 (0.750) typ 11.3 (0.446) 0.2 (0.009) 3.96 (0.156) max 0.2 (0.008) 0.05 (0.002) 9.55 (0.376) 0.25 (0.010) 1.27 (0.050) 0.25 (0.010) 0.89 (0.035) radius typ package 300: 32 pin, ceramic dip, single cavity side brazed 42.4 (1.670) 0.4 (0.016) pin 1 identifier 0.84 (0.033) 0.4 (0.014) 4.34 (0.171) 0.79 (0.031) 15.04 (0.592) 0.3 (0.012) all linear dimensions are millimeters and parenthetically in inches
11 white electronic designs corporation ? (602) 437-1520 ? www.whiteedc.com white electronic designs wme128k8-xxx lead finish: blank = gold plated leads a = solder dip leads device grade: q = mil-std-883 compliant m = military screened -55c to +125c i = industrial -40c to +85c c = commercial 0c to +70c package type: c = 32 pin ceramic dip (package 300) de = 32 lead csoj (package 101) access time (ns) organization 128k x 8 eeprom monolithic white electronic designs corp. o rdering i nforma tion device type speed package smd no. 128k x 8 eeprom monolithic 300ns 32 pin dip (c) 5962-96796 01hyx 128k x 8 eeprom monolithic 250ns 32 pin dip (c) 5962-96796 02hyx 128k x 8 eeprom monolithic 200ns 32 pin dip (c) 5962-96796 03hyx 128k x 8 eeprom monolithic 150ns 32 pin dip (c) 5962-96796 04hyx 128k x 8 eeprom monolithic 140ns 32 pin dip (c) 5962-96796 05hyx 128k x 8 eeprom monolithic 120ns 32 pin dip (c) 5962-96796 06hyx 128k x 8 eeprom monolithic 300ns 32 lead soj (de) 5962-96796 01hxx 128k x 8 eeprom monolithic 250ns 32 lead soj (de) 5962-96796 02hxx 128k x 8 eeprom monolithic 200ns 32 lead soj (de) 5962-96796 03hxx 128k x 8 eeprom monolithic 150ns 32 lead soj (de) 5962-96796 04hxx 128k x 8 eeprom monolithic 140ns 32 lead soj (de) 5962-96796 05hxx 128k x 8 eeprom monolithic 120ns 32 lead soj (de) 5962-96796 06hxx w m e 128k8 - xxx x x x

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