Static RAM Specification Sheet

32K x 8 3.3V Static RAM
CY7C1399B
Cypress Semiconductor Corporation 3901 North First Street San Jose CA 95134 408-943-2600
Document #: 38-05071 Rev. *A Revised June 19, 2001
399B
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
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
0
through I/O
7
) is written into the memory location addressed by
the address present on the address pins (A
0
through A
14
).
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.
Logic Block Diagram
Pin Configurations
1
2
3
4
5
6
7
8
9
10
11
14
15
16
20
19
18
17
21
24
23
22
Top View
SOJ
12
13
25
28
27
26
GND
A
6
A
7
A
8
A
9
A
10
A
11
A
12
A
13
WE
V
CC
A
4
A
3
A
2
A
1
I/O
7
I/O
6
I/O
5
I/O
4
A
14
A
5
I/O
0
I/O
1
I/O
2
CE
OE
A
0
I/O
3
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
COLUMN
DECODER
ROW DECODER
SENSE AMPS
INPUT BUFFER
POWER
DOWN
WE
OE
I/O
0
CE
I/O
1
I/O
2
I/O
3
32K x 8
ARRAY
I/O
7
I/O
6
I/O
5
I/O
4
A
9
A
0
A
11
A
13
A
12
A
14
A
10
Selection Guide
1399B-10 1399B-12 1399B-15 1399B-20
Maximum Access Time (ns) 10 12 15 20
Maximum Operating Current (mA) 60 55 50 45
Maximum CMOS Standby Current (µA) 500 500 500 500
L50
50 50 50

Summary of content (10 pages)