STK15C88
32Kx8 PowerStore nvSRAM
FEATURES
DESCRIPTION
• 25, 45 ns Read Access & R/W Cycle Time
The Simtek STK15C88 is a 256Kb fast static RAM
with a non-volatile Quantum Trap storage element
included with each memory cell.
• Unlimited Read/Write Endurance
• Pin compatible with industry standard SRAMs
• Automatic Non-volatile STORE on Power Loss
• Automatic RECALL to SRAM on Power Up
The SRAM provides the fast access & cycle times,
ease of use and unlimited read & write endurance of
a normal SRAM.
• Non-Volatile STORE or RECALL under
Software Control
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.
• Unlimited RECALL Cycles
• 1 Million Store Cycles
• 100-Year Non-volatile Data Retention
• Single 5V ± 10% Power Supply
• Commercial and Industrial Temperatures
PowerStore nvSRAM products depend on the intrin-
sic system capacitance to maintain system power
long enough for an automatic store on power loss. If
the power ramp from 5 volts to 3.6 volts is faster
than 10 ms, consider our 14C88 or 16C88 for more
reliable operation.
• 28-pin 300-mil and 330 mil SOIC Packages
(RoHS-Compliant)
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
QUANTUM TRAP
512 x 512
STORE/
RECALL
CONTROL
A5
A6
A7
A8
STORE
RECALL
STATIC RAM
ARRAY
512 X 512
A9
A11
A12
A13
A14
SOFTWARE
DETECT
A13 – A0
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
COLUMN I/O
COLUMN DEC
A0 A1 A2 A3 A4 A10
G
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.
Rev 0.3
Document Control #ML0016
February, 2007
1
SIMTEK [ SIMTEK CORPORATION ]
