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參數資料
| 型號： | CYM1464 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | 512Kx8 Static RAM Module(521K x 8 靜態RAM模塊) |
| 中文描述： | 512Kx8靜態RAM模塊（521K × 8靜態內存模塊） |
| 文件頁數： | 1/7頁 |
| 文件大小： | 93K |
| 代理商： | CYM1464 |
512Kx8 Static RAM Module
CYM1464
Cypress Semiconductor Corporation
3901 North First Street
San Jose
CA 95134
408-943-2600
October 1989 – Revised February 1995
1CYM1464
Features
High-density 4-megabit SRAM module
High-speed CMOS SRAMs
—Access time of 20 ns
Low active power
—1.93W (max.)
JEDEC-compatible pinout
32-pin, 0.6-inch-wide DIP package
TTL-compatible inputs and outputs
Low profile
—Max. height of 0.34 inches
Functional Description
The CYM1464 is a high-performance 4-megabit static RAM
module organized as 512K words by 8 bits. This module is
constructed using four 256K x 4 static RAMs in SOJ packages
mounted on an epoxy laminate substrate with pins.
Writing to the module is accomplished when the chip select
(CS) and write enable (WE) inputs are both LOW. Data on the
eight input/output pins (I/O
0
through I/O
7
) of the device is writ-
ten into the memory location specified on the address pins (A
0
through A
18
). Reading the device is accomplished by taking
chip select and output enable (OE) LOW, while write enable
(WE) remains inactive or HIGH. Under these conditions, the
contents of the memory location specified on the address pins
(A
0
through A
18
) will appear on the eight appropriate data in-
put/output pins (I/O
0
through I/O
7
).
The input/output pins remain in a high-impedance state unless
the module is selected, outputs are enabled, and write enable
(WE) is HIGH.
Logic Block Diagram
Pin Configuration
1464–1
Top View
DIP
25
24
26
27
28
29
30
31
32
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
S
A
18
A
16
A
14
A
12
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
I/O
0
I/O
1
I/O
2
GND
V
CC
A
15
A
17
WE
A
13
A
8
A
9
A
11
OE
A
10
CS
I/O
7
I/O
6
I/O
5
I/O
4
I/O
3
1464–2
0
I/O
7
1 OF 2
DECODER
SRAM
256K x 4
SRAM
A
0
A
17
WE
OE
A
18
CS
I/O
256K x 4
SRAM
256K x 4
SRAM
256K x 4
Selection Guide
1464-20
20
350
240
1464-22
22
350
240
1464-25
25
1464-30
30
300
240
1464-35
35
1464-45
45
300
240
1464-55
55
Maximum Access Time (ns)
Maximum Operating Current (mA)
Maximum Standby Current (mA)
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| CYM1465A | 512K x 8 PDIP Static RAM |
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| CYM1465ALPD-85C | 512K x 8 PDIP Static RAM |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| CYM1464PD-20C | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:512Kx8 Static RAM Module |
| CYM1464PD-22C | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:512Kx8 Static RAM Module |
| CYM1464PD-25C | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:512Kx8 Static RAM Module |
| CYM1464PD-30C | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:512Kx8 Static RAM Module |
| CYM1464PD-35C | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:512Kx8 Static RAM Module |
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