STK22C48_11 Datasheet, PDF (1/17 Pages) Cypress Semiconductor – 16-Kbit (2 K × 8) AutoStore™ nvSRAM

STK22C48
16-Kbit (2 K × 8) AutoStore™ nvSRAM
16-Kbit (2 K × 8) AutoStore nvSRAM
Features
Functional Description
■ 25 ns and 45 ns access times
The Cypress STK22C48 is a fast static RAM with a nonvolatile
■ Hands off automatic STORE on power-down with external
68 µF capacitor
element in each memory cell. The embedded nonvolatile
elements incorporate QuantumTrap technology producing the
world’s most reliable nonvolatile memory. The SRAM provides
■ 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 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
. ^{■ Unlimited read, write, and RECALL cycles}
nly ■ 1,000,000 STORE cycles to QuantumTrap
s ^o _{■ 100 year data retention to QuantumTrap}
ram ■ Single 5 V +10% operation
rog ■ Commercial and industrial temperatures
n ^p ■ 28-pin 300 mil and (330 mil) Small outline integrated circuit
. ^{tio (SOIC) package}
igns ^{duc ■ Restriction of hazardous substances (RoHS) compliant}
power-up, data is restored to the SRAM (the RECALL operation)
from the nonvolatile memory. A hardware STORE is initiated with
the HSB pin.
w ^{Desing pro Logic Block Diagram}
d ^{for Noert ongo A5}
de pp ^A6
en ^su A₇
m _{to A8}
com _tion ^A9
Quantum Trap
32 X 512
STORE
STATIC RAM
ARRAY
32 X 512
RECALL
V_CC
V_CAP
POWER
CONTROL
STORE/
RECALL
CONTROL
HSB
NoItnRperoduc _DQ0
COLUMN I/O
DQ ₁
DQ ₂
COLUMN DEC
DQ ₃
DQ ₄
DQ ₅
A₀ A₁ A₂ A₃ A₄ A₁₀
DQ ₆
DQ ₇
OE
CE
WE
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-51000 Rev. *D
• San Jose, CA 95134-1709 • 408-943-2600
Revised March 7, 2011
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