STK11C68 Datasheet, PDF (1/16 Pages) List of Unclassifed Manufacturers – 8K x 8 nvSRAM QuantumTrap™ CMOS Nonvolatile Static RAM

STK11C68
64 Kbit (8K x 8) SoftStore nvSRAM
Features
■ 25 ns, 35 ns, and 45 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
■ Commercial and industrial temperature
■ 28-pin (330 mil) SOIC package
■ 28-pin (300 mil) CDIP and 28-pad (350 mil) LCC packages
■ RoHS compliance
Functional Description
The Cypress STK11C68 is a 64Kb 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 under software control from SRAM to the nonvolatile
elements (the STORE operation). On power up, data is automat-
ically restored to the SRAM (the RECALL operation) from the
nonvolatile memory. RECALL operations are also available
under software control.
Logic Block Diagram
A₅
A₆
A₇
A₈
A₉
A ₁₁
A ₁₂
DQ ₀
DQ ₁
DQ ₂
DQ ₃
DQ ₄
DQ ₅
DQ ₆
DQ ₇
Quantum Trap
128 X 512
STORE
STATIC RAM
ARRAY
128 X 512
RECALL
COLUMN I/O
COLUMN DEC
A₀ A₁ A₂ A₃ A₄ A₁₀
V_CC
V_CAP
POWER
CONTROL
STORE/
RECALL
CONTROL
HSB
SOFTWARE
DETECT
- A0 A₁₂
OE
CE
WE
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-50638 Rev. **
• San Jose, CA 95134-1709 • 408-943-2600
Revised January 30, 2009
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