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STK12C68-5L35M Datasheet(PDF) 1 Page - Cypress Semiconductor

Part No. STK12C68-5L35M
Description  64 Kbit (8K x 8) AutoStore nvSRAM
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Maker  CYPRESS [Cypress Semiconductor]
Homepage  http://www.cypress.com
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STK12C68-5 (SMD5962-94599)
64 Kbit (8K x 8) AutoStore nvSRAM
Cypress Semiconductor Corporation
198 Champion Court
San Jose
, CA 95134-1709
408-943-2600
Document Number: 001-51026 Rev. **
Revised March 02, 2009
Features
35 ns and 55 ns access times
Hands off automatic STORE on power down with external
68 µF capacitor
STORE to QuantumTrap™ nonvolatile elements is initiated
by software, hardware, or AutoStore™ on power down
RECALL to SRAM initiated by software or power up
Unlimited Read, Write, and Recall cycles
1,000,000 STORE cycles to QuantumTrap
100 year data retention to QuantumTrap
Single 5V+10% operation
Military temperature
28-pin (300mil) CDIP and 28-pad LCC packages
Functional Description
The Cypress STK12C68-5 is a fast static RAM with a nonvol-
atile element in each memory cell. The embedded nonvolatile
elements incorporate QuantumTrap technology producing the
world’s most reliable nonvolatile memory. The SRAM provides
unlimited read and write cycles, while independent nonvolatile
data resides in the highly reliable QuantumTrap cell. Data
transfers from the SRAM to the nonvolatile elements (the
STORE operation) takes place automatically at power down.
On power up, data is restored to the SRAM (the RECALL
operation) from the nonvolatile memory. Both the STORE and
RECALL operations are also available under software control.
A hardware STORE is initiated with the HSB pin.
Logic Block Diagram
STORE/
RECALL
CONTROL
POWER
CONTROL
SOFTWARE
DETECT
STATIC RAM
ARRAY
128 X 512
Quantum Trap
128 X 512
STORE
RECALL
COLUMN I/O
COLUMN DEC
OE
CE
WE
HSB
VCC
VCAP
A0
- A12
A0 A1 A2 A3 A4 A10
A5
A6
A7
A8
A9
A11
A12
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
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