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ly6225616 rev. 1.5 256k x 16 bit low power cmos sram lyontek inc. reserves the rights to change the specificati ons and products without notice. 5f, no. 2, industry e. rd. ix, science-ba sed industrial park, hsinchu 300, taiwan. tel: 886-3-6668838 fax: 886-3-6668836 0 ? revision history revision description issue date rev. 1.0 initial issue sep.6.2007 rev. 1.1 a dded -45 ns spec. added ?sle/sli spec. no v .9.2007 rev. 1.2 deleted -35 ns spec. added i sb1 /i dr values when t a = 25 and t a = 40 revised features & ordering information lead free and green package available to green package available added packing type in ordering information deleted t solder in absolute maximun ratings mar.30.2009 rev. 1.3 revised v dr sep.11.2009 rev. 1.4 rev. 1.5 revised package outline dimension in page 11 revised ordering information in page 12 ma y .6.2010 aug.25.2010
ly6225616 rev. 1.5 256k x 16 bit low power cmos sram lyontek inc. reserves the rights to change the specificati ons and products without notice. 5f, no. 2, industry e. rd. ix, science-ba sed industrial park, hsinchu 300, taiwan. tel: 886-3-6668838 fax: 886-3-6668836 1 ? features ? fast access time : 45/55/70ns ? low power consumption: operating current : 45/40/30ma (typ.) standby current : 5 a@5v(typ.) ll/sl version 3 a@3v(typ.) sl version ? single 4.5v ~ 5.5v power supply ? all inputs and outputs ttl compatible ? fully static operation ? tri-state output ? data byte control : lb# (dq0 ~ dq7) ub# (dq8 ~ dq15) ? data retention voltage : 1.5v (min.) ? green package available ? package : 44-pin 400 mil tsop-ii 48-ball 6mm x 8mm tfbga general description the ly6225616 is a 4,194,304-bit low power cmos static random access memory organized as 262,144 words by 16 bits. it is fabricated using very high performance, high reliability cmos technology. its standby current is stable within the range of operating temperature. the ly6225616 is well designed for low power application, and particularly well suited for battery back-up nonvolatile memory application. the ly6225616 operates from a single power supply of 4.5v ~ 5.5v and all inputs and outputs are fully ttl compatible product family product family operating temperatur e vcc range speed power dissipation standby(i sb1, typ.) operating(icc,typ.) ly6225616(ll) 0 ~ 70 4.5 ~ 5.5v 45/55/70ns - 5a@5v 45/40/30ma ly6225616(lle) -20 ~ 80 4.5 ~ 5.5v 45/55/70ns - 5a@5v 45/40/30ma ly6225616(lli) -40 ~ 85 4.5 ~ 5.5v 45/55/70ns - 5a@5v 45/40/30ma ly6225616(sl) 0 ~ 70 4.5 ~ 5.5v 45/55/70ns 3 a@3v 5a@5v 45/40/30ma ly6225616(sle) -20 ~ 80 4.5 ~ 5.5v 45/55/70ns 3 a@3v 5a@5v 45/40/30ma ly6225616(sli) -40 ~ 85 4.5 ~ 5.5v 45/55/70ns 3 a@3v 5a@5v 45/40/30ma
ly6225616 rev. 1.5 256k x 16 bit low power cmos sram lyontek inc. reserves the rights to change the specificati ons and products without notice. 5f, no. 2, industry e. rd. ix, science-ba sed industrial park, hsinchu 300, taiwan. tel: 886-3-6668838 fax: 886-3-6668836 2 ? functional block diagram control circuit ce# we# oe# decoder 256kx16 memory array column i/o a0-a17 vcc vss dq8-dq15 upper byte dq0-dq7 lower byte i/o data circuit lb# ub# pin description symbol description a0 - a17 address inputs dq0 ? dq15 data inputs/outputs ce# chip enable input we# write enable input oe# output enable input lb# lower byte control ub# upper byte control v cc power supply v ss ground
ly6225616 rev. 1.5 256k x 16 bit low power cmos sram lyontek inc. reserves the rights to change the specificati ons and products without notice. 5f, no. 2, industry e. rd. ix, science-ba sed industrial park, hsinchu 300, taiwan. tel: 886-3-6668838 fax: 886-3-6668836 3 ? pin configuration ly6225616 a1 a2 a3 a4 dq15 dq0 dq1 dq2 vcc vss a12 a17 dq14 dq12 dq13 dq11 vss vcc dq10 dq9 dq3 dq4 tsop ii 28 14 13 12 11 10 9 8 7 6 5 4 3 2 1 17 16 15 20 19 18 22 23 24 25 26 27 21 a16 a0 dq6 dq7 a5 a6 a7 a8 a9 dq5 dq8 a15 a14 a13 a10 nc 34 29 30 31 32 33 44 39 40 41 42 43 35 36 37 38 a11 ce# we# lb# ub# oe# tfbga nc a3 a10 a9 a11 a0 a14 a8 nc we# dq9 dq14 dq15 nc vss nc a13 dq8 vcc vcc dq7 a15 vss ce# lb# dq6 dq2 dq0 a2 oe# a1 a6 a5 a4 ub# 123456 h g c d e f a b a12 nc a17 a7 a16 dq10 dq11 dq12 dq13 dq5 dq4 dq3 dq1 absolute maximun ratings* parameter symbol rating unit voltage on v cc relative to v ss v t1 -0.5 to 6.5 v voltage on any other pin relative to v ss v t2 -0.5 to v cc +0.5 v operating temperature t a 0 to 70(c grade) -20 to 80(e grade) -40 to 85(i grade) storage temperature t stg -65 to 150 power dissipation p d 1 w dc output current i out 50 ma *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 or any other conditions above those indicated in the operational sections of this specification is not implied. exposure to the absolute maximum rating conditions for extended period may affect device reliabil ity.
ly6225616 rev. 1.5 256k x 16 bit low power cmos sram lyontek inc. reserves the rights to change the specificati ons and products without notice. 5f, no. 2, industry e. rd. ix, science-ba sed industrial park, hsinchu 300, taiwan. tel: 886-3-6668838 fax: 886-3-6668836 4 ? truth table mode ce# oe# we# lb# ub# i/o operation supply current dq0-dq7 dq8-dq15 standby h x x x x x x h x h high ? z high ? z high ? z high ? z i sb1 output disable l l h h h h l x x l high ? z high ? z high ? z high ? z i cc ,i cc1 read l l l l l l h h h l h l h l l d out high ? z d out high ? z d out d out i cc ,i cc1 write l l l x x x l l l l h l h l l d in high ? z d in high ? z d in d in i cc ,i cc1 note: h = v ih , l = v il , x = don't care. dc electrical characteristics parameter symbo l test condition min. typ. * 4 max. unit supply voltage v cc 4.5 5.0 5.5 v input high voltage v ih *1 2.4 - v cc +0.3 v input low voltage v il *2 - 0.2 - 0.6 v input leakage current i li v cc R v in R v ss - 1 - 1 a output leakage current i lo v cc R v out R v ss , output disabled - 1 - 1 a output high voltage v oh i oh = -1m a 2.4 - - v output low voltage v ol i ol = 2m a - - 0.4 v average operating power supply current i cc cycle time = min. ce# = v il , i i/o = 0ma other pins at v il or v ih -45 - 45 70 m a -55 - 40 60 m a - 70 - 30 50 m a i cc1 cycle time = 1 s ce# = 0.2v , i i/o = 0ma other pins at 0.2v or v cc - 0.2v - 4 10 ma standby power supply current i sb1 ce# v R cc - 0.2v others at 0.2v or v cc - 0.2v ll/lle/lli - 5 50 a sl *5 sle *5 sli *5 25 - 3 10 a 40 - 3 10 a sl/sle/sli - 5 25 a notes: 1. v ih (max) = v cc + 3.0v for pulse width less than 10ns. 2. v il (min) = v ss - 3.0v for pulse width less than 10ns. 3. over/undershoot specifications are characterized, not 100% tested. 4. typical values are included for reference only and are not guaranteed or tested. typical values are measured at v cc = v cc (typ.) and t a = 25 5. this parameter is measured at v cc = 3.0v
ly6225616 rev. 1.5 256k x 16 bit low power cmos sram lyontek inc. reserves the rights to change the specificati ons and products without notice. 5f, no. 2, industry e. rd. ix, science-ba sed industrial park, hsinchu 300, taiwan. tel: 886-3-6668838 fax: 886-3-6668836 5 ? capacitance (t a = 25 , f = 1.0mhz) parameter symbol min. ma x unit input capacitance c in - 6 pf input/output capacitance c i/o - 8 pf note : these parameters are guaranteed by devic e characterization, but not production tested. ac test conditions input pulse levels 0.2v to v cc -0.2v input rise and fall times 3ns input and output timing reference levels 1.5v output load c l = 30pf + 1ttl, i oh / i ol = -2ma/4m a ac electrical characteristics (1) read cycle parameter sym. ly6225616-45 ly6225616-55 ly6225616-70 unit min. max. min. max. min. max. read cycle time t rc 45 - 55 - 70 - ns a ddress access time t aa - 45 - 55 - 70 ns chip enable access time t ace - 45 - 55 - 70 ns output enable access time t oe - 25 - 30 - 35 ns chip enable to output in low-z t clz * 10 - 10 - 10 - ns output enable to output in low-z t olz * 5 - 5 - 5 - ns chip disable to output in high-z t chz * - 15 - 20 - 25 ns output disable to output in high-z t ohz * - 15 - 20 - 25 ns output hold from address change t oh 10 - 10 - 10 - ns lb#, ub# a ccess time t ba - 45 - 55 - 70 ns lb#, ub# to high-z output t bhz * - 20 - 25 - 30 ns lb#, ub# to low-z output t blz * 10 - 10 - 10 - ns (2) write cycle parameter sym. ly6225616-45 ly6225616-55 ly6225616-70 unit min. max. min. max. min. max. write cycle time t wc 45 - 55 - 70 - ns a ddress valid to end of write t aw 40 - 50 - 60 - ns chip enable to end of write t cw 40 - 50 - 60 - ns a ddress set-up time t as 0-0-0 - ns write pulse width t wp 35 - 45 - 55 - ns write recovery time t wr 0-0-0 - ns data to write time overlap t dw 20 - 25 - 30 - ns data hold from end of write time t dh 0-0-0 - ns output active from end of write t ow * 5-5-5 - ns write to output in high-z t whz * - 15 - 20 - 25 ns lb#, ub# valid to end of write t bw 35 - 50 - 60 - ns *these parameters are guaranteed by device characterization, but not production tested.
ly6225616 rev. 1.5 256k x 16 bit low power cmos sram lyontek inc. reserves the rights to change the specificati ons and products without notice. 5f, no. 2, industry e. rd. ix, science-ba sed industrial park, hsinchu 300, taiwan. tel: 886-3-6668838 fax: 886-3-6668836 6 ? timing waveforms read cycle 1 (address controlled) (1,2) dout data valid t oh t aa address t rc previous data valid read cycle 2 (ce# and oe# controlled) (1,3,4,5) dout data valid high-z high-z t clz t olz t chz t ohz t oh oe# t oe lb#,ub# t bhz t ace ce# t aa address t rc t ba t blz notes : 1.we#is high for read cycle. 2.device is continuously selected oe# = low, ce# = low, lb# or ub# = low . 3.address must be valid prior to or coincident with ce# = low, lb# or ub# = low transition; otherwise t aa is the limiting parameter. 4.t clz , t blz, t olz , t chz, t bhz and t ohz are specified with c l = 5pf. transition is measured 500mv from steady state. 5.at any given temperature and voltage condition, t chz is less than t clz , t bhz is less than t blz , t ohz is less than t olz.
ly6225616 rev. 1.5 256k x 16 bit low power cmos sram lyontek inc. reserves the rights to change the specificati ons and products without notice. 5f, no. 2, industry e. rd. ix, science-ba sed industrial park, hsinchu 300, taiwan. tel: 886-3-6668838 fax: 886-3-6668836 7 ? write cycle 1 (we# controlled) (1,2,3,5,6) dout din data valid t dw t dh (4) high-z t whz we# t wp t cw t wr t as (4) t ow lb#,ub# ce# t aw address t wc t bw write cycle 2 (ce# controlled) (1,2,5,6) dout din data valid t dw t dh (4) high-z t whz we# lb#,ub# t cw ce# address t wr t as t aw t wc t wp t bw
ly6225616 rev. 1.5 256k x 16 bit low power cmos sram lyontek inc. reserves the rights to change the specificati ons and products without notice. 5f, no. 2, industry e. rd. ix, science-ba sed industrial park, hsinchu 300, taiwan. tel: 886-3-6668838 fax: 886-3-6668836 8 ? write cycle 3 (lb# ,ub# controlled) (1,2,5,6) dout din data valid t dw t dh (4) high-z t whz we# lb#,ub# t cw ce# address t wr t as t aw t wc t wp t bw notes : 1.we#,ce#, lb#, ub# must be high during all address transitions. 2.a write occurs during the overlap of a low ce#, low we#, lb# or ub# = low. 3.during a we# controlled write cycle with oe# low, t wp must be greater than t whz + t dw to allow the drivers to turn off and data to be placed on the bus. 4.during this period, i/o pins are in the out put state, and input signals must not be applied. 5.if the ce#, lb#, ub# low transition occurs simultaneously with or after we# low transition, the outputs remain in a high impe dance state. 6.t ow and t whz are specified with c l = 5pf. transition is measured 500mv from steady state.
ly6225616 rev. 1.5 256k x 16 bit low power cmos sram lyontek inc. reserves the rights to change the specificati ons and products without notice. 5f, no. 2, industry e. rd. ix, science-ba sed industrial park, hsinchu 300, taiwan. tel: 886-3-6668838 fax: 886-3-6668836 9 ? data retention characteristics parameter symbo l test condition min. typ. max. unit v cc for data retention v dr ce# v R cc - 0.2v 1.5 - 5.5 v data retention current i dr v cc = 1.5v ce# v R cc - 0.2v other pins at 0.2v or v cc -0.2v ll - 2 30 a sl 25 - 2 8 a 40 - 2 8 a sl - 2 23 a chip disable to data retention time t cdr see data retention waveforms (below) 0 - - ns recovery time t r t rc * - - ns t rc * = read cycle time data retention waveform low vcc data retention waveform (1) (ce# controlled) vcc ce# v dr R 1.5v ce# v R cc-0.2v vcc(min.) v ih t r t cdr v ih vcc(min.) low vcc data retention waveform (2) (lb#, ub# controlled) vcc lb#,ub# v dr R 1.5v lb#,ub# v R cc-0.2v vcc(min.) v ih t r t cdr v ih vcc(min.)
ly6225616 rev. 1.5 256k x 16 bit low power cmos sram lyontek inc. reserves the rights to change the specificati ons and products without notice. 5f, no. 2, industry e. rd. ix, science-ba sed industrial park, hsinchu 300, taiwan. tel: 886-3-6668838 fax: 886-3-6668836 10 ? package outline dimension 44-pin 400mil tsop- package outline dimension symbols dimensions in millmeters dimensions in mils min. nom. max. min. nom. max. a - - 1.20 - - 47.2 a1 0.05 0.10 0. 15 2.0 3.9 5.9 a2 0.95 1.00 1. 05 37.4 39.4 41.3 b 0.30 - 0.45 11.8 - 17.7 c 0.12 - 0.21 4.7 - 8.3 d 18.212 18.415 18.618 717 725 733 e 11.506 11.760 12.014 453 463 473 e1 9.957 10.160 10.363 392 400 408 e - 0.800 - - 31.5 - l 0.40 0.50 0. 60 15.7 19.7 23.6 zd - 0.805 - - 31.7 - y - - 0.076 - - 3 0 o 3 o 6 o 0 o 3 o 6 o
ly6225616 rev. 1.5 256k x 16 bit low power cmos sram lyontek inc. reserves the rights to change the specificati ons and products without notice. 5f, no. 2, industry e. rd. ix, science-ba sed industrial park, hsinchu 300, taiwan. tel: 886-3-6668838 fax: 886-3-6668836 11 ? 48-ball 6mm 8mm tfbga package outline dimension
ly6225616 rev. 1.5 256k x 16 bit low power cmos sram lyontek inc. reserves the rights to change the specificati ons and products without notice. 5f, no. 2, industry e. rd. ix, science-ba sed industrial park, hsinchu 300, taiwan. tel: 886-3-6668838 fax: 886-3-6668836 12 ? ordering information
ly6225616 rev. 1.5 256k x 16 bit low power cmos sram lyontek inc. reserves the rights to change the specificati ons and products without notice. 5f, no. 2, industry e. rd. ix, science-ba sed industrial park, hsinchu 300, taiwan. tel: 886-3-6668838 fax: 886-3-6668836 13 ? this page is left blank intentionally.

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