006
CY7C106
CY7C1006
256K x 4 Static RAM
an active LOW output enable (OE), and three-state drivers.
These devices have an automatic power-down feature that re-
duces power consumption by more than 65% when the devic-
es are deselected.
Features
• High speed
— tAA = 12 ns
• CMOS for optimum speed/power
• Low active power
Writing to the devices is accomplished by taking chip enable
(CE) and write enable (WE) inputs LOW. Data on the four I/O
pins (I/O0 through I/O3) is then written into the location speci-
fied on the address pins (A0 through A17).
— 910 mW
• Low standby power
— 275 mW
Reading from the devices is accomplished by taking chip en-
able (CE) and output enable (OE) LOW while forcing write en-
able (WE) HIGH. Under these conditions, the contents of the
memory location specified by the address pins will appear on
the four I/O pins.
• 2.0V data retention (optional)
— 100 µW
• Automatic power-down when deselected
• TTL-compatible inputs and outputs
The four input/output pins (I/O0 through I/O3) are placed in a
high-impedance state when the devices are deselected (CE
HIGH), the outputs are disabled (OE HIGH), or during a write
operation (CE and WE LOW).
Functional Description
The CY7C106 and CY7C1006 are high-performance CMOS
static RAMs organized as 262,144 words by 4 bits. Easy mem-
ory expansion is provided by an active LOW chip enable (CE),
The CY7C106 is available in a standard 400-mil-wide SOJ; the
CY7C1006 is available in a standard 300-mil-wide SOJ.
Logic Block Diagram
Pin Configuration
SOJ
Top View
28
27
26
1
2
3
4
5
6
A
V
CC
0
A
A
17
A
16
A
15
1
A
2
3
A
25
24
A
A
14
A
13
A
12
4
23
22
A
5
A
7
8
9
10
11
12
13
6
A
21
20
19
18
17
A
7
11
INPUTBUFFER
A
NC
I/O
8
A
9
3
2
1
A
1
A
10
I/O
I/O
I/O
A
A
3
I/O
I/O
I/O
I/O
CE
OE
GND
2
3
2
1
0
16
15
0
14
WE
A
4
A
5
512 x 512 x 4
ARRAY
C106–2
A
6
A
7
A
8
A
9
POWER
DOWN
COLUMN
DECODER
CE
WE
OE
C106–1
Selection Guide
7C106-12
7C1006-12
7C106-15
7C1006-15
7C106-20
7C1006-20
7C106-25
7C1006-25
7C106-35
35
Maximum Access Time (ns)
12
15
20
25
Maximum Operating
Current (mA)
165
155
145
130
125
Maximum Standby
Current (mA)
50
30
30
30
25
Cypress Semiconductor Corporation
•
3901 North First Street
•
San Jose
•
CA 95134
•
408-943-2600
Document #: 38-05033 Rev. **
Revised July 9, 1998