ws1m8v-xcx 1 white electronic designs corporation ? (602) 437-1520 ? www.wedc.com white electronic designs october, 2002 rev. 2 white electronic designs corp. reserves the right to change products or speci? cations without notice. advanced* 2x512kx8 dualithic? sram features access times 17, 20, 25, 35, 45, 55ns 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 3.3v 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 or cancellation without notice. note: 1. cs# 1 and cs# 2 are used to select the lower and upper 512kx8 of the device. cs# 1 and cs# 2 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 configuration for ws1m8v-xcx 32 dip top view block diagram 512k x 8 512k x 8 a0-18 we# cs 1# cs 2# i/o0-7 (1) (1) a0-18 address inputs i/o0-7 data input/output cs#1-2 chip selects we# write enable v cc +3.3v power supply gnd ground pin description
ws1m8v-xcx 2 white electronic designs corporation ? (602) 437-1520 ? www.wedc.com white electronic designs october, 2002 rev. 2 white electronic designs corp. reserves the right to change products or speci? cations without notice. advanced* 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 +4.6 v junction temperature t j 150 c supply voltage v cc -0.5 5.5 v 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 note: oe# is internally tied to gnd. capacitance t a = +25c parameter symbol condition max unit input capacitance c in v in = 0v, f = 1.0mhz 28 pf output capicitance c out v out = 0v, f = 1.0mhz 28 pf this parameter is guaranteed by design but not tested. recommended operating conditions parameter symbol min max unit supply voltage v cc 3.0 3.6 v input high voltage v ih 2.2 v cc + 0.3 v input low voltage v il -0.3 +0.8 v operating temp. (mil.) t a -55 +125 c dc characteristics v cc = 3.3v, gnd = 0v, -55c t a +125c) parameter sym conditions min max units input leakage current i li v cc = 3.6, 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 = 3.6 160 ma standby current i sb 1 cs# = v ih , f = 5mhz, v cc = 3.6 30 ma output low voltage v ol i ol = 8.0ma 0.4 v output high voltage v oh i oh = -4.0ma 2.4 v note: dc test conditions: v ih = v cc -0.3v , v il = 0.3v 1. oe# is internally tied to gnd.
ws1m8v-xcx 3 white electronic designs corporation ? (602) 437-1520 ? www.wedc.com white electronic designs october, 2002 rev. 2 white electronic designs corp. reserves the right to change products or speci? cations without notice. advanced* ac characteristics v cc = 3.3v, gnd = 0v, -55c t a +125c) parameter symbol -17 -20 -25 -35 -45 -55 units read cycle min max min max min max min max min max min max read cycle time t rc 17 20 25 35 45 55 ns address access time t aa 17 20 25 35 45 55 ns output hold from address change t oh 000000ns chip select access time t acs 17 20 25 35 45 55 ns chip select to output in low z t clz 1 222444ns chip disable to output in high z t chz 1 9 1012152020ns notes: 1. this parameter is guaranteed by design but not tested. 2. oe# is internally tied to gnd. ac characteristics v cc = 3.3v, gnd = 0v, -55c t a +125c) parameter symbol -17 -20 -25 -35 -45 -55 units write cycle min max min max min max min max min max min max write cycle time t wc 17 20 25 35 45 55 ns chip select to end of write t cw 14 14 15 25 35 50 ns address valid to end of write t aw 14 14 15 25 35 50 ns data valid to end of write t dw 9 1010202525 ns write pulse width t wp 14 14 15 25 35 40 ns address setup time t as 000000ns address hold time t ah 000055ns output active from end of write t ow 1 234455ns write enable to output in high z t whz 1 9 9 10 15 15 25 ns data hold time t dh 000000ns notes: 1. this parameter is guaranteed by design but not tested. i current source d.u.t. c = 50 pf eff i ol v 1.5v (bipolar supply) z current source oh ac test circuit 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 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 cir cuit. ate tester includes jig capacitance.
ws1m8v-xcx 4 white electronic designs corporation ? (602) 437-1520 ? www.wedc.com white electronic designs october, 2002 rev. 2 white electronic designs corp. reserves the right to change products or speci? cations without notice. advanced* timing waveform C read cycle write cycle C cs# controlled 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 address data i/o read cycle 2 (we# = v ih ) t aa t acs t oe t clz t olz t ohz t rc data valid high impedance cs# oe# t chz address data i/o read cycle 1 (cs# = oe# = v il , we# = v ih ) t aa t oh t rc data valid previous data valid note: oe# is internally tied to the gnd. write cycle C we# con trolled address cs# we# t as t wp t cw t aw t wc t ah t ow t dh data valid t dw t whz data i/o write cycle 1, we# controlled
ws1m8v-xcx 5 white electronic designs corporation ? (602) 437-1520 ? www.wedc.com white electronic designs october, 2002 rev. 2 white electronic designs corp. reserves the right to change products or speci? cations without notice. advanced* ordering information 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 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 = 32 pin ceramic 0.600" dip (package 300) access time (ns) low voltage supply 3.3v 10% organization, two banks of 512k x 8 sram white electronic designs corp. w s 1m8 v - xxx c x x
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