X24C45 Datasheet (data sheet) PDF





X24C45 Datasheet, Serial AUTOSTORE NOVRAM

X24C45   X24C45  

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APPLICATION NOTES A V A I L A B L E AN3 • AN7 • AN8 • AN15 • AN16 • A N25 • AN29 • AN30 • AN35 • AN36 • AN39 • AN56 • AN69 X24C45 256 Bit X24C45 Serial AUTOSTORE™ NOVRAM 16 x 16 Bit FEATURES DESCRIPTION Th e Xicor X24C45 is a serial 256 bit NOVR AM featuring a static RAM configured 16 x 16, overlaid bit-by-bit with a nonvo latile E2PROM array. The X24C45 is fabr icated with Xicor’s Advanced CMOS Flo ating Gate technology. The Xicor NOVRAM design allows data to be transferred b etween the two memory arrays by means o f software commands or external hardwar e inputs. A store operation (RAM data t o E2PROM) is completed in 5ms or less and a recall op

X24C45 Datasheet, Serial AUTOSTORE NOVRAM

X24C45   X24C45  
eration (E2PROM data to RAM) is complete d in 2µs or less. The X24C45 also incl udes the AUTOSTORE feature, a user sele ctable feature that automatically perfo rms a store operation when VCC falls be low a preset threshold. Xicor NOVRAMs a re designed for unlimited write operati ons to RAM, either from the host or rec alls from E2PROM and a minimum 1,000,00 0 store operations. Inherent data reten tion is specified to be greater than 10 0 years. • • • • • • • • • AUTOSTORE™ NOVRAM —Automat ically Performs a Store Operation Upon Loss of VCC Single 5 Volt Supply Ideal for use with Single Chip Microcomputers —Minimum I/O Interface —Serial Por t Compatible (COPS™, 8051) —Easily Interfaced to Microcontroller Ports Sof tware and Hardware Control of Nonvolati le Functions Auto Recall on Power-Up TT L and CMOS Compatible Low Power Dissipa tion —Active Current: 10mA —Standby Current: 50µA 8-Lead PDIP and 8-Lead SOIC Packages High Reliability —Store Cycles: 1,000,000 —Data Retention: 1 00 Years FUNCTIONAL DIAGRAM NONVOLATIL E 2 E PROM ST O STATIC RAM 256-BIT EC AL L R E ROW DECODE CONTROL LOGIC R RECALL (6) AS (7) CE (1) DI (3) S K (2) INSTRUCTION REGISTER COLUMN DEC ODE DO (4) INSTRUCTION DECODE 4-BIT COUNTER 3833 FHD F01 AUTOSTORE™ NOVRAM is a trademark of Xicor, Inc. COPS is a trademark








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