Cypress STK11C88 Manual de usuario descargar pdf

STK11C88

256 Kbit (32K x 8) SoftStore nvSRAM

Cypress Semiconductor Corporation • 198 Champion Court • San Jose

CA 95134-1709 • 408-943-2600

Document Number: 001-50591 Rev. ** Revised January 29, 2009

Features

■

25 ns and 45 ns access times

■

Pin compatible with industry standard SRAMs

■

Software initiated STORE and RECALL

■

Automatic RECALL to SRAM on power up

■

Unlimited Read and Write endurance

■

Unlimited RECALL cycles

■

1,000,000 STORE cycles

■

100 year data retention

■

Single 5V+10% power supply

■

Commercial and Industrial Temperatures

■

28-pin (300 mil and 330 mil) SOIC packages

■

RoHS compliance

Functional Description

The Cypress STK11C88 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 under Software control from

SRAM to the nonvolatile elements (the STORE operation). On

power up, data is automatically restored to the SRAM (the

RECALL operation) from the nonvolatile memory. RECALL

operations are also available under software control.

Logic Block Diagram

[+] Feedback

1 2 3 4 5 6 ... 14 15

STK11C88 1

Indice de contenidos

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STK11C88256 Kbit (32K x 8) SoftStore nvSRAMCypress Semiconductor Corporation • 198 Champion Court • San Jose,CA 95134-1709 • 408-943-2600Document Numb

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STK11C88Document Number: 001-50591 Rev. ** Page 10 of 15STORE INHIBIT or Power Up RECALLParameter Alt DescriptionSTK11C88UnitMin MaxtHRECALL [10]tREST

Pagina 3

STK11C88Document Number: 001-50591 Rev. ** Page 11 of 15Software Controlled STORE/RECALL CycleThe software controlled STORE/RECALL cycle follows. [11,

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STK11C88Document Number: 001-50591 Rev. ** Page 12 of 15Ordering InformationSpeed(ns)Ordering Code Package Diagram Package TypeOperatingRange25 STK11C

Pagina 5

STK11C88Document Number: 001-50591 Rev. ** Page 13 of 15Package DiagramsFigure 11. 28-Pin (300 mil) SOIC (51-85026)51 85127 *APIN 1 ID0.291[7.39]0.30

Pagina 6

STK11C88Document Number: 001-50591 Rev. ** Page 14 of 15Figure 12. 28-Pin (330 mil) SOIC (51-85058)Package Diagrams (continued)51-85058-*A[+] Feedbac

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Document Number: 001-50591 Rev. ** Revised January 29, 2009 Page 15 of 15AutoStore and QuantumTrap are registered trademarks of Cypress Semiconductor

Pagina 8

STK11C88Document Number: 001-50591 Rev. ** Page 2 of 15Pin ConfigurationsFigure 1. Pin Diagram - 28-Pin SOICTable 1. Pin Definitions - 28-Pin SOICPi

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STK11C88Document Number: 001-50591 Rev. ** Page 3 of 15Device OperationThe STK11C88 is a versatile memory chip that provides severalmodes of operation

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STK11C88Document Number: 001-50591 Rev. ** Page 4 of 15Hardware Protect The STK11C88 offers hardware protection against inadvertentSTORE operation an

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STK11C88Document Number: 001-50591 Rev. ** Page 5 of 15Table 2. Software STORE/RECALL Mode Selection CE WEA13 – A0Mode IO NotesL H 0x0E380x31C70x03E0

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STK11C88Document Number: 001-50591 Rev. ** Page 6 of 15Maximum RatingsExceeding maximum ratings may shorten the useful life of thedevice. These user g

Pagina 13

STK11C88Document Number: 001-50591 Rev. ** Page 7 of 15CapacitanceIn the following table, the capacitance parameters are listed.[4]Parameter Descripti

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STK11C88Document Number: 001-50591 Rev. ** Page 8 of 15AC Switching Characteristics SRAM Read CycleParameterDescription25 ns 45 ns UnitMin Max Min Ma

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STK11C88Document Number: 001-50591 Rev. ** Page 9 of 15SRAM Write CycleParameterDescription25 ns 45 ns UnitMin Max Min MaxCypressParameterAlttWCtAVAV