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

EDI8F32512C

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

March 2006

Rev. 9

FEATURES

512Kx32 bit CMOS Static

Random Access Memory

Access Times: 15, 20, and 25ns

Individual Byte Selects

Fully Static, No Clocks

TTL Compatible I/O

High Density Package

72 Pin ZIP, No. 173

72 lead SIMM, No. 174 (Gold Option)

Common Data Inputs and Outputs

Single +5V (±10%) Supply Operation

Note: Consult factory for availability of:

• RoHS compliant products

• Vendor source control options

• Industrial temperature option

DESCRIPTION

The EDI8F32512C is a high speed 16 megabit Static RAM

module organized as 512K words by 32 bits. This module is

constructed from four 512Kx8 Static RAMs in SOJ packages

on an epoxy laminate (FR4) board.

Four chip enables (EØ-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 EDI8F32512C is offered in 72 pin ZIP and 72 lead SIMM

packages, which enable 16 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 5V supply. Fully asynchronous circuitry requires no

clocks or refreshing for operation and provides equal access

and cycle times for ease of use.

Pins PD1- PD4, are used to identify module memory density in

applications where alternate modules can be interchanged.

512Kx32 Static RAM CMOS, High Speed Module

Pin Configurations and Block Diagram

Pin Names

FIG. 1

NC

PD3

PD0

DQ0

DQ1

DQ2

DQ3

A7

A8

A9

DQ4

DQ5

DQ6

DQ7

W#

A14

E0#

E2#

A16

DQ16

DQ17

DQ18

DQ19

A10

A11

A12

A13

DQ20

DQ21

DQ22

DQ23

NC

NC

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

42

44

46

48

50

52

54

56

58

60

62

64

66

68

70

72

1

3

5

7

9

11

13

15

17

19

21

23

25

27

29

31

33

35

37

39

41

43

45

47

49

51

53

55

57

59

61

63

65

67

69

71

NC

PD2

PD1

DQ8

DQ9

DQ10

DQ11

A0

A1

A2

DQ12

DQ13

DQ14

DQ15

A15

E1#

E3#

A17

G#

DQ24

DQ25

DQ26

DQ27

A3

A4

A5

A6

DQ28

DQ29

DQ30

DQ31

A18

NC

8G32512C Pin Config.

PD0, PD1, PD3= OPEN

A0-A18

Address Inputs

E0#-E3#

Chip Enables

W#

Write Enable

G#

Output Enable

DQ0-DQ31

Common Data

Input/Output

Power (+5V±10%)

Ground

NC

No Connectiona

8G32512C Blk Dia.

A0-A18

W#

G#

E0#

E1#

E2#

E3#

DQ0-DQ7

DQ8-DQ15

DQ16-DQ23

DQ24-DQ31

512K

X 8

512K

X 8

512K

X 8

512K

X 8