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EDI8F32259C-MM PDF预览

EDI8F32259C-MM

更新时间: 2024-01-15 06:23:03
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其他 - ETC 静态存储器
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描述
SRAM Modules

EDI8F32259C-MM 数据手册

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EDI8F32259C  
256Kx32 SRAM Module  
256Kx32 Static RAM  
CMOS, High Speed Module  
Features  
256Kx32 bit CMOS Static  
Random Access Memory  
Access Times  
The EDI8F32259C 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.  
BiCMOS: 10 and 12ns  
CMOS: 15, 20, 25, and 35ns  
Individual Byte Selects  
• Fully Static, No Clocks  
TTL Compatible I/O  
Four chip enables (EØ-E3) are used to independently enable  
thefourbytes. Readingorwritingcanbeexecutedonindividual  
bytes or any combination of multiple bytes through proper use  
of selects.  
High Density Package with JEDEC  
Standard Pinouts  
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.  
• 72 Pin SIMM No. 175 (Angle)  
• 72 Pin ZIP No. 176  
• 72 Pin SIMM, No. 354 (Straight)  
Single +5V (±10%) Supply Operation  
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.  
Pin Configurations and Block Diagram  
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.  
1
3
5
7
9
NC  
NC  
PD4  
PD1  
DQØ  
DQ1 10  
DQ2 12  
DQ3 14  
VCC 16  
A7 18  
A8 20  
A9 22  
DQ4 24  
DQ5 26  
DQ6 28  
DQ7 30  
2
4
6
8
PD3  
VSS  
PD2  
DQ8  
11 DQ9  
13 DQ10  
15 DQ11  
17 AØ  
19 A1  
21 A2  
23 DQ12  
25 DQ13  
27 DQ14  
29 DQ15  
31 VSS  
33 A15  
35 E1  
Pin Names  
AØ-A17  
EØ-E3  
W,  
Address Inputs  
Chip Enables  
Write Enables  
G
Output Enable  
DQØ-DQ31  
VCC  
Common Data Input/Output  
Power(+5V±10%)  
W
32  
72 Pin  
A14 34  
EØ 36  
VSS  
Ground  
PD 1,2 - VSS  
PD 3,4 - Open  
W
G
37 E3  
39 A17  
E2 38  
A16 40  
41  
G
DQØ-DQ3  
DQ4-DQ7  
VSS 42  
DQ16 44  
DQ17 46  
DQ18 48  
DQ19 50  
A10 52  
A11 54  
A12 56  
A13 58  
DQ20 60  
DQ21 62  
DQ22 64  
DQ23 66  
VSS 68  
NC 70  
4
4
4
4
43 DQ24  
45 DQ25  
47 DQ26  
49 DQ27  
51 A3  
53 A4  
55 A5  
57 VCC  
59 A6  
61 DQ28  
63 DQ29  
65 DQ30  
67 DQ31  
69 NC  
EØ  
E1  
E2  
E3  
DQ8-DQ11  
DQ16-DQ19  
DQ24-DQ27  
DQ12-DQ15  
DQ20-DQ23  
DQ28-DQ31  
4
4
71 NC  
4
4
NC 72  
Electronic Designs Incorporated  
• One Research Drive • Westborough, MA 01581USA • 508-366-5151 • FAX 508-836-4850 •  
Electronic Designs Europe Ltd. • Shelley House, The Avenue • Lightwater, Surrey GU18 5RF  
United Kingdom • 01276 472637 • FAX: 01276 473748  
1
EDI8F32259CRev. 1 12/97ECO#9619  

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