CYM1441PZ-20C CYPRESS [Cypress Semiconductor], CYM1441PZ-20C Datasheet

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CYM1441PZ-20C

Manufacturer Part Number
CYM1441PZ-20C
Description
256K x 8 Static RAM Module
Manufacturer
CYPRESS [Cypress Semiconductor]
Datasheet
Features
Cypress Semiconductor Corporation
Document #: 38-05271 Rev. **
• High-density 2-megabit SRAM module
• High-speed CMOS SRAMs
• Low active power
• SMD technology
• Separate data I/O
• 60-pin ZIP package
• TTL-compatible inputs and outputs
• Low profile
• Small PCB footprint
DI
DI
Logic Block Diagram
A
— Access time of 20 ns
— 5.3W (max.)
— Max. height of 0.5 in.
— 1.14 sq. in.
0
4
0
- A
- DI
- DI
CS
CS
WE
17
U
7
L
3
256K x 1
256K x 1
SRAM
SRAM
256K x 1
256K x 1
SRAM
SRAM
3901 North First Street
256K x 1
256K x 1
SRAM
SRAM
Functional Description
The CYM1441 is a very high performance 2-megabit static
RAM module organized as 256K words by 8 bits. The module
is constructed using eight 256K x 1 static RAMs in SOJ pack-
ages mounted onto an epoxy laminate substrate with pins. Two
chip selects (CS
the upper and lower 4 bits of the data word. Writing to the
memory module is accomplished when the chip select (CS)
and write enable (WE) inputs are both LOW. Data on the eight
input pins (DI
specified on the address pins (A
device is accomplished by taking chip select (CS) LOW while
write enable (WE) remains inactive or HIGH. Under these con-
ditions, the contents of the memory location specified on the
address pins will appear on the appropriate data output pins
(DO
impedance state unless the module is selected and write en-
able (WE) is HIGH.Two pins (PD
module memory density in applications where alternate ver-
sions of the JEDEC-standard modules can be interchanged.
0
256K x 8 Static RAM Module
through DO
256K x 1
256K x 1
SRAM
SRAM
San Jose
0
through DI
L
DO
DO
and CS
7
). The data output pins remain in a high-
4
0
- DO
- DO
Pin Configuration
7
U
(OPEN)PD
7
3
) is written into the memory location
) are used to independently enable
CA 95134
0
GND
GND
DO
DO
DO
DO
0
V
CS
V
and PD
WE
A
A
A
A
NC
DI
DI
NC
NC
DI
NC
DI
NC
NC
CC
CC
A
A
A
A
A
through A
10
12
14
16
0
0
1
2
3
0
0
2
4
6
1
9
L
2
3
Revised March 15, 2002
TopView
1
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
ZIP
) are used to identify
CYM1441
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
17
1
3
5
7
9
). Reading the
408-943-2600
GND
PD
NC
DI
DO
NC
A
A
A
A
DI
DO
V
A
NC
CS
NC
NC
DI
DO
GND
A
A
A
A
DI
DO
V
NC
NC
1
3
5
7
CC
8
11
13
15
17
CC
4
5
6
7
1
U
4
5
6
7
(GND)

Related parts for CYM1441PZ-20C

CYM1441PZ-20C Summary of contents

Page 1

... Static RAM Module Functional Description The CYM1441 is a very high performance 2-megabit static RAM module organized as 256K words by 8 bits. The module is constructed using eight 256K x 1 static RAMs in SOJ pack- ages mounted onto an epoxy laminate substrate with pins. Two chip selects (CS the upper and lower 4 bits of the data word ...

Page 2

Selection Guide Maximum Access Time (ns) Maximum Operating Current (mA) Maximum Standby Current (mA) Shaded area contains preliminary information. Maximum Ratings (Above which the useful life may be impaired.) Storage Temperature ................................. – +125 C Ambient Temperature with ...

Page 3

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 CS LOW to Low ...

Page 4

Switching Waveforms (continued) [6,8] Read Cycle No LZCS HIGH IMPEDANCE DATAOUT SUPPLY CURRENT Write Cycle No. 1 (WE Controlled) ADDRESS DATAIN DATAOUT DATA UNDEFINED Write Cycle No. 2 (CS ...

Page 5

... WE Input/Output H X High Z Deselect/Power-Down L H Data Out Read L L Data In Write Ordering Information Package Speed Ordering Code 20 CYM1441PZ-20C 25 CYM1441PZ-25C 35 CYM1441PZ-35C 45 CYM1441PZ-45C Shaded area contains preliminary information. Package Diagrams 0.050 0.050 0.120 0.150 0.135 0.015 0.165 0.025 Pin 1 Document #: 38-05271 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 ...

Page 6

... Document Title: CYM1441 256K x 8 Static RAM Module Document Number: 38-05271 Issue REV. ECN NO. Date ** 114172 3/19/02 Document #: 38-05271 Rev. ** Orig. of Change DSG Change from Spec number: 38-M-00020 to 38-05271 CYM1441 Description of Change Page ...

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