Cypress STK14C88-3 manual Features, Functional Description

STK14C88-3

256 Kbit (32K x 8) AutoStore nvSRAM

Features

■35 ns and 45 ns access times

■Automatic nonvolatile STORE on power loss

■Nonvolatile STORE under Hardware or Software control

■Automatic RECALL to SRAM on power up

■Unlimited Read/Write endurance

■Unlimited RECALL cycles

■1,000,000 STORE cycles

■100 year data retention

■Single 3.3V+0.3V power supply

■Commercial and Industrial Temperatures

■32-pin (300mil) SOIC and 32-pin (600 mil) PDIP packages

■RoHS compliance

Functional Description

The Cypress STK14C88-3 is a 256 Kb 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 opera- tions are also available under software control.

Logic Block Diagram					VCC	VCAP
			Quantum Trap
			512 X 512		POWER
A5
			STORE		CONTROL
A6	DECODER
A7			RECALL
A8					STORE/
A9			STATIC RAM		RECALL		HSB
			ARRAY
A11					CONTROL
	ROW		512 X 512
A12
A13
A14						SOFTWARE		A13 - A0
						DETECT
DQ0			COLUMN I/O
DQ1	BUFFERS		COLUMN DEC
DQ2
DQ3
DQ4
	INPUT
DQ5			A0 A1 A2 A3 A4 A10
DQ6
DQ7
								OE
								CE
								WE
Cypress Semiconductor Corporation		•	198 Champion Court	•	San Jose, CA 95134-1709		•	408-943-2600
Document Number: 001-50592 Rev. **						Revised January 29, 2009

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