Cypress Semiconductor CY7C1007B Scheda tecnica

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07B
Features
• High speed
— t
= 12 ns
AA
• CMOS for optimum speed/power
• Automatic power-down when deselected
• TTL-compatible inputs and outputs
Functional Description
The CY7C107B and CY7C1007B are high-performance
CMOS static RAMs organized as 1,048,576 words by 1 bit.
Easy memory expansion is provided by an active LOW Chip
Enable (CE) and three-state drivers. These devices have an
automatic power-down feature that reduces power consump-
tion by more than 65% when deselected.
Logic Block Diagram
INPUT BUFFER
A
0
A
1
A
2
A
3
A
512x2048
4
A
5
A
6
A
7
A
8
COLUMN
DECODER
Selection Guide
Maximum Access Time (ns)
Maximum Operating
Current (mA)
Maximum CMOS Standby
Current SB2 (mA)
Cypress Semiconductor Corporation
Document #: 38-05030 Rev. **
ARRA Y
POWER
DOWN
7C107B-12
7C1007B-12
12
90
2
•
3901 North First Street
Writing to the devices is accomplished by taking Chip Enable
(CE) and Write Enable (WE) inputs LOW. Data on the input pin
(D
) is written into the memory location specified on the ad-
IN
dress pins (A
through A
0
Reading from the devices is accomplished by taking Chip En-
able (CE) LOW while Write Enable (WE) remains HIGH. Under
these conditions, the contents of the memory location speci-
fied by the address pins will appear on the data output (D
pin.
The output pin (D
when the device is deselected (CE HIGH) or during a write
operation (CE and WE LOW).
The CY7C107B is available in a standard 400-mil-wide SOJ;
the CY7C1007B is available in a standard 300-mil-wide SOJ.
D
IN
D
OUT
CE
WE
107B-1
7C107B-15
7C107B-20
7C1007B-15
7C1007B-20
15
20
80
75
2
2
•
San Jose
CY7C107B
CY7C1007B
1M x 1 Static RAM
).
19
) is placed in a high-impedance state
OUT
Pin Configuration
SOJ
Top View
A
28
V
1
10
CC
A
27
2
A
11
9
A
3
26
A
12
8
A
4
25
A
13
7
24
A
A
5
14
6
23
A
A
6
15
5
22
NC
7
A
4
21
A
8
NC
16
A
20
9
A
17
3
A
19
10
A
18
2
A
18
A
11
19
1
A
D
17
12
OUT
0
13
16
D
WE
IN
15
GND
14
CE
107B-2
7C107B-25
7C107B-35
7C1007B-25
7C1007B-35
25
70
2
•
CA 95134
•
408-943-2600
Revised September 7, 2001
)
OUT
35
60
2
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