EDI8F32128C
White Electronic Designs
128KX32 STATIC RAM CMOS, HIGH SPEED MODULE
FEATURES
DESCRIPTION
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.
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128Kx32 bit CMOS Static
Random Access Memory
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Access Times: 15, 20, and 25ns
Individual Byte Selects
Fully Static, No Clocks
TTL Compatible I/O
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.
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Single +5V ( 10ꢀ) Supply Operation
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.
High Density Package with JEDEC Standard
Pinouts
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64 Pin ZIP, No. 85
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.
• Height: 13.97 (0.550")
64 Lead SIMM, No. 333
• Height: 15.62 (0.615")
Common Data Inputs and Outputs
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.
FIG. 1 – PIN CONFIGURATIONS AND BLOCK DIAGRAM
PIN NAMES
1
3
5
7
9
VSS
AØ-A16
EØ#-E3#
W#
Address Inputs
Chip Enables
Write Enables
Output Enable
PD0
DQ0
DQ1
DQ2
2
4
6
8
PD1
DQ8
DQ9
DQ10
DQ3 10
12
11 DQ11
13 A0
15 A1
17 A2
G#
VCC
A7 14
A8 16
DQØ-DQ31 Common Data Input/Output
A9 18
VCC
VSS
Power (+5V 1ꢀ0%
Ground
19 DQ12
21 DQ13
23 DQ14
25 DQ15
DQ4 20
DQ5 22
DQ6 24
DQ7 26
W# 28
A14 30
E0# 32
27
VSS
29 A15
31 E1#
BLOCK DIAGRAM
A0 - A17
33 E3#
35 NC
E2# 34
A16 36
W#
G#
37 G#
V
SS 38
39 DQ24
41 DQ25
43 DQ26
45 DQ27
47 A3
49 A4
51 A5
DQ16 40
DQ17 42
DQ18 44
DQ19 46
A10 48
128Kx8
128Kx8
128Kx8
128Kx8
DQ0-7
E0#
E1#
E2#
E3#
DQ8-15
DQ16-23
A11 50
A12 52
53
V
CC
A13 54
55 A6
DQ20 56
DQ21 58
DQ22 60
DQ23 62
57 DQ28
59 DQ29
61 DQ30
63 DQ31
V
SS 64
DQ24-31
PD0 = OPEN
PD1 = OPEN
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
May 2006
Rev. 1
1
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com