beautypg.com

Cypress STK11C68 User Manual

64 kbit (8k x 8) softstore nvsram, Stk11c68, Features

background image

STK11C68

64 Kbit (8K x 8) SoftStore nvSRAM

Cypress Semiconductor Corporation

198 Champion Court

San Jose

,

CA 95134-1709

408-943-2600

Document Number: 001-50638 Rev. **

Revised January 30, 2009

Features

25 ns, 35 ns, and 45 ns access times

Pin compatible with industry standard SRAMs

Software initiated nonvolatile STORE

Unlimited Read and Write endurance

Automatic RECALL to SRAM on power up

Unlimited RECALL cycles

1,000,000 STORE cycles

100 year data retention

Single 5V+10% operation

Commercial and industrial temperature

28-pin (330 mil) SOIC package

28-pin (300 mil) CDIP and 28-pad (350 mil) LCC packages

RoHS compliance

Functional Description

The Cypress STK11C68 is a 64Kb fast static RAM with a nonvol-
atile 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 under software control from SRAM to the nonvolatile
elements (the STORE operation). On power up, data is automat-
ically restored to the SRAM (the RECALL operation) from the
nonvolatile memory. RECALL operations are also available
under software control.

STORE/

RECALL

CONTROL

POWER

CONTROL

SOFTWARE

DETECT

STATIC RAM

ARRAY

128 X 512

Quantum Trap

128 X 512

STORE

RECALL

COLUMN I/O

COLUMN DEC

ROW DECODER

INPUT

BUFFERS

OE

CE
WE

HSB

V

CC

V

CAP

A

0

-

A

12

A

0

A

1

A

2

A

3

A

4

A

10

A

5

A

6

A

7

A

8

A

9

A

11

A

12

DQ

0

DQ

1

DQ

2

DQ

3

DQ

4

DQ

5

DQ

6

DQ

7

Logic Block Diagram

[+] Feedback