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White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com

White Electronic Designs

EDI8F32128C

May 2006

Rev. 1

White Electronic Designs Corp. reserves the right to change products or specifications without notice.

128KX32 STATIC RAM CMOS, HIGH SPEED MODULE

The EDI8F32128C is a high speed 4Mb Static RAM

module organized as 128K words by 32 bits. This module is

constructed from four 128Kx8 Static RAMs in SOJ packages

on an epoxy laminate (FR4) board.

Four chip enables (E0# - 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 EDI8F32128C is offered in 64 pin ZIP/SIMM package

which enables eight megabits of memory to be placed in

less than 1.4 square inches of 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 provides equal access

and cycle times for ease of use.

The ZIP and SIMM modules contain two pins, PD1

and PD2, which are used to identify module memory

density in applications where alternate modules can be

interchanged.

FEATURES

128Kx32 bit CMOS Static

Random Access Memory

Access Times: 15, 20, and 25ns

Individual Byte Selects

Fully Static, No Clocks

TTL Compatible I/O

Single +5V (±10%) Supply Operation

High Density Package with JEDEC Standard

Pinouts

64 Pin ZIP, No. 85

• Height: 13.97 (0.550")

64 Lead SIMM, No. 333

• Height: 15.62 (0.615")

Common Data Inputs and Outputs

PIN NAMES

FIG. 1 – PIN CONFIGURATIONS AND BLOCK DIAGRAM

AØ-A16

Address Inputs

EØ#-E3#

Chip Enables

W#

Write Enables

G#

Output Enable

DQØ-DQ31 Common Data Input/Output

Power (+5V ± 10%)

Ground

DESCRIPTION

PD0

DQ0

DQ1

DQ2

DQ3

A7

A8

A9

DQ4

DQ5

DQ6

DQ7

W#

A14

E0#

PD1

DQ8

DQ9

DQ10

DQ11

A0

A1

A2

DQ12

DQ13

DQ14

DQ15

A15

E1#

E3#

NC

G#

DQ24

DQ25

DQ26

DQ27

A3

A4

A5

A6

DQ28

DQ29

DQ30

DQ31

E2#

A16

DQ16

DQ17

DQ18

DQ19

A10

A11

A12

A13

DQ20

DQ21

DQ22

DQ23

PD0 = OPEN

PD1 = OPEN

34

36

38

40

42

44

46

48

50

52

54

56

58

60

62

64

33

35

37

39

41

43

45

47

49

51

53

55

57

59

61

63

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

1

3

5

7

9

11

13

15

17

19

21

23

25

27

29

31

DQ0-7

DQ8-15

DQ16-23

DQ24-31

A0 - A17

W#

G#

E0#

E3#

E2#

E1#

128Kx8

128Kx8

128Kx8

128Kx8

BLOCK DIAGRAM