CY7C185
64-Kbit (8 K × 8) Static RAM
Features
Functional Description
The CY7C185[1] is a high-performance CMOS static RAM
organized as 8192 words by 8 bits. Easy memory expansion is
provided by an active LOW chip enable (CE1), an active HIGH
chip enable (CE2), and active LOW output enable (OE) and
tri-state drivers. This device has an automatic power-down
feature (CE1 or CE2), reducing the power consumption by 70%
when deselected. The CY7C185 is in a standard 300-mil-wide
DIP, SOJ, or SOIC package.
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High speed
❐ 15 ns
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Fast tDOE
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Low active power
❐ 715 mW
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Low standby power
❐ 85 mW
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CMOS for optimum speed/power
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Easy memory expansion with CE1, CE2 and OE features
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TTL-compatible inputs and outputs
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Automatic power-down when deselected
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Available in non Pb-free 28-pin (300-Mil) Molded SOJ, 28-pin
(300-Mil) Molded SOIC and Pb-free 28-pin (300-Mil) Molded
DIP
An active LOW write enable signal (WE) controls the
writing/reading operation of the memory. When CE1 and WE
inputs are both LOW and CE2 is HIGH, data on the eight data
input/output pins (I/O0 through I/O7) is written into the memory
location addressed by the address present on the address pins
(A0 through A12). Reading the device is accomplished by
selecting the device and enabling the outputs, CE1 and OE
active LOW, CE2 active HIGH, while WE remains inactive or
HIGH. Under these conditions, the contents of the location
addressed by the information on address pins are present on the
eight data input or output pins.
The input or output pins remain in a high-impedance state unless
the chip is selected, outputs are enabled, and write enable (WE)
is HIGH. A die coat is used to insure alpha immunity.
For a complete list of related documentation, click here.
Logic Block Diagram
I/O0
I/O1
I/O2
SENSE AMPS
A1
A2
A3
A4
A5
A6
A7
A8
ROW DECODER
INPUT BUFFER
8K x 8
ARRAY
I/O3
I/O4
I/O5
I/O6
CE1
CE2
WE
COLUMN DECODER
POWER
DOWN
I/O7
A12
A11
A10
A0
A9
OE
Note
1. For guidelines on SRAM system design, please refer to the ‘System Design Guidelines’ Cypress application note, available on the internet at www.cypress.com.
Cypress Semiconductor Corporation
Document Number: 38-05043 Rev. *G
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198 Champion Court
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San Jose, CA 95134-1709
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408-943-2600
Revised November 26, 2014
