edi9f37512c 512kx37 sram module 1 edi9f37512c rev. 3 4/98 eco #9755 a?-a18 address inputs e chip enables w0-w3 write enable aw parity write enable g output enable dq?-dq31 common data input/output vcc power (+5v10%) vss ground pd0-pd1 presence detect features 512kx37 bit cmos static random access memory ? access times: 45 and 55 ns ? individual byte selects ? fully static, no clocks ? ttl compatible i/o high density package ? 72 lead simm, no. 418 ? common data inputs and outputs single +5v (10%) supply operation the edi9f37512c is a high speed 20 megabit static ram module organized as 512k words x 37 bits. this module is constructed from five 512kx8 static rams in tsop packages on an epoxy laminate (fr4) board. four write selects (w0-w3) are used to independently enable the four bytes. reading and writing can be executed on individual bytes or any combination of multiple bytes through proper use of selects. the edi9f37512c is offered in a 72 lead simm which allows 20 megabits of memory to be placed in less than 1.5 square inch or board space. all inputs and outputs are ttl compatible and operate from a single 5v supply. fully asynchronous circuitry requires no clocks or refreshing for operation and pro- vides equal access and cycle times for ease of use. the simm module contains two presence detect pins which are used to identify module memory density in applications where alternate modules can be inter- changed. pin configurations and block diagram pin names 512kx37 static ram cmos, high speed module electronic designs incorporated ? one research drive ? westborough, ma 01581 usa ? 508-366-5151 ? fax 508-836-4850 ? http://www.electronic-designs.com 32 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 33 34 35 36 dq1 dq3 dq8 dq9 dq2 dq10 dq11 vcc dq4 dq13 dq5 dq14 dq6 dq15 dq7 vss ad3 ad4 ad1 ad2 vss ad0 dq0 a1 a3 a5 a7 w0 aw a0 a2 a4 dq12 a6 w1 e 1 2 3 4 5 6 7 8 9 vss dq24 dq16 dq25 dq17 dq26 dq18 dq27 dq19 vcc dq20 dq28 dq21 dq29 dq22 vss dq30 dq23 dq31 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 54 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 52 53 55 w3 w2 nc pd1 pd0 a10 a11 a12 a13 a14 a15 a16 a18 a17 a8 a9 g dq0-dq7 dq8-dq15 dq16-dq23 dq24-dq31 w0 w1 w2 w3 aw ad0-ad4 a0-a18 g e
2 edi9f37512c rev. 3 4/98 eco #9755 edi9f37512c 512kx37 sram module ac characteristics read cycle symbo 45ns 55ns parameter jedec alt. min max min max units read cycle time tavav trc 45 55 ns address access time tavqv taa 45 55 ns chip enable access telqv tacs 45 55 ns chip enable to output in low z (1) telqx tclz 3 3 ns chip disable to output in high z (1) tehqz tchz 18 25 ns output hold from address change tavqx toh 3 3 ns output enable to output valid tglqv toe 15 25 ns output enable to output in low z (1) tglqx tolz 0 0 ns output disable to output in high z(1) tghqz tohz 15 15 ns read cycle 2 - w high read cycle 1 - w high, g, e low notes: 1. parameter guaranteed, but not tested. tghqz telqv telqx e g q tehqz a tglqv tglqx tavqv tavav tavqv tavqx data 2 a q address 1 address 2 data 1
edi9f37512c 512kx37 sram module 3 edi9f37512c rev. 3 4/98 eco #9755 notes: 1. parameter guaranteed, but not tested. symbol 45ns 55ns parameter jedec alt. min max min max units write cycle time tavav twc 45 55 ns chip enable to end of write telwh tcw 25 45 ns twleh tcw 25 45 ns address setup time tavwl tas 0 0 ns tavel tas 0 0 ns address valid to end of write tavwh taw 25 45 ns taveh taw 25 45 ns write pulse width twlwh twp 25 40 ns teleh twp 25 40 ns write recovery time twhax twr 0 0 ns tehax twr 0 0 ns data hold time twhdx tdh 0 0 ns tehdx tdh 0 0 ns write to output in high z (1) twlqz twhz 0 6 0 28 ns data to write time tdvwh tdw 20 30 ns tdveh tdw 20 30 ns output active from end of write (1) twhqx twlz 3 3 ns ac characteristics write cycle write cycle 2 - e controlled a w e d q tavav tavel tehax tdveh tehdx teleh taveh data valid high z twleh
4 edi9f37512c rev. 3 4/98 eco #9755 edi9f37512c 512kx37 sram module electronic designs incorporated ? one research drive ? westborough, ma 01581usa ? 508-366-5151 ? fax 508-836-4850 ? http://www.electronic-designs.com electronic designs inc. reserves the right to change specifications without notice. cage no. 66301 package description part number speed package (ns) no. edi9f37512c45mmc 45 418 edi9f37512c55mmc 55 418 ordering information package no. 418 72 pin zip .250 .050 typ. .125 dia. typ. (2 plcs.) max. 3.984 4.255 max. .130 ref. .060 r. 3.750 .400 .250 .080 .220 min. .720 max. .300 .133 ref. ref. p1
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