STK14C88-3 Datasheet, PDF (1/17 Pages) List of Unclassifed Manufacturers – 32K x 8 AutoStore™ nvSRAM QuantumTrap CMOS Nonvolatile StaticRAM

STK14C88-3
256 Kbit (32K x 8) AutoStore nvSRAM
Features
■ 35 ns and 45 ns access times
■ Automatic nonvolatile STORE on power loss
■ Nonvolatile STORE under Hardware or Software control
■ Automatic RECALL to SRAM on power up
■ Unlimited Read/Write endurance
■ Unlimited RECALL cycles
■ 1,000,000 STORE cycles
■ 100 year data retention
■ Single 3.3V+0.3V power supply
■ Commercial and Industrial Temperatures
■ 32-pin (300mil) SOIC and 32-pin (600 mil) PDIP packages
■ RoHS compliance
Functional Description
The Cypress STK14C88-3 is a 256 Kb fast static RAM with
a nonvolatile 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 opera-
tions are also available under software control.
Logic Block Diagram
A₅
A₆
A₇
A₈
A₉
A ₁₁
A ₁₂
A ₁₃
A ₁₄
Quantum Trap
512 X 512
STORE
STATIC RAM
ARRAY
512 X 512
RECALL
V_CC
V_CAP
POWER
CONTROL
STORE/
RECALL
CONTROL
HSB
SOFTWARE
DETECT
- A₁₃ A₀
DQ ₀
DQ ₁
DQ ₂
DQ ₃
DQ ₄
DQ ₅
DQ ₆
DQ ₇
COLUMN I/O
COLUMN DEC
A₀ A₁ A₂ A₃ A₄ A₁₀
OE
CE
WE
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-50592 Rev. **
• San Jose, CA 95134-1709 • 408-943-2600
Revised January 29, 2009
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