X24C44 Datasheet (data sheet) PDF





X24C44 Datasheet, Serial Nonvolatile Static RAM

X24C44   X24C44  

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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 X24C44 256 Bit X24C44 Serial Nonvolatile Static RAM 16 x 16 Bit FEATURES DESCRIPTION The Xicor X24C44 is a serial 256 bit N OVRAM featuring a static RAM configured 16 x 16, overlaid bit-by-bit with a no nvolatile E2PROM array. The X24C44 is f abricated with Xicor’s Advanced CMOS Floating Gate technology. The Xicor NOV RAM design allows data to be transferre d between the two memory arrays by mean s of software commands or external hard ware inputs. A store operation (RAM dat a to E2PROM) is completed in 5ms or less and a reca

X24C44 Datasheet, Serial Nonvolatile Static RAM

X24C44   X24C44  
ll operation (E2PROM data to RAM) is com pleted in 2µs or less. 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. • • • • • • • • • • Advanced CMOS Version of X icor’s X2444 16 x 16 Organization Sin gle 5 Volt Supply Ideal for use with Si ngle Chip Microcomputers —Static Timi ng —Minimum I/O Interface —Serial P ort Compatible (COPS™, 8051) —Easil y Interfaced to Microcontroller Ports S oftware and Hardware Control of Nonvola tile Functions Auto Recall on Power-Up TTL and CMOS Compatible Low Power Dissi pation —Active Current: 10mA Maximum —Standby Current: 50µA Maximum 8-Lea d PDIP, Cerdip, and 8-Lead SOIC Package s High Reliability —Store Cycles: 1,0 00,000 —Data Retention: 100 Years FU NCTIONAL DIAGRAM NONVOLATILE 2 E PROM ST O STATIC RAM 256-BIT EC AL L R E ROW DECODE CONTROL LOGIC R RECALL (6) STORE (7) CE (1) DI (3) SK (2) I NSTRUCTION REGISTER COLUMN DECODE DO (4) INSTRUCTION DECODE 4-BIT COUNTER 3832 FHD F01 COPS is a trademark of N ational Semiconductor Corp. © Xicor, I nc. 1991, 1995, 1996 Patents Pending 38 32-1.5 6/19/96 T2/C1/D1 NS 1 Characteristics subject to change without notice X24C44 PIN DE








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