1 white electronic designs corporation ? (602) 437-1520 ? www.whiteedc.com white electronic designs ws1m8-xcx november 2002 rev. 2 preliminary* white electronic designs corp. reserves the right to change products or speci cations without notice. 2x512kx8 dualithic? sram features ? access times 70, 85, 100ns ? evolutionary, corner power/ground pinout ? packaging: ? 32 pin, hermetic ceramic dip (package 300) ? organized as two banks of 512kx8 ? commercial, industrial and military temperature ranges ? 5 volt power supply ? low power cmos ? ttl compatible inputs and outputs ? output enable internally tied to gnd. * this product is under development, is not quali ed or characterized and is subject to change without notice. note: 1. cs1# and cs2# are used to select the lower and upper 512kx8 of the device. cs1# and cs2# must not be enabled at the same time. 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 a18 a16 a14 a12 a7 a6 a5 a4 a3 a2 a1 a0 i/o0 i/o1 i/o2 gnd v cc a15 a17 we# a13 a8 a9 a11 cs2# a10 cs1# i/o7 i/o6 i/o5 i/o4 i/o3 pin con guration for ws1m8-xcx 32 dip top view block diagram a 0-18 we# 512k x 8 512k x 8 cs 1# cs 2# i/o 0-7 (1) (1) pin description a0-18 address inputs i/o0-7 data input/output cs1-2# chip selects we# write enable v cc +5.0v power supply gnd ground
2 white electronic designs corporation ? (602) 437-1520 ? www.whiteedc.com white electronic designs ws1m8-xcx november 2002 rev. 2 preliminary white electronic designs corp. reserves the right to change products or speci cations without notice. absolute maximum ratings parameter symbol min max unit operating temperature t a -55 +125 c storage temperature t stg -65 +150 c signal voltage relative to gnd v g -0.5 v cc +0.5 v junction temperature t j 150 c supply voltage v cc -0.5 7.0 v recommended operating conditions parameter symbol min max unit supply voltage v cc 4.5 5.5 v input high voltage v ih 2.2 v cc + 0.3 v input low voltage v il -0.3 +0.8 v opertating temp. (mil) t a -55 +125 c truth table cs# we# mode data i/o power h x standby high z standby l h read data out active l l write data in active capacitance t a = +25c parameter symbol conditions max unit input capacitance c in v in = 0v, f = 1.0 mhz 28 pf output capacitance c out v out = 0v, f = 1.0 mhz 28 pf this parameter is guaranteed by design but not tested. dc characteristics v cc = 5.0v, v ss = 0v, -55c t a +125c parameter sym conditions min max units input leakage current i li v cc = 5.5, v in = gnd to v cc 10 a output leakage current i lo 1 cs# = v ih , v out = gnd to v cc 10 a operating supply current i cc 1 cs# = v il , f = 5mhz, v cc = 5.5 55 ma standby current i sb 1 cs# = v ih , f = 5mhz, v cc = 5.5 2 ma output low voltage v ol i ol = 2.1ma 0.4 v output high voltage v oh i oh = -1.0ma 2.4 v note: dc test conditions: v ih = v cc -0.3v, v il = 0.3v 1. oe# is internally tied to gnd. data retention characteristics -55c t a +125c characteristic sym conditions min typ max units data retention supply voltage v dr cs# v cc -0.2v 2.0 5.5 v data retention current i ccdr1 v cc = 3v 150 800* a * also available in low power version. please call factory for informaion.
3 white electronic designs corporation ? (602) 437-1520 ? www.whiteedc.com white electronic designs ws1m8-xcx november 2002 rev. 2 preliminary white electronic designs corp. reserves the right to change products or speci cations without notice. i current source d.u.t. c = 50 pf eff i ol v 1.5v (bipolar supply) z current source oh ac characteristics v cc = 5.0v, gnd = 0v, -55c t a +125c parameter write cycle symbol -70 -85 -100 units min max min max min max write cycle time t wc 70 85 100 ns chip select to end of write t cw 60 75 80 ns address valid to end of write t aw 60 75 80 ns data valid to end of write t dw 30 30 40 ns write pulse width t wp 50 50 60 ns address setup time t as 000ns address hold time t ah 555ns output active from end of write t ow 1 555ns write enable to output in high z t whz 1 25 25 35 ns data hold time t dh 000ns 1. this parameter is guaranteed by design but not tested. ac characteristics v cc = 5.0v, gnd = 0v, -55c t a +125c parameter read cycle symbol -70 -85 -100 units min max min max min max read cycle time t rc 70 85 100 ns address access time t aa 70 85 100 ns output hold from address change t oh 000ns chip select access time t acs 70 85 100 ns chip select to output in low z t clz 1 555ns chip disable to output in high z t chz 1 25 25 25 ns 1. this parameter is guaranteed by design but not tested. ac test circuit notes: v z is programmable from -2v to +7v. i ol & i oh programmable from 0 to 16ma. tester impedance z0 = 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. ac test conditions parameter typ 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
4 white electronic designs corporation ? (602) 437-1520 ? www.whiteedc.com white electronic designs ws1m8-xcx november 2002 rev. 2 preliminary white electronic designs corp. reserves the right to change products or speci cations without notice. write cycle ? cs# controlled write cycle ? we# controlled address data i/o write cycle 1, we# controlled t aw t cw t ah t wp t dw t whz t as t ow t dh t wc data valid cs# we# address data i/o write cycle 2, cs# controlled t aw t as t cw t ah t wp t dh t dw t wc cs# we# data valid timing waveform ? read cycle address data i/o read cycle 2 (we# = v ih ) t aa t acs t clz t rc data valid high impedance cs# t chz address data i/o read cycle 1 (cs# = v il , we# = v ih ) t aa t oh t rc data valid previous data valid note: oe# is internally tied to gnd.
5 white electronic designs corporation ? (602) 437-1520 ? www.whiteedc.com white electronic designs ws1m8-xcx november 2002 rev. 2 preliminary white electronic designs corp. reserves the right to change products or speci cations without notice. 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 ordering information lead finish: blank = gold plated leads a = solder dip leads device grade: m = military screened -55c to +125c i = industrial -40c to +85c c = commercial 0c to +70c package: c = ceramic 0.600" dip (package 300) access time (ns) organization, two banks of 512k x 8 sram white electronic designs corp. w s 1m8 - xxx c x x
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