STK15C88

1

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.

Jan, 2008

Document Control #ML0016 Rev 2.0

FEATURES

• 25, 45 ns Read Access & R/W Cycle Time

• Unlimited Read/Write Endurance

• Pin compatible with industry standard SRAMs

• Automatic Non-volatile STORE on Power Loss

• Automatic RECALL to SRAM on Power Up

• Non-Volatile STORE or RECALL 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

• 28-pin 300-mil and 330 mil SOIC Packages

(RoHS-Compliant)

DESCRIPTION

The Simtek STK15C88 is a 256Kb fast static RAM

with a non-volatile 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.

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.

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

COLUMN DEC

G

E

W

COLUMN I/O

SOFTWARE

DETECT

QUANTUM TRAP

512 x 512

STATIC RAM

ARRAY

512 X 512

STORE

RECALL

STORE/

RECALL

CONTROL

32Kx8 PowerStore nvSRAM