CY7C187-15VCT Cypress Semiconductor Corporation., CY7C187-15VCT Datasheet

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CY7C187-15VCT

Manufacturer Part Number
CY7C187-15VCT
Description
64K x 1 Static RAM
Manufacturer
Cypress Semiconductor Corporation.
Datasheet
Features
Functional Description
The CY7C187 is a high-performance CMOS static RAM orga-
nized as 65,536 words x 1 bit. Easy memory expansion is pro-
Selection Guide
Cypress Semiconductor Corporation
Maximum Access Time (ns)
Maximum Operating Current (mA)
Maximum Standby Current (mA)
Note:
• High speed
• CMOS for optimum speed/power
• Low active power
• Low standby power
• TTL compatible inputs and outputs
• Automatic power-down when deselected
1.
A
A
A
A
— 15 ns
— 495 mW
— 220 mW
Logic Block Diagram
A
A
A
A
12
13
14
15
0
1
2
3
For military specifications, see the CY7C187A datasheet.
INPUT BUFFER
COLUMN DECODER
[1]
256 x 256
ARRAY
POWER
DOWN
3901 North First Street
7C187-15
40/20
15
90
C187–1
DI
DO
CE
WE
vided by an active LOW Chip Enable (CE) and three-state driv-
ers. The CY7C187 has an automatic power-down feature,
reducing the power consumption by 56% when deselected.
Writing to the device is accomplished when the Chip Enable
(CE) and Write Enable (WE) inputs are both LOW. Data on the
input pin (D
the address pins (A
Reading the device is accomplished by taking the Chip Enable
(CE) LOW, while Write Enable (WE) remains HIGH. Under
these conditions, the contents of the memory location speci-
fied on the address pin will appear on the data output (D
pin.
The output pin stays in high-impedance state when Chip En-
able (CE) is HIGH or Write Enable (WE) is LOW.
The CY7C187 utilizes a die coat to insure alpha immunity.
Pin Configurations
D
GND
OUT
WE
NC
A
A
A
A
A
A
A
A
0
1
2
3
4
5
6
7
7C187-20
IN
San Jose
Top View
10
11
12
) is written into the memory location specified on
1
2
3
4
5
6
7
8
9
40/20
20
80
SOJ
0
24
23
22
21
20
19
18
17
16
15
14
13
through A
C187–3
64K x 1 Static RAM
V
A
A
A
A
NC
A
A
A
A
D
CE
CC
15
14
13
12
11
10
9
8
IN
CA 95134
7C187-25
15
20/20
25
70
).
D
GND
WE
OUT
A
A
A
A
A
A
A
A
0
1
2
3
4
5
6
7
Top View
1
2
3
4
5
6
7
8
9
10
11
DIP
CY7C187
October 4, 1999
408-943-2600
7C187-35
22
21
20
19
18
17
16
15
14
13
12
C187–2
20/20
35
70
V
A
A
A
A
A
A
A
A
D
CE
CC
15
14
13
12
11
10
9
8
IN
OUT
)

Related parts for CY7C187-15VCT

CY7C187-15VCT Summary of contents

Page 1

... The output pin stays in high-impedance state when Chip En- able (CE) is HIGH or Write Enable (WE) is LOW. The CY7C187 utilizes a die coat to insure alpha immunity. Pin Configurations SOJ Top View DI ...

Page 2

... Max – 0.3V – 0. 0.3V IN Test Conditions T = 25° MHz 5.0V CC power-up, otherwise CY7C187 [2] .........................................–0.5V to +7.0V Ambient Temperature + 10% 7C187-20 7C187-25, 35 Min. Max. Min. Max. Unit 2.4 2.4 0.4 0.4 2 –0.5 0.8 –0.5 0.8 –5 +5 – ...

Page 3

... JIG AND SCOPE C187–4 (b) 1.73V OUTPUT [6] Description Min. 15 [7] [ [8] is less than t for any given device. HZCE LZCE 3 CY7C187 ALL INPUT PULSES 90% 90% 10% 10 125 1.90V Commercial 7C187-15 7C187-20 Max. Min. Max ...

Page 4

... Read Cycle No. 1 ADDRESS DATA OUT PREVIOUS DATA VALID Notes: 10 HIGH for read cycle. 11. Device is continuously selected [6] (continued) Description Min. [7] [ OHA 4 CY7C187 7C187-25 7C187-35 Max. Min. Max ...

Page 5

... RC DATA VALID 50 SCE PWE t SD DATA VALID t HZWE SCE PWE t SD DATA VALID 5 CY7C187 t HZCE HIGH IMPEDANCE t PD ICC 50% ISB C187– LZWE HIGH IMPEDANCE C187– HIGH IMPEDANCE C187–9 ...

Page 6

... AMBIENT TEMPERATURE ( C) TYPICAL ACCESS TIME CHANGE vs. OUTPUT LOADING 30.0 25.0 20.0 15.0 10.0 V =4. = 5.0 0.0 0 200 400 600 800 1000 CAPACITANCE (pF) 6 CY7C187 OUTPUT SOURCE CURRENT vs. OUTPUT VOLTAGE 120 100 80 V =5. = 0.0 1.0 2.0 3.0 4.0 OUTPUT VOLTAGE (V) OUTPUT SINK CURRENT vs. OUTPUT VOLTAGE 140 120 ...

Page 7

... A15 X2 [14] Ordering Information Speed (ns) Ordering Code 15 CY7C187-15PC CY7C187-15VC 20 CY7C187-20PC CY7C187-20VC 25 CY7C187-25PC CY7C187-25VC 35 CY7C187-35PC CY7C187-35VC Note: 14. For military variations, see the CY7C187A datasheet. Document #: 38–00038–K Truth Table Pin CE WE Input/Output Number H X High Data Out Data ...

Page 8

... The inclusion of Cypress 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. 22-Lead (300-Mil) Molded DIP P9 24-Lead (300-Mil) Molded SOJ V13 CY7C187 51-85012-A 51-85030-A ...

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