Cypress CY7C1019BN - Manual

128K x 8 Static RAM
CY7C1019BN
Cypress Semiconductor Corporation • 198 Champion Court • San Jose , CA 95134-1709 • 408-943-2600
Document #: 001-06425 Rev. ** Revised February 1, 2006
Features
• High speed
— t
AA
= 12, 15 ns
• CMOS for optimum speed/power
• Center power/ground pinout
• Automatic power-down when deselected
• Easy memory expansion with CE and OE options
• Functionally equivalent to CY7C1019
Functional Description
The CY7C1019BN is a high-performance CMOS static RAM
organized as 131,072 words by 8 bits. Easy memory
expansion is provided by an active LOW Chip Enable (CE), an
active LOW Output Enable (OE), and three-state drivers. This
device has an automatic power-down feature that significantly
reduces power consumption when deselected.
Writing to the device is accomplished by taking Chip Enable
(CE) and Write Enable (WE) inputs LOW. Data on the eight I/O
pins (I/O
0
through I/O
7
) is then written into the location
specified on the address pins (A
0
through A
16
).
Reading from the device is accomplished by taking Chip
Enable (CE) and Output Enable (OE) LOW while forcing Write
Enable (WE) HIGH. Under these conditions, the contents of
the memory location specified by the address pins will appear
on the I/O pins.
The eight input/output pins (I/O
0
through I/O
7
) are placed in a
high-impedance state when the device is deselected (CE
HIGH), the outputs are disabled (OE HIGH), or during a write
operation (CE LOW, and WE LOW).
The CY7C1019BN is available in standard 32-pin TSOP Type
II and 400-mil-wide SOJ packages.
14 15
Logic Block Diagram
Pin Configurations
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
COLUMN
DECODER
ROW DE
CODE
R
SE
N
SE A
M
PS
INPUT BUFFER
POWER
DOWN
WE
OE
I/O
0
I/O
1
I/O
2
I/O
3
512 x 256 x 8
ARRAY
I/O
7
I/O
6
I/O
5
I/O
4
A
0
A
11
A
13
A
12
A A
10
CE
A A
16 A
9
1
2
3
4
5
6
7
8
9
10
11
14 19
20
24
23
22
21
25
28
27
26
Top View
SOJ
12
13
29
32
31
30
16
15
17
18
A
7
A
1
A
2
A
3
CE
I/O
0
I/O
1
V
CC
A
13
A
16
A
15
OE
I/O
7
I/O
6
A
12
A
11
A
10
A
9
I/O
2
A
0
A
4
A
5
A
6
I/O
4
V
CC
I/O
5
A
8
I/O
3
WE
V
SS
A
14
V
SS
/ TSOPII
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