cym1481ps-85c Cypress Semiconductor Corporation., cym1481ps-85c Datasheet

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cym1481ps-85c

Manufacturer Part Number
cym1481ps-85c
Description
1024k Sram Module
Manufacturer
Cypress Semiconductor Corporation.
Datasheet
Features
Functional Description
The CYM1471 and CYM1481 are high-performance 8-mega-
bit and 16-megabit static RAM modules organized as 1024K
words (1471) or 2048K words (1481) by 8 bits. These modules
/
Cypress Semiconductor Corporation
• High-density 8-/16-megabit SRAM modules
• High-speed CMOS SRAMs
• Low active power
• Double-sided SMD technology
• TTL-compatible inputs and outputs
• Small footprint SIP
• 2V data retention (L version)
A
Logic Block Diagram
— Access time of 70 ns
— 605 mW (max.), 2M x 8
— PCB layout area of 0.72 sq. in.
A
17
0
–A
–A
WE
OE
MS
16
20
4
DECODER
DECODER
1 of 8
1 of 8
17
128K x 8
128K x 8
128K x 8
128K x 8
SRAM
SRAM
SRAM
SRAM
3901 North First Street
128K x 8
128K x 8
128K x 8
128K x 8
SRAM
SRAM
SRAM
SRAM
128K x 8
128K x 8
128K x 8
128K x 8
are constructed from eight (1471) or sixteen (1481) 128K x 8
SRAMs in plastic surface-mount packages on an epoxy lami-
nate board with pins. On-board decoding selects one of the
SRAMs from the high-order address lines, keeping the re-
maining devices in standby mode for minimum power con-
sumption.
An active LOW write enable signal (WE) controls the writ-
ing/reading operation of the memory. When MS and WE inputs
are both LOW, data on the eight data input/output pins is writ-
ten into the memory location specified on the address pins.
Reading the device is accomplished by selecting the device
and enabling the outputs MS and OE active LOW while WE
remains inactive or HIGH. Under these conditions, the content
of the location addressed by the information on the address
pins is present on the eight data input/output pins.
The input/output pins remain in a high-impedance state unless
the module is selected, outputs are enabled, and write enable
(WE) is HIGH.
SRAM
SRAM
SRAM
SRAM
1024K x 8 SRAM Module
2048K x 8 SRAM Module
San Jose
1471-1
128K x 8
128K x 8
128K x 8
128K x 8
SRAM
SRAM
SRAM
SRAM
October 1990 – Revised January 2, 1997
8
A
MS (1471)
Pin Configuration
CYM1471
20
I/O
CA 95134
(1481)
0
–I/O
7
GND
GND
V
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
V
A
WE
A
A
A
A
A
A
A
A
A
MS
OE
CC
CC
A
A
A
A
A
A
A
A
A
A
19
10
11
13
14
15
16
12
18
17
2
3
0
1
2
3
4
5
5
6
1
0
7
8
9
7
4
6
1471-2
CYM1471
CYM1481
fax id: 2006
408-943-2600
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
Top View
SIP

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cym1481ps-85c Summary of contents

Page 1

... Small footprint SIP — PCB layout area of 0.72 sq. in. • 2V data retention (L version) Functional Description The CYM1471 and CYM1481 are high-performance 8-mega- bit and 16-megabit static RAM modules organized as 1024K words (1471) or 2048K words (1481 bits. These modules Logic Block Diagram A – ...

Page 2

Selection Guide Maximum Access Time (ns) Maximum Operating Current (mA) Maximum Standby Current (mA) Maximum Ratings (Above which the useful life may be impaired.) Storage Temperature ................................. – +125 C Ambient Temperature with Power Applied................................................... 0 C ...

Page 3

AC Test Loads and Waveforms R1 2530 5V OUTPUT OUTPUT R2 100 pF 2830 INCLUDING JIG AND SCOPE (a) 1471-5 Equivalent to: THÉ VENIN EQUIVALENT 1340 2.64V OUTPUT Switching Characteristics Over the Operating Range Parameter Description READ CYCLE t ...

Page 4

Data Retention Characteristics Parameter Description Test Conditions Min. Max Min. Max Min Max Min Max Min Max Min Max Unit V V for Retention DR CC Data I Data Retention V = 3.0V, CCDR DR Current MS > V ...

Page 5

Switching Waveforms (continued) [8, 9] Read Cycle No AMS OE t LZOE HIGH IMPEDANCE DATA OUT t LZMS [5, 10] Write Cycle No. 1 ADDRESS DATA IN DATA I/O DATA UNDEFINED Notes: ...

Page 6

Switching Waveforms (continued) [5, 10, 11] Write Cycle No. 2 ADDRESS MS WE DATA IN DATA I/O DATA UNDEFINED Note: 11 goes HIGH simultaneously with WE HIGH, the output remains in a high-impedance state ...

Page 7

... Type 70 CYM1481PS-70C PS08 CYM1481LPS-70C 85 CYM1481PS–85C PS06 CYM1481LPS–85C 100 CYM1481PS–100C PS06 CYM1481LPS–100C 120 CYM1481PS–120C PS06 CYM1481LPS–120C Document #: 38–M–00041–C Mode Package Operating Type Range 36-Pin SIP Module Commercial 36-Pin SIP Module Commercial 36-Pin SIP Module ...

Page 8

... 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. 36-Pin SIP Module PS06 3.755 3.765 .020 TYP . .050 TYP . 3.500(36PINS) 36-Pin SIP Module PS08 3.755 3.765 .020 TYP . .050 TYP . 3.500(36PINS) CYM1471 CYM1481 ...

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