EDI8F32259C Datasheet, PDF (1/8 Pages) White Electronic Designs Corporation – 256Kx32 STATIC RAM CMOS, HIGH SPEED MODULE

White Electronic Designs
EDI8F32259C
256Kx32 STATIC RAM CMOS, HIGH SPEED MODULE
FEATURES
„ 256Kx32 bit CMOS Static RAM
„ Access Times: 15, 20, and 25ns
„ Individual Byte Selects
„ Fully Static, No Clocks
„ TTL Compatible I/O
„ High Density Package with JEDEC Standard
Pinouts
„ 72 Pin SIMM No. 175 (Angle)
„ 72 Pin ZIP No. 176
„ 72 Pin SIMM, No. 354 (Straight)
„ Single +5V (±10%) Supply Operation
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.
FIG. 1 PIN CONFIGURATIONS AND BLOCK DIAGRAM
NC 1
NC 2
PD3 3
PD4 4
VSS 5
PD1 6
PD2 7
DQ0 8
DQ8 9
DQ1 10
DQ9 11
DQ2 12
DQ10 13
DQ3 14
DQ11 15
VCC 16
A0 17
A7 18
A1 19
A8 20
A2 21
A9 22
DQ12 23
DQ4 24
DQ13 25
DQ5 26
DQ14 27
DQ6 28
DQ15 29
DQ7 30
VSS 31
W# 32
A15 33
A14 34
E2# 35
E1# 36
E4# 37
E3# 38
A17 39
A16 40
G# 41
VSS 42
DQ24 43
DQ16 44
DQ25 45
DQ17 46
DQ26 47
DQ18 48
DQ27 49
DQ19 50
A3 51
A10 52
A4 53
A11 54
A5 55
A12 56
VCC 57
A13 58
A6 59
DQ20 60
DQ28 61
DQ21 62
DQ29 63
DQ22 64
DQ30 65
DQ23 66
DQ31 67
VSS 68
NC 69
NC 70
NC 71
NC 72
PD 1,2 = VSS
PD 3,4 = Open
PIN NAMES
AØ-A17
EØ#-E3#
W#
G#
DQØ-DQ31
VCC
VSS
Address Inputs
Chip Enables
Write Enables
Output Enable
Common Data Input/Output
Power (+5V±10%)
Ground
A0 - A17
W#
G#
E0#
E1#
E2#
E3#
256K
X4
DQ0 - DQ3
256K
X4
DQ8 - DQ11
256K
X4
DQ16 - DQ19
256K
X4
DQ24 - DQ27
256K
X4
DQ4 - DQ7
256K
X4
DQ12 - DQ15
256K
X4
DQ20 - DQ23
256K
X4
DQ28 - DQ31
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
August 2006
Rev. 3
1
White Electronic Designs Corporation • [phone] • www.wedc.com