EDI8F32259C15MMC WEDC [White Electronic Designs Corporation], EDI8F32259C15MMC Datasheet
EDI8F32259C15MMC
Manufacturer Part Number
EDI8F32259C15MMC
Description
256Kx32 STATIC RAM CMOS, HIGH SPEED MODULE
Manufacturer
WEDC [White Electronic Designs Corporation]
Datasheet
1.EDI8F32259C15MMC.pdf
(8 pages)
256Kx32 STATIC RAM CMOS, HIGH SPEED MODULE
White Electronic Designs Corp. reserves the right to change products or specifi cations without notice.
August 2006
Rev. 3
FEATURES
FIG. 1 PIN CONFIGURATIONS AND BLOCK DIAGRAM
256Kx32 bit CMOS Static RAM
High Density Package with JEDEC Standard
Pinouts
Single +5V (±10%) Supply Operation
Access Times: 15, 20, and 25ns
Individual Byte Selects
Fully Static, No Clocks
TTL Compatible I/O
72 Pin SIMM No. 175 (Angle)
72 Pin ZIP No. 176
72 Pin SIMM, No. 354 (Straight)
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
DQ0
DQ8
DQ1
DQ9
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
PD3
PD4
PD1
PD2
A15
A14
E2#
E1#
V
W#
NC
NC
V
V
A0
A7
A1
A8
A2
A9
White Electronic Designs
SS
CC
SS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
PD 1,2 = V
PD 3,4 = Open
DQ24
DQ16
DQ25
DQ17
DQ26
DQ18
DQ27
DQ19
DQ20
DQ28
DQ21
DQ29
DQ22
DQ30
DQ23
DQ31
E4#
E3#
A17
A16
A10
A11
A12
A13
V
V
V
NC
NC
NC
NC
G#
A3
A4
A5
A6
SS
CC
SS
SS
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
1
DESCRIPTION
The EDI8F32259C 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 (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 EDI8F32259C 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 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 four PD (Presence
Detect) pins which are used to identify module memory
density in applications where alternate modules can be
interchanged.
A0 - A17
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
E0#
E1#
E2#
E3#
W#
G#
AØ-A17
EØ#-E3#
W#
G#
DQØ-DQ31 Common Data Input/Output
V
V
CC
SS
256K
256K
256K
256K
X 4
X 4
X 4
X 4
PIN NAMES
Address Inputs
Chip Enables
Write Enables
Output Enable
Power (+5V±10%)
Ground
DQ0 - DQ3
DQ8 - DQ11
DQ16 - DQ19
DQ24 - DQ27
EDI8F32259C
256K
256K
256K
256K
X 4
X 4
X 4
X 4
DQ4 - DQ7
DQ12 - DQ15
DQ20 - DQ23
DQ28 - DQ31
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