cym1464 Cypress Semiconductor Corporation., cym1464 Datasheet

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cym1464

Manufacturer Part Number
cym1464
Description
512kx8 Static Ram Module Semiconductor
Manufacturer
Cypress Semiconductor Corporation.
Datasheet

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64
Features
Functional Description
The CYM1464 is a high-performance 4-megabit static RAM
module organized as 512K words by 8 bits. This module is
Selection Guide
Cypress Semiconductor Corporation
Document #: 38-05272 Rev. **
Maximum Access Time (ns)
Maximum Operating Current (mA)
Maximum Standby Current (mA)
• High-density 4-megabit SRAM module
• High-speed CMOS SRAMs
• Low active power
• JEDEC-compatible pinout
• 32-pin, 0.6-inch-wide DIP package
• TTL-compatible inputs and outputs
• Low profile
— Access time of 20 ns
— 1.93W (max.)
— Max. height of 0.34 inches
Logic Block Diagram
A
0
A
WE
A
OE
CS
17
18
DECODER
1 OF 2
1464-20
350
240
20
3901 North First Street
256K x 4
256K x 4
SRAM
SRAM
1464-22
350
240
22
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
ten into the memory location specified on the address pins (A
through A
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
put/output pins (I/O
The input/output pins remain in a high-impedance state unless
the module is selected, outputs are enabled, and write enable
(WE) is HIGH.
1464-25
256K x 4
256K x 4
SRAM
SRAM
0
25
through A
512Kx8 Static RAM Module
18
San Jose
). Reading the device is accomplished by taking
1464-30
18
300
240
) will appear on the eight appropriate data in-
30
I/O
0
0
through I/O
I/O
Pin Configuration
1464-35
0
7
GND
I/O
I/O
I/O
through I/O
A
A
A
A
35
A
A
A
A
A
A
A
A
CA 95134
18
16
14
12
7
6
5
4
3
2
1
0
0
1
2
7
).
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
S
Revised March 15, 2002
1464-45
Top View
7
) of the device is writ-
300
240
DIP
45
CYM1464
408-943-2600
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
1464-55
55
V
A
A
WE
A
A
A
A
OE
A
CS
I/O
I/O
I/O
I/O
I/O
CC
15
17
13
8
9
11
10
7
6
5
4
3
0

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cym1464 Summary of contents

Page 1

... 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 Logic Block Diagram ...

Page 2

... C to +70 C 1464-20, 22, 25 1464-30, 35, 45, 55 Min. Max. Min. Max. 2.4 2.4 0.4 0.4 2.2 V +0.3 2 0.5 0.8 0.5 0.8 10 +10 10 +10 10 +10 10 +10 350 300 240 240 60 Max ALL INPUT PULSES 3.0V 90% 10% < CYM1464 10% Unit Unit pF pF 90% 10% < Page ...

Page 3

... Min. Max [ CYM1464 1464-25 1464-30 Max. Min. Max. Min. Max ...

Page 4

... AA t OHA ACS t DOE t LZOE 50% . [3] 1464-45 1464-55 Min. Max. Min. Max DATA VALID t HZOE t HZCS IMPEDANCE DATA VALID t PD 50% CYM1464 Unit HIGH ICC ISB Page ...

Page 5

... If CS goes HIGH simultaneously with WE HIGH, the output remains in a high-impedance state. Document #: 38-05272 Rev SCS PWE DATA VALID t HZWE PWE DATA VALID t HZWE LZWE HIGH IMPEDANCE t SCS HIGH IMPEDANCE CYM1464 Page ...

Page 6

... Ordering Information Speed (ns) Ordering Code 20 CYM1464PD 20C 22 CYM1464PD 22C 25 CYM1464PD 25C 30 CYM1464PD 30C 35 CYM1464PD 35C 45 CYM1464PD 45C 55 CYM1464PD 55C Document #: 38-05272 Rev. ** Mode Deselect/Power-Down Read Word Write Word Deselect Package Type Package Type PD02 32-Pin DIP Module PD02 32-Pin DIP Module ...

Page 7

... Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges. 32-Pin DIP Module PD02 1.590 1.610 0.590 0.610 0.315 0.335 0.125 0.175 0.050 TYP CYM1464 0.600 0.620 0.007 0.013 DIMENSIONSININCHES MIN. MAX. Page ...

Page 8

... Document Title: CYM1464 512K x 8 Static RAM Module Document Number: 38-05272 Issue REV. ECN NO. Date ** 114173 3/19/02 Document #: 38-05272 Rev. ** Orig. of Change DSG Change from Spec number: 38-M-00030 to 38-05272 CYM1464 Description of Change Page ...

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