CY7C109D
CY7C1009D
1-Mbit (128 K × 8) Static RAM
1-Mbit (128
K × 8) Static RAM
(OE), and tri-state drivers.The eight input and output pins (I/O0
through I/O7) are placed in a high-impedance state when:
Features
■ Pin- and function-compatible with CY7C109B/CY7C1009B
■ Deselected (CE1 HIGH or CE2 LOW),
■ Outputs are disabled (OE HIGH),
■ High speed
❐ tAA = 10 ns
■ When the write operation is active (CE1 LOW, CE2 HIGH, and
WE LOW)
■ Low active power
❐ ICC = 80 mA at 10 ns
Write to the device by taking Chip Enable One (CE1) and Write
Enable (WE) inputs LOW and Chip Enable Two (CE2) input
HIGH. Data on the eight I/O pins (I/O0 through I/O7) is then
written into the location specified on the address pins (A0 through
■ Low CMOS standby power
❐ ISB2 = 3 mA
■ 2.0 V Data Retention
■ Automatic power-down when deselected
■ TTL-compatible inputs and outputs
■ Easy memory expansion with CE1, CE2 and OE options
A16).
Read from the device by taking Chip Enable One (CE1) and
Output Enable (OE) LOW while forcing Write Enable (WE) and
Chip Enable Two (CE2) HIGH. Under these conditions, the
contents of the memory location specified by the address pins
appears on the I/O pins.
■ CY7C109D available in Pb-free 32-pin 400-Mil wide Molded
SOJ and 32-pin TSOP I packages. CY7C1009D available in
Pb-free 32-pin 300-Mil wide Molded SOJ package
The CY7C109D/CY7C1009D device is suitable for interfacing
with processors that have TTL I/P levels. It is not suitable for
processors that require CMOS I/P levels. Please see Electrical
Characteristics on page 4 for more details and suggested
alternatives.
Functional Description
[1]
The CY7C109D/CY7C1009D
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 (CE1), an
active HIGH Chip Enable (CE2), an active LOW Output Enable
For a complete list of related documentation, click here.
Logic Block Diagram
IO
0
INPUT BUFFER
IO
1
A
0
A
1
IO
2
A
2
128K x 8
ARRAY
A
A
A
A
A
A
IO
3
3
4
5
6
7
8
IO
4
IO
5
IO
6
IO
POWER
DOWN
7
CE
CE
COLUMN DECODER
1
2
WE
OE
Cypress Semiconductor Corporation
Document Number: 38-05468 Rev. *J
•
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Revised January 16, 2015