cym1851pz-35c Cypress Semiconductor Corporation., cym1851pz-35c Datasheet

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cym1851pz-35c

Manufacturer Part Number
cym1851pz-35c
Description
1,024k X 32 Static Ram Module Semiconductor
Manufacturer
Cypress Semiconductor Corporation.
Datasheet
51
Features
Functional Description
The CYM1851 is a high-performance 32-megabit static RAM
module organized as 1,024K words by 32 bits. This module is
constructed from eight 1,024K x 4 SRAMs in SOJ packages
Cypress Semiconductor Corporation
Document #: 38-05274 Rev. **
• High-density 32-megabit SRAM module
• 32-bit Standard Footprint supports densities from 16K
• High-speed SRAMs
• Low active power
• 72 pins
• Available in ZIP, SIMM, or angled SIMM format
x 32 through 1M x 32
— Access time of 12 ns
— 8.36W (max.) at 12 ns
Logic Block Diagram
A
0
–A
CS
CS
CS
CS
WE
OE
19
1
2
3
4
20
1M x 4
1M x 4
1M x 4
1M x 4
SRAM
SRAM
SRAM
SRAM
4
4
4
4
I/O
I/O
I/O
I/O
0
8
16
24
– I/O
– I/O
– I/O
– I/O
3901 North First Street
3
11
19
27
PD
PD
PD
PD
1M x 4
1M x 4
1M x 4
1M x 4
SRAM
SRAM
SRAM
SRAM
1,024K x 32 Static RAM Module
0
1
2
3
mounted on an epoxy laminate substrate. Four chip selects are
used to independently enable the four bytes. Reading or writ-
ing can be executed on individual bytes or any combination of
multiple bytes through proper use of selects.
The CYM1851 is designed for use with standard 72-pin SIMM
sockets. The pinout is downward compatible with the 64-pin
JEDEC ZIP/SIMM module family (CYM1821, CYM1831,
CYM1836, and CYM1841). Thus, a single motherboard de-
sign can be used to accommodate memory depth ranging from
16K words (CYM1821) to 1,024K words (CYM1851). The
CYM1851 is offered in vertical and angled SIMM configura-
tions and both are available with either tin-lead or 10 mi-
cro-inches of gold flash on the edge contacts.
Presence detect pins (PD
memory density in applications where modules with alternate
word depths can be interchanged.
- GND
- OPEN
- GND
- OPEN
4
4
4
4
I/O
I/O
I/O
I/O
San Jose
4
12
20
28
– I/O
– I/O
– I/O
– I/O
Pin Configuration
7
15
23
31
0
–PD
CA 95134
GND
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
GND
3
PD
PD
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
CS
CS
V
WE
A
A
A
A
A
A
A
) are used to identify module
NC
NC
CC
A
A
A
14
16
16
17
18
19
10
11
12
13
20
21
22
23
19
3
0
0
1
2
3
7
8
9
4
5
6
7
1
3
Revised March 15, 2002
ZIP/SIMM
Top View
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
66
68
70
72
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
CYM1851
1
3
5
7
9
408-943-2600
NC
PD
GND
PD
I/O
I/O
I/O
I/O
A
A
A
I/O
I/O
I/O
I/O
GND
A
CS
CS
A
OE
I/O
I/O
I/O
I/O
A
A
A
V
A
I/O
I/O
I/O
I/O
A
NC
0
1
2
15
17
3
4
5
CC
6
18
2
1
8
9
10
11
12
13
14
15
24
25
26
27
28
29
30
31
2
4

Related parts for cym1851pz-35c

cym1851pz-35c Summary of contents

Page 1

... Available in ZIP, SIMM, or angled SIMM format Functional Description The CYM1851 is a high-performance 32-megabit static RAM module organized as 1,024K words by 32 bits. This module is constructed from eight 1,024K x 4 SRAMs in SOJ packages Logic Block Diagram A –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. For user guide- lines, not tested.) Storage Temperature ................................. – +125 C Ambient Temperature ...

Page 3

AC Test Loads and Waveforms R1 481 5V OUTPUT OUTPUT R2 255 30 pF INCLUDING JIG AND SCOPE (a) Equivalent to: THÉ VENIN EQUIVALENT 167 OUTPUT Switching Characteristics Over the Operating Range Parameter READ CYCLE t Read Cycle Time RC ...

Page 4

Switching Characteristics Over the Operating Range Parameter Description READ CYCLE t Read Cycle Time RC t Address to Data Valid AA t Data Hold from Address Change OHA t CS LOW to Data Valid ACS t OE LOW to Data ...

Page 5

Switching Waveforms (continued) [7,9] Read Cycle No HIGH IMPEDANCE DATA OUT t LZCS SUPPLY CURRENT Write Cycle No. 1 (WE Controlled) ADDRESS DATA IN DATA OUT DATA UNDEFINED Note: ...

Page 6

Switching Waveforms (continued) Write Cycle No. 2 (CS Controlled) ADDRESS CS WE DATA IN DATA OUT DATA UNDEFINED Note: 10 goes HIGH simultaneously with WE HIGH, the output remains in a high-impedance state. Truth Table ...

Page 7

... CYM1851PZ-20C 25 CYM1851PM-25C CYM1851P8-25C CYM1851PN-25C CYM1851P6-25C CYM1851PZ-25C 35 CYM1851PM-35C CYM1851P8-35C CYM1851PN-35C CYM1851P6-35C CYM1851PZ-35C Package Diagrams Document #: 38-05274 Rev. ** Type Package Type PM04 72-Pin Plastic SIMM Module PM04 72-Pin Plastic SIMM Module (gold contacts) PN04 72-Pin Plastic Angled SIMM Module PN04 72-Pin Plastic Angled SIMM Module (gold contacts) ...

Page 8

... Package Diagrams (continued) 72-Pin Plastic Angled SIMM Module PN04 Document #: 38-05274 Rev. ** © Cypress Semiconductor Corporation, 2002. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user ...

Page 9

... Document Title: CYM1851 1,024K x 32 Static RAM Module Document Number: 38-05274 Issue REV. ECN NO. Date ** 114175 3/19/02 Document #: 38-05274 Rev. ** Orig. of Change DSG Change from Spec number: 38-M-00052 to 38-05274 CYM1851 Description of Change Page ...

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