Cypress STK14CA8 manual Features, Description, Logic Block Diagram

STK14CA8

128Kx8 AutoStore™ nvSRAM

Features

■25, 35, 45 ns Read Access and Read/Write Cycle Time

■Unlimited Read/Write Endurance

■Automatic Nonvolatile STORE on Power Loss

■Nonvolatile STORE Under Hardware or Software Control

■Automatic RECALL to SRAM on Power Up

■Unlimited RECALL Cycles

■200K STORE Cycles

■20-Year Nonvolatile Data Retention

■Single 3.0V + 20%, -10% Operation

■Commercial and Industrial Temperatures

■Small Footprint SOIC and SSOP Packages (RoHS Compliant)

Description

The Cypress STK14CA8 is a 1 Mb fast static RAM with a nonvol- atile QuantumTrap™ storage element included with each memory cell. This SRAM provides fast access and cycle times, ease of use, and unlimited read and write endurance of a normal SRAM.

Data transfers automatically to the nonvolatile storage 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.

The Cypress nvSRAM is the first monolithic nonvolatile memory to offer unlimited writes and reads. It is the highest performing and most reliable nonvolatile memory available.

Logic Block Diagram

			Quantum Trap		VCC	VCAP
A5			1024 X 1024		POWER
A6	DECODER		ARRAY	STORE	CONTROL
A12					RECALL
A7
A8			STATIC RAM		STORE/
A9				RECALL
A14	ROW		1024 X 1024		CONTROL		HSB
A13
A15						SOFTWARE
A16								A15 – A0
							DETECT
DQ0	BUFFERS		COLUMN I/O
DQ1
DQ2			COLUMN DEC
DQ3
DQ4	INPUT
DQ5		A0	A1 A2 A3 A4 A10	A11
DQ6
DQ7
								G
								E
								W

Cypress Semiconductor Corporation • 198 Champion Court	•	San Jose, CA 95134-1709	•	408-943-2600
Document Number: 001-51592 Rev. **		Revised March 04, 2009

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