STK22C48_08 Datasheet, PDF (1/16 Pages) Simtek Corporation – 2Kx8 AutoStore nvSRAM

FEATURES
• 25, 45 ns Read Access & R/W Cycle Times
• Unlimited Read/Write Endurance
• Automatic Non-Volatile STORE on Power Loss
• Non-Volatile STORE Under Hardware Control
• Automatic RECALL to SRAM on Power Up
• Unlimited RECALL Cycles
• 1 Million STORE Cycles
• 100-Year Non-volatile Data Retention
• Single 5.0V +10% Operation
• Commercial, Industrial, and Military
Temperatures
• 28-Pin 300 mil SOIC or 330 mil SOIC (RoHS-
Compliant)
STK22C48
2Kx8 AutoStore nvSRAM
DESCRIPTION
The Simtek STK22C48 is a 16Kb fast static RAM with
a nonvolatile Quantum Trap storage element included
with each memory cell.
The SRAM provides the fast access & cycle times,
ease of use, and unlimited read & write endurance of
a normal SRAM.
Data transfers automatically to the non-volatile stor-
age cells when power loss is detected (the STORE
operation). On power-up, data is automatically
restored to the SRAM (the RECALL operation). Both
STORE and RECALL operations are also available
under software control.
The Simtek nvSRAM is the first monolithic non-vola-
tile memory to offer unlimited writes and reads. It is
the highest-performance, most reliable non-volatile
memory available.
BLOCK DIAGRAM
V_CCX V_CAP
Quantum Trap
32 x 512
POWER
CONTROL
A₅
STORE
STORE/
A₆
A₇
STATIC RAM
ARRAY
RECALL
RECALL
CONTROL
HSB
A₈
32 x 512
A₉
DQ₀
DQ₁
DQ₂
COLUMN I/O
COLUMN DEC
DQ₃
DQ₄
DQ₅
DQ₆
A₀ A₁ A₂ A₃ A₄ A₁₀
G
DQ₇
E
W
This product conforms to specifications per the
terms of Simtek standard warranty. The product
has completed Simtek internal qualification testing
and has reached production status.
1
Document Control #ML0004 Rev 2.0
Feb, 2008