Cypress CY14B256L 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. *H Page 10 of 18SRAM Write CycleParameterDescription25 ns 35 ns 45 ns UnitMin Max Min Max Min MaxCypressPar

CY14B256LDocument Number: 001-06422 Rev. *H Page 11 of 18AutoStore or Power Up RECALLParameter Alt DescriptionCY14B256LUnitMin MaxtHRECALL [12]tRESTOR

CY14B256LDocument Number: 001-06422 Rev. *H Page 12 of 18Software Controlled STORE/RECALL CycleThe software controlled STORE/RECALL cycle follows. [15

CY14B256LDocument Number: 001-06422 Rev. *H Page 13 of 18Hardware STORE CycleParameter Alt DescriptionCY14B256LUnitMin MaxtPHSBtHLHXHardware STORE Pul

CY14B256LDocument Number: 001-06422 Rev. *H Page 14 of 18Ordering InformationSpeed(ns)Ordering Code Package Diagram Package TypeOperatingRange25 CY14B

CY14B256LDocument Number: 001-06422 Rev. *H Page 15 of 1845 CY14B256L-SZ45XCT 51-85127 32-pin SOIC CommercialCY14B256L-SZ45XC 51-85127 32-pin SOIC CY

CY14B256LDocument Number: 001-06422 Rev. *H Page 16 of 18Figure 15. 48-Pin (300 mil) Shrunk Small Outline Package (51-85061)Package Diagrams (continu

CY14B256LDocument Number: 001-06422 Rev. *H Page 17 of 18Document History PageDocument Title: CY14B256L 256 Kbit (32K x 8) nvSRAM Document Number: 001

Document Number: 001-06422 Rev. *H Revised January 30, 2009 Page 18 of 18AutoStore and QuantumTrap are registered trademarks of Cypress Semiconductor

CY14B256LDocument Number: 001-06422 Rev. *H Page 2 of 18Pin ConfigurationsFigure 1. Pin Diagram - 32-Pin SOIC and 48-Pin SSOPPin DefinitionsPin Name

CY14B256LDocument Number: 001-06422 Rev. *H Page 3 of 18Device OperationThe CY14B256L nvSRAM is made up of two functional compo-nents paired in the sa

CY14B256LDocument Number: 001-06422 Rev. *H Page 4 of 18once again exceeds the sense voltage of VSWITCH, a RECALLcycle is automatically initiated and

CY14B256LDocument Number: 001-06422 Rev. *H Page 5 of 18Preventing StoreDisable the AutoStore function by initiating an AutoStore Disablesequence. A s

CY14B256LDocument Number: 001-06422 Rev. *H Page 6 of 18Table 1. Hardware Mode Selection CE WE OEA14 – A0Mode IO PowerH X X X Not Selected Output Hig

CY14B256LDocument Number: 001-06422 Rev. *H Page 7 of 18Maximum RatingsExceeding maximum ratings may shorten the useful life of thedevice. These user

CY14B256LDocument Number: 001-06422 Rev. *H Page 8 of 18CapacitanceIn the following table, the capacitance parameters are listed.[5]Parameter Descript

CY14B256LDocument Number: 001-06422 Rev. *H Page 9 of 18AC Switching Characteristics SRAM Read CycleParameterDescription25 ns 35 ns 45 ns UnitMin Ma