Cypress Semiconductor Perform STK14D88 Manuel d'utilisateur

CY14B256L256 Kbit (32K x 8) nvSRAMCypress Semiconductor Corporation • 198 Champion Court • San Jose,CA 95134-1709 • 408-943-2600Document Number: 001-0

CY14B256LDocument Number: 001-06422 Rev. *I Page 10 of 19AC Switching Characteristics SRAM Read CycleParameterDescription25 ns 35 ns 45 ns UnitMin M

CY14B256LDocument Number: 001-06422 Rev. *I Page 11 of 19SRAM Write CycleParameterDescription25 ns 35 ns 45 ns UnitMin Max Min Max Min MaxCypressPar

CY14B256LDocument Number: 001-06422 Rev. *I Page 12 of 19AutoStore or Power Up RECALLParameter Alt DescriptionCY14B256LUnitMin MaxtHRECALL [12]tRESTOR

CY14B256LDocument Number: 001-06422 Rev. *I Page 13 of 19Software Controlled STORE/RECALL CycleThe software controlled STORE/RECALL cycle follows. [15

CY14B256LDocument Number: 001-06422 Rev. *I Page 14 of 19Hardware STORE CycleParameter Alt DescriptionCY14B256LUnitMin MaxtPHSBtHLHXHardware STORE Pul

CY14B256LDocument Number: 001-06422 Rev. *I Page 15 of 19Ordering InformationThese parts are not recommended for new designs.Speed(ns)Ordering Code Pa

CY14B256LDocument Number: 001-06422 Rev. *I Page 16 of 1945 CY14B256L-SZ45XCT 51-85127 32-pin SOIC CommercialCY14B256L-SZ45XC 51-85127 32-pin SOIC CY

CY14B256LDocument Number: 001-06422 Rev. *I Page 17 of 19Figure 15. 48-Pin (300 mil) Shrunk Small Outline Package (51-85061)Package Diagrams (continu

CY14B256LDocument Number: 001-06422 Rev. *I Page 18 of 19Document History PageDocument Title: CY14B256L 256 Kbit (32K x 8) nvSRAM Document Number: 001

Document Number: 001-06422 Rev. *I Revised November 26, 2009 Page 19 of 19AutoStore and QuantumTrap are registered trademarks of Cypress Semiconductor

CY14B256LDocument Number: 001-06422 Rev. *I Page 2 of 19ContentsFeatures ...

CY14B256LDocument Number: 001-06422 Rev. *I Page 3 of 19 Pin ConfigurationsFigure 1. Pin Diagram - 32-Pin SOIC and 48-Pin SSOPPin DefinitionsPin Nam

CY14B256LDocument Number: 001-06422 Rev. *I Page 4 of 19Device OperationThe CY14B256L nvSRAM is made up of two functional compo-nents paired in the sa

CY14B256LDocument Number: 001-06422 Rev. *I Page 5 of 19Hardware RECALL (Power Up)During power up or after any low power condition (VCC <VSWITCH),

CY14B256LDocument Number: 001-06422 Rev. *I Page 6 of 19Preventing StoreDisable the AutoStore function by initiating an AutoStore Disablesequence. A s

CY14B256LDocument Number: 001-06422 Rev. *I Page 7 of 19Table 1. Hardware Mode Selection CE WE OEA14 – A0Mode I/O PowerH X X X Not Selected Output Hi

CY14B256LDocument Number: 001-06422 Rev. *I Page 8 of 19Maximum RatingsExceeding maximum ratings may shorten the useful life of thedevice. These user

CY14B256LDocument Number: 001-06422 Rev. *I Page 9 of 19CapacitanceIn the following table, the capacitance parameters are listed.[5]Parameter Descript