Cypress Semiconductor STK11C68-5 Specification Sheet

Features
■
35 ns, 45 ns, and 55 ns access times
■
Pin compatible with industry standard SRAMs
■ Software initiated nonvolatile STORE
■ Unlimited Read and Write endurance
■ Automatic RECALL to SRAM on power up
■ Unlimited RECALL cycles
■
1,000,000 STORE cycles
■
100 year data retention
■ Single 5V ± 10% operation
■ Military temperature
■ 28-pin (300 mil) CDIP and 28-pad LCC packages
Logic Block Diagram
A
5
A
6
A
7
A
8
A
9
A
11
A
12
DQ
0
DQ
1
DQ
2
DQ
3
DQ
4
DQ
5
DQ
6
DQ
7
Cypress Semiconductor Corporation
Document Number: 001-51001 Rev. *A
64 Kbit (8K x 8) SoftStore nvSRAM

Functional Description

The Cypress STK11C68-5 is a 64 Kb fast static RAM with a
nonvolatile element in each memory cell. The embedded
nonvolatile elements incorporate QuantumTrap technology to
produce 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 under software control from
SRAM to the nonvolatile elements (the STORE operation). On
power up, data is automatically restored to the SRAM (the
RECALL operation) from the nonvolatile memory. RECALL
operations are also available under software control.
Quantum Trap
128 X 512
STORE
RECALL
STATIC RAM
ARRAY
128 X 512
COLUMN I/O
COLUMN DEC
A A
A A A A
0 1 2 3 4 10
• 198 Champion Court
STK11C68-5 (SMD5962-92324)
V V
CC
CAP
POWER
CONTROL
STORE/
HSB
RECALL
CONTROL
SOFTWARE
DETECT
,
• San Jose CA 95134-1709
-
A A
0
12
OE
CE
WE
• 408-943-2600
Revised April 07, 2009
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