Cypress Semiconductor CY7C1399B Specification Sheet

Features
• Single 3.3V power supply
• Ideal for low-voltage cache memory applications
• High speed
— 10/12/15 ns
• Low active power
— 216 mW (max.)
• Low-power alpha immune 6T cell
• Plastic SOJ and TSOP packaging
Functional Description
The CY7C1399B is a high-performance 3.3V CMOS Static
RAM organized as 32,768 words by 8 bits. Easy memory ex-
pansion is provided by an active LOW Chip Enable (CE) and
Logic Block Diagram
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
CE
WE
OE
Selection Guide
Maximum Access Time (ns)
Maximum Operating Current (mA)
Maximum CMOS Standby Current ( A)
Cypress Semiconductor Corporation
Document #: 38-05071 Rev. *A
INPUT BUFFER
32K x 8
ARRAY
POWER
COLUMN
DOWN
DECODER
L
• 3901 North First Street
32K x 8 3.3V Static RAM
active LOW Output Enable (OE) and three-state drivers. The
device has an automatic power-down feature, reducing the
power consumption by more than 95% when deselected.
An active LOW Write Enable signal (WE) controls the writing/
reading operation of the memory. When CE and WE inputs are
both LOW, data on the eight data input/output pins (I/O
through I/O ) is written into the memory location addressed by
7
the address present on the address pins (A
Reading the device is accomplished by selecting the device
and enabling the outputs, CE and OE active LOW, while WE
remains inactive or HIGH. Under these conditions, the con-
tents of the location addressed by the information on address
pins is present on the eight data input/output pins.
The input/output pins remain in a high-impedance state unless
the chip is selected, outputs are enabled, and Write Enable
(WE) is HIGH. The CY7C1399B is available in 28-pin standard
300-mil-wide SOJ and TSOP Type I packages.
I/O
0
I/O
1
I/O
2
I/O
3
I/O
4
I/O
5
I/O
6
I/O
7
1399B-10 1399B-12
10 12
60 55
500 500
50 50
• San Jose
CY7C1399B
through A
0

Pin Configurations

SOJ
Top View
A V
28
1
5 CC
A
27 WE
2
6
A
26
3 A
7
4
A
4 25 A
8
3
24
A
5
A
9
2
A
23
6 A
10
1
A
22
11
7 OE
A
21
A
12 8
0
A
20
CE
13 9
A 19
10 I/O
14
7
I/O 18 I/O
11
0 6
17
I/O 12 I/O
1 5
13 16
I/O
I/O
2 4
15
I/O
GND 14
3
1399B-15 1399B-20
15
50
500
50
• CA 95134 • 408-943-2600
Revised June 19, 2001
0
).
14
20
45
500
50