1 white electronic designs corporation ? (508) 366-5151 ? www.whiteedc.com edi8f32259v aug. 2001 rev. 0 eco #14563 the edi8f32259v is a high speed 8mb static ram module organized as 256k words by 32 bits. this module is constructed from eight 256kx4 static rams in soj packages on an epoxy laminate (fr4) board. four chip enables (e?-e3) are used to independently enable the four bytes. reading or writing can be executed on individual bytes or any combination of multiple bytes through proper use of selects. the edi8f32259v is offered in 72 pin zip/simm package which enables eight megabits of memory to be placed in less than 1.3 square inches of board space. all inputs and outputs are ttl compatible and operate from a single 3.3v supply. fully asynchronous circuitry requires no clocks or refreshing for operation and provides equal access and cycle times for ease of use. the zip and simm modules contain four pd (presence detect) pins which are used to identify module memory density in appli- cations where alternate modules can be interchanged. features ? 256kx32 bit cmos static ram ? access times: 12, 15, 20, and 25ns ? individual byte selects ? fully static, no clocks ? ttl compatible i/o ? high density package with jedec standard pinouts ? 72 pin simm no. 175 (angle) ? 72 pin zip no. 176 ? 72 pin simm, no. 354 (straight) ? single +3.3v (10%) supply operation pin names pin configurations and block diagram 256kx32 static ram cmos, high speed module description fig. 1 pd 1,2 = vss pd 3,4 = open 0 a?-a17 address inputs e?-e3 chip enables w, write enables g output enable dq?-dq31 common data input/output vcc power (3.3v10%) vss ground
2 white electronic designs corporation ? (508) 366-5151 ? www.whiteedc.com edi8f32259v aug. 2001 rev. 0 eco #14563 absolute maximum ratings* recommended dc operating conditions these parameters are sampled, not 100% tested. ac test conditions *stress 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 greater than those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability. (note: for tehqz,tghqz and twlqz, cl = 5pf) truth table capacitance dc electrical characteristics parameter sym min typ max units supply voltage vcc 3.0 3.3 3.6 v supply voltage vss 0 0 0 v input high voltage vih 2.2 -- vcc+0.3v v input low voltage vil -0.3 -- 0.8 v input pulse levels vss to 3.0v input rise and fall times 5ns input and output timing levels 1.5v output load 1ttl, cl = 30pf e w g mode output power h x x standby high z icc3 l h l read dout icc1 l l x write din icc1 l h h output deselect high z icc1 parameter sym max unit address lines ci 60 pf data lines cd/q 20 pf chip enable line cc 20 pf write control line cn 60 pf (f=1.0mhz, vin=vcc or vss) parameter sym conditions min max units 12-25 ns operating power supply current icc1 w, e = vil, ii/o = 0ma, min cycle 800 ma standby (ttl) power supply current icc2 e 3 vih, vin vil or vin 3 vih 240 ma full standby power supply current icc3 e 3 vcc-0.2v 40 ma cmos vin 3 vcc-0.2v or vin 0.2v input leakage current ili vin = 0v to vcc -- 80 a output leakage current ilo v i/o = 0v to vcc -- 20 a output high voltage voh ioh = -4.0ma 2.4 ? v output low voltage vol iol = 8.0ma ? 0.4 v voltage on any pin relative to vss -0.5v to 4.6v operating temperature ta (ambient) commercial 0c to +70c storage temperature, plastic -55c to +125c power dissipation 2.5 watts output current 20 ma
3 white electronic designs corporation ? (508) 366-5151 ? www.whiteedc.com edi8f32259v aug. 2001 rev. 0 eco #14563 ac characteristics read cycle read cycle 2 - w high note 1: parameter guaranteed, but not tested. read cycle 1 - w high, g, e low symbol 12ns 15ns 20ns 25ns parameter jedec alt. min max min max min max min max units read cycle time t avav trc 12 15 20 25 ns address access time tavqv taa 12 15 20 25 ns chip enable access telqv tacs 12 15 20 25 ns chip enable to output in low z (1) telqx tclz 3 3 3 3 ns chip disable to output in high z (1) tehqz tchz 6 7 9 9 ns output hold from address change tavqx toh 3 3 3 3 ns output enable to output valid tglqv toe 6 7 9 9 ns output enable to output in low z (1) tglqx tolz 0 0 0 0 ns output disable to output in high z (1) tghqz tohz 6 7 9 9 ns fig. 2 fig. 3 address 1 address 2 tavav data 1 data 2 tavqv tavqx a q tghqz telqv telqx e g q tehqz a tavav tglqv tglqx tavqv
4 white electronic designs corporation ? (508) 366-5151 ? www.whiteedc.com edi8f32259v aug. 2001 rev. 0 eco #14563 ac characteristics write cycle note 1: parameter guaranteed, but not tested. symbol 12ns 15ns 20ns 25ns parameter jedec alt. min max min max min max min max units write cycle time t avav twc 12 15 20 25 ns chip enable to end of write telwh tcw 8 9 10 10 ns twleh tcw 8 9 10 10 ns address setup time tavwl tas 0 0 0 0 ns tavel tas 0 0 0 0 ns address valid to end of write tavwh taw 8 9 10 10 ns taveh taw 8 9 10 10 ns write pulse width twlwh twp 8 9 10 10 ns teleh twp 8 9 10 10 ns write recovery time twhax twr 0 0 0 0 ns tehax twr 0 0 0 0 ns data hold time twhdx tdh 3 3 3 3 ns tehdx tdh 3 3 3 3 ns write to output in high z (1) twlqz twhz 0 6 0 7 0 9 0 9 ns data to write time tdvwh tdw 6 7 8 8 ns tdveh tdw 6 7 8 8 ns output active from end of write (1) twhqx twlz 3 3 3 3 ns
5 white electronic designs corporation ? (508) 366-5151 ? www.whiteedc.com edi8f32259v aug. 2001 rev. 0 eco #14563 write cycle 1 - w controlled write cycle 2 - e controlled e a tavav telwh tavwh twlwh tavwl twhax w high z data valid twlqz twhqx tdvwh twhdx q d a tavel high z tavav teleh e taveh tehax w twleh tehdx tdveh q data valid d
6 white electronic designs corporation ? (508) 366-5151 ? www.whiteedc.com edi8f32259v aug. 2001 rev. 0 eco #14563 ordering information note: for gold simm, change from edi8f to edi8g. package description package no. 175: 72 pin zip .360 max. .100 typ. p1 .050 .050 3.865 max. .020 .100 typ. .052 typ. .250 typ. .175 .125 .590 max. not recommended for new designs part number speed package (ns) no. edi8f32259v12mnc 12 176 edi8f32259v15mnc 15 176 edi8f32259v20mnc 20 176 edi8f32259v25mnc 25 176 edi8f32259v12mmc 12 354 edi8f32259v15mmc 15 354 edi8f32259v20mmc 20 354 edi8f32259v25mmc 25 354 edi8f32259v12mzc 12 175 edi8f32259v15mzc 15 175 EDI8F32259V20MZC 20 175 edi8f32259v25mzc 25 175
7 white electronic designs corporation ? (508) 366-5151 ? www.whiteedc.com edi8f32259v aug. 2001 rev. 0 eco #14563 package no. 176: 72 pin simm angled package no. 354: 72 pin simm straight all dimensions are in inches
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