92
CY7C192
64K x 4 Static RAM
with Separate I/O
pansion is provided by active LOW Chip Enable (CE) and
three-state drivers. It has an automatic power-down feature,
reducing the power consumption by 75% when deselected.
Features
• High speed
— 12 ns
Writing to the device is accomplished when the Chip Enable
(CE) and write enable (WE) inputs are both LOW.
• CMOS for optimum speed/power
• Low active power
Data on the four input pins (I0 through I3) is written into the
memory location specified on the address pins (A0 through
A15).
— 880 mW
• Low standby power
— 220 mW
Reading the device is accomplished by taking the Chip Enable
(CE) LOW while the Write Enable (WE) remains HIGH. Under
these conditions the contents of the memory location specified
on the address pins will appear on the four data output pins.
• TTL-compatible inputs and outputs
• Automatic power-down when deselected
The output pins stay in high-impedance state when Write En-
able (WE) is LOW, or Chip Enable (CE) is HIGH.
Functional Description
The CY7C192 is a high-performance CMOS static RAM orga-
nized as 65,536 x 4 bits with separate I/O. Easy memory ex-
A die coat is used to insure alpha immunity.
Logic Block Diagram
Pin Configurations
I
0
I
1
LCC
Top View
DIP/SOJ
Top View
I
2
1
A
V
6
CC
28
I
3
2
3
4
A
A
5
7
27
26
25
3
2 1 2827
26
A
8
A
4
4
A
A
A
A
A
A
I
9
4
3
2
1
0
A
9
A
3
5
6
7
8
25
24
23
22
21
20
19
18
A
INPUT BUFFER
10
A
10
A
11
5
6
A
12
24
A
2
11
A
23
A
A
1
0
A
A
A
13
14
15
A
A
7
8
9
10
12
13
22
A
A
1
0
9
O
O
0
3
A
21
20
19
18
17
16
I
3
2
10
11
12
I
2
A
A
A
I
2
14
3
I
0
O
O
3
2
A
O
O
4
15
1
1024 x 64 x 4
ARRAY
I
1
3
A
1314151617
I
0
5
A
11
12
13
14
2
6
A
I
O
O
WE
1
1
O
O
C191–3
2
7
A
CE
0
8
A
GND
15
3
9
C191–2
POWER
DOWN
COLUMN
DECODER
CE
7C192 ONLY
WE
C191–1
Selection Guide
7C192-12
7C192-15
7C192-20
7C192-25
Maximum Access Time (ns)
12
155
30
15
145
30
20
135
30
25
115
30
Maximum Operating Current (mA)
Maximum Standby Current (mA)
Cypress Semiconductor Corporation
•
3901 North First Street
•
San Jose
•
CA 95134
•
408-943-2600
Document #: 38-05047 Rev. **
Revised August 24, 2001