Cypress STK14C88-5 manual Features, Functional Description, Kbit 32K x 8 AutoStore nvSRAM

STK14C88-5

256 Kbit (32K x 8) AutoStore nvSRAM

Features

■35 ns and 45 ns access times

■Hands off automatic STORE on power down with external 68 µF capacitor

■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, WRITE, and RECALL cycles

■1,000,000 STORE cycles to QuantumTrap

■100 year data retention to QuantumTrap

■Single 5V+10% operation

■Military temperature

■32-pin (300 mil) CDIP and LCC (450 mil) packages

Functional Description

The Cypress STK14C88-5 is a fast static RAM with a nonvolatile 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 from the SRAM to the nonvolatile elements (the STORE operation) takes place automatically at power down. On power up, data is restored to the SRAM (the RECALL operation) from the nonvolatile memory. Both the STORE and RECALL operations are also available under software control. A hardware STORE is initiated with the HSB pin.

Logic Block Diagram			Quantum Trap	VCC	VCAP
			512 X 512	POWER
A5
			STORE	CONTROL
A6	DECODER
			ARRAY	CONTROL
A7
A8			RECALL	STORE/
A9			STATIC RAM	RECALL		HSB
A11	ROW		512 X 512
A13
A12
A14					SOFTWARE	A13 - A0
					DETECT
DQ0			COLUMN I/O
DQ1	BUFFERS	COLUMN DEC
DQ2
DQ3
DQ4	INPUT
DQ6		A0	A1 A2 A3 A4 A10
DQ5
DQ7
						OE
						CE
						WE

Cypress Semiconductor Corporation • 198 Champion Court	•	San Jose, CA 95134-1709	•	408-943-2600
Document Number: 001-51038 Rev. **		Revised March 02, 2009

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