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PDF 8F32256C Data sheet ( Hoja de datos )
| Número de pieza | 8F32256C | |
| Descripción | EDI8F32256C | |
| Fabricantes | White Electronic Designs Corporation | |
| Logotipo |  |
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EDI8F32256C
256Kx32 SRAM Module
Features
www.DataSheet4U.com
256Kx32 bit CMOS Static
Random Access Memory
• Access Times
BiCMOS: 10 and 12ns
CMOS: 15, 20, 25, and 35ns
• Individual Byte Selects
• Fully Static, No Clocks
• TTL Compatible I/O
High Density Package with JEDEC Standard Pinouts
• 64 Pin ZIP, No. 85
• 64 Lead Angled SIMM, No. 32
• 64 Lead SIMM, No. 333
• 64 ZIP Low Profile, No. 188
• Common Data Inputs and Outputs
Single +5V (±10%) Supply Operation
Pin Configurations and Block Diagram
PD1 2
DQØ 4
DQ1 6
DQ2 8
DQ3 10
VCC 12
A7 14
A8 16
A9 18
DQ4 20
DQ5 22
DQ6 24
DQ7 26
W 28
A14 30
EØ 32
E2
A16
VSS
DQ16
DQ17
DQ18
DQ19
A10
A11
A12
A13
DQ20
DQ21
DQ22
DQ23
VSS
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
1 VSS
3 PD2
5 DQ8
7 DQ9
9 DQ10
11 DQ11
13 AØ
15 A1
17 A2
19 DQ12
21 DQ13
23 DQ14
25 DQ15
27 VSS
29 A15
31 E1
33 E3
35 A17
37 G
39 DQ24
41 DQ25
43 DQ26
45 DQ27
47 A3
49 A4
51 A5
53 VCC
55 A6
57 DQ28
59 DQ29
61 DQ30
63 DQ31
64 Pin
PD1 - VSS
PD2 - VSS
256Kx32 Static RAM
CMOS, High Speed Module
The EDI8F32256C is a high speed 8 megabit 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 EDI8F32256C 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.
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 two pins, PD1 and PD2,
which are used to identify module memory density in applica-
tions where alternate modules can be interchanged.
Pin Names
AØ-A17
EØ-E3
W,
G
DQØ-DQ31
VCC
VSS
W
G
EØ
E1
E2
E3
Address Inputs
Chip Enables
Write Enables
Output Enable
Common Data Input/Output
Power (+5V±10%)
Ground
DQØ-DQ3
4
4 DQ8-DQ11
4 DQ16-DQ19
DQ24-DQ27
4
4 DQ4-DQ7
4 DQ12-DQ15
4 DQ20-DQ23
4 DQ28-DQ31
Electronic Designs, Inc.
• One Research Drive • Westborough, MA 01581USA • 508-366-5151 • FAX 508-836-4850 •
http://www.electronic-designs.com
1
EDI8F32256C Rev. 12 9/98 ECO #10816
1 page  
EDI8F32256C
256Kx32 SRAM Module
AC Characteristics Write Cycle
www.DataSheet4U.com
Parameter
Write Cycle Time
Chip Enable to End of Write
Address Setup Time
Address Valid to End of Write
Write Pulse Width
Write Recovery Time
Data Hold Time
Write to Output in High Z (1)
Data to Write Time
Output Active from End of Write (1)
Symbol
JEDEC Alt.
TAVAV TWC
TELWH TCW
TWLEH TCW
TAVWL TAS
TAVEL TAS
TAVWH TAW
TAVEH TAW
TWLWH TWP
TELEH TWP
TWHAX TWR
TEHAX TWR
TWHDX TDH
TEHDX TDH
TWLQZ TWHZ
TDVWH TDW
TDVEH TDW
TWHQX TWLZ
Note 1: Parameter guaranteed, but not tested.
*BICMOS
10ns*
Min Max
10
7
7
0
0
7
7
7
7
0
0
3
3
05
5
5
3
12ns*
Min Max
12
8
8
0
0
8
8
8
8
0
0
3
3
06
6
6
3
15ns
Min Max
15
12
10
0
0
10
10
10
10
0
0
3
3
09
7
7
3
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
AC Characteristics Write Cycle
Parameter
Write Cycle Time
Chip Enable to End of Write
Address Setup Time
Address Valid to End of Write
Write Pulse Width
Write Recovery Time
Data Hold Time
Write to Output in High Z (1)
Data to Write Time
Output Active from End of Write (1)
Note 1: Parameter guaranteed, but not tested.
Symbol
JEDEC Alt.
TAVAV TWC
TELWH TCW
TWLEH TCW
TAVWL TAS
TAVEL TAS
TAVWH TAW
TAVEH TAW
TWLWH TWP
TELEH TWP
TWHAX TWR
TEHAX TWR
TWHDX TDH
TEHDX TDH
TWLQZ TWHZ
TDVWH TDW
TDVEH TDW
TWHQX TWLZ
20ns
Min Max
20
15
15
0
0
15
15
15
15
0
0
3
3
0 10
12
12
3
25ns
Min Max
25
20
20
0
0
20
20
20
20
0
0
3
3
0 12
15
15
3
35ns
Min Max
35
30
30
0
0
30
30
30
30
0
0
3
3
0 15
20
20
3
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
5
EDI8F32256C Rev. 12 9/98 ECO #10816
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet 8F32256C.PDF ] | |
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