cym1821 Cypress Semiconductor Corporation., cym1821 Datasheet

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cym1821

Manufacturer Part Number
cym1821
Description
16k X 32 Static Ram Module
Manufacturer
Cypress Semiconductor Corporation.
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
cym1821PM-12C
Manufacturer:
CYPRESS/赛普拉斯
Quantity:
20 000
Features
Functional Description
The CYM1821 is a high-performance 512-Kbit static RAM
module organized as 16K words by 32 bits. This module is
Cypress Semiconductor Corporation
• High-density 512-Kbit SRAM module
• 32-bit standard footprint supports densities from 16K
• High-speed CMOS SRAMs
• Low active power
• SMD technology
• TTL-compatible inputs and outputs
• Low profile
• Small PCB footprint
• JEDEC-compatible pinout
Logic Block Diagram
A
x 32 through 1M x 32
— Access time of 12 ns
— 4W (max.)
— Max. height of .50 in.
— 1.0 sq. in.
0
- A
CS
CS
CS
CS
WE
OE
13
1
2
3
4
14
16K x 4
16K x 4
16K x 4
16K 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
16K x 4
16K x 4
16K x 4
16K x 4
PD
PD
SRAM
SRAM
SRAM
SRAM
0
1
- GND
- OPEN
constructed from eight 16K x 4 SRAM SOJ packages mount-
ed on an epoxy laminate board with pins. Four chip selects
(CS
the four bytes. Reading or writing can be executed on individ-
ual bytes or any combination of multiple bytes through proper
use of selects.
Writing to each byte is accomplished when the appropriate
chip selects (CS
LOW. Data on the input/output pins (I/O
memory location specified on the address pins (A
A
Reading the device is accomplished by taking the chip selects
(CS
these conditions the contents of the memory location specified
on the address pins will appear on the data input/output pins
(I/O
state when write enable (WE) is LOW, or the appropriate chip
selects are HIGH.
Two pins (PD
density in applications where alternate versions of the JEDEC
standard modules can be interchanged.
13
1821–1
).
16K x 32 Static RAM Module
X
1
N
, CS
).The data input/output pins stay in the high-impedance
) LOW, while write enable (WE) remains HIGH. Under
4
4
4
4
2
I/O
I/O
I/O
I/O
, CS
San Jose
4
12
20
28
0
– I/O
– I/O
– I/O
– I/O
3
and PD
Pin Configuration
, and CS
N
7
) and write enable (WE) inputs are both
15
23
31
November 1988 – Revised January 1995
1
) are used to identify module memory
4
) are used to independently enable
CA 95134
GND
GND
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
CS
CS
PD
I/O
I/O
I/O
I/O
V
I/O
I/O
I/O
I/O
NC
WE
A
A
A
A
NC
CC
A
A
A
16
17
18
19
10
11
12
13
20
21
22
23
0
0
1
2
3
7
8
9
4
5
6
7
1
3
Top View
X
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
) is written into the
ZIP
CYM1821
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
fax id: 2010
1
3
5
7
9
408-943-2600
1821–2
GND
PD
I/O
I/O
I/O
I/O
A
A
A
I/O
I/O
I/O
I/O
GND
NC
CS
CS
NC
OE
I/O
I/O
I/O
I/O
A
A
A
V
A
I/O
I/O
I/O
I/O
0
0
1
2
3
4
5
CC
6
through
8
9
10
11
12
13
14
15
24
25
26
27
28
29
30
31
1
2
4

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cym1821 Summary of contents

Page 1

... TTL-compatible inputs and outputs • Low profile — Max. height of .50 in. • Small PCB footprint — 1.0 sq. in. • JEDEC-compatible pinout Functional Description The CYM1821 is a high-performance 512-Kbit static RAM module organized as 16K words by 32 bits. This module is Logic Block Diagram ...

Page 2

... Max > V – 0.3V > V – 0. < 0. Test Conditions MHz 5.0V CC power-up, otherwise CYM1821 1821-25 1821-35 1821- 720 720 720 160 160 160 Ambient Temperature + 10% 1821-20 1821-25 1821-12 1821-35 ...

Page 3

... These parameters are guaranteed by design and not 100% tested. HZCS LZCS 3 CYM1821 ALL INPUT PULSES 90% 10% < 1821-15 1821-20 Min. Max. Min. Max ...

Page 4

... CYM1821 1821-45 Min. Max. Unit ...

Page 5

... OHA DOE t LZOE DATA VALID 50% [ SCS PWE t SD DATA VALID t HZWE and OE CYM1821 DATA VALID 1821–5 t HZOE t HZCS HIGH IMPEDANCE t PD 50% 1821– LZWE HIGH IMPEDANCE 1821–7 ICC ISB ...

Page 6

... L X Data In Write High Z Deselect Ordering Information Speed Ordering Code 12 CYM1821PM-12C CYM1821PZ-12C 15 CYM1821PM-15C CYM1821PZ-15C 20 CYM1821PM-20C CYM1821PZ-20C 25 CYM1821PM-25C CYM1821PZ-25C 35 CYM1821PM-35C CYM1821PZ-35C 45 CYM1821PM-45C CYM1821PZ-45C Document #: 38-M-00015 SCS PWE t SD DATA VALID t HZWE Mode Package Package Name Type PM01 64-Pin Plastic SIMM Module ...

Page 7

... Plastic SIMM Module PM01 3.845 3.855 3.580 3.588 0. .001 0.250 3.35 (64 PINS) 64-Pin Plastic ZIP Module PZ01 Bottom View 3.640 3.660 0.250 0.100 TYP TYP CYM1821 0.330 MAX 0.525 MAX 0.145 REF PIN 64 0.330 MAX 0.500 MAX 0.008 0.014 0.050 TYP 0.100 TYP DIMENSIONS IN INCHES MIN ...

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