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PDF EDI8F32259C Data sheet ( Hoja de datos )
| Número de pieza | EDI8F32259C | |
| Descripción | 256Kx32 STATIC RAM CMOS | |
| Fabricantes | White Electronic Designs Corporation | |
| Logotipo |  |
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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
www.DataSheet4U72.coPmin 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
NC
PD3
PD4
VSS
PD1
PD2
DQ0
DQ8
DQ1
DQ9
DQ2
DQ10
DQ3
DQ11
VCC
A0
A7
A1
A8
A2
A9
DQ12
DQ4
DQ13
DQ5
DQ14
DQ6
DQ15
DQ7
VSS
W#
A15
A14
E2#
E1#
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
E4#
E3#
A17
A16
G#
VSS
DQ24
DQ16
DQ25
DQ17
DQ26
DQ18
DQ27
DQ19
A3
A10
A4
A11
A5
A12
VCC
A13
A6
DQ20
DQ28
DQ21
DQ29
DQ22
DQ30
DQ23
DQ31
VSS
NC
NC
NC
NC
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
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 • (602) 437-1520 • www.wedc.com
1 page  
White Electronic Designs
EDI8F32259C
FIG. 4 WRITE CYCLE 1 - W# CONTROLLED
tAVAV
A
E#
W#
www.DataSheet4U.com
D
Q
tAVWL
tAVWH
tELWH
tWLWH
tWLQZ
tWHAX
tDVWH
tWHDX
DATA VALID
tWHQX
HIGH Z
FIG. 5 WRITE CYCLE 2 - E# CONTROLLED
tAVAV
A
E#
W#
tAVEL
tELEH
tAVEH
tWLEH
D
Q HIGH Z
tEHAX
tDVEH
tEHDX
DATA VALID
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
August 2006
Rev. 3
5 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet EDI8F32259C.PDF ] | |
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