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X24C44D Datasheet(PDF) 1 Page - Xicor Inc. |
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X24C44D Datasheet(HTML) 1 Page - Xicor Inc. |
1 / 15 page X24C44 1 Serial Nonvolatile Static RAM © Xicor, Inc. 1991, 1995, 1996 Patents Pending Characteristics subject to change without notice 3832-1.5 6/19/96 T2/C1/D1 NS FEATURES • Advanced CMOS Version of Xicor’s X2444 • 16 x 16 Organization • Single 5 Volt Supply • Ideal for use with Single Chip Microcomputers —Static Timing —Minimum I/O Interface —Serial Port Compatible (COPS™, 8051) —Easily Interfaced to Microcontroller Ports • Software and Hardware Control of Nonvolatile Functions • Auto Recall on Power-Up • TTL and CMOS Compatible • Low Power Dissipation —Active Current: 10mA Maximum —Standby Current: 50 µA Maximum • 8-Lead PDIP, Cerdip, and 8-Lead SOIC Packages • High Reliability —Store Cycles: 1,000,000 —Data Retention: 100 Years FUNCTIONAL DIAGRAM 256 Bit X24C44 16 x 16 Bit NONVOLATILE E 2 PROM CONTROL LOGIC COLUMN DECODE ROW DECODE 4-BIT COUNTER INSTRUCTION DECODE INSTRUCTION REGISTER CE (1) DI (3) SK (2) DO (4) RECALL (6) STORE (7) STATIC RAM 256-BIT 3832 FHD F01 DESCRIPTION The Xicor X24C44 is a serial 256 bit NOVRAM featuring a static RAM configured 16 x 16, overlaid bit-by-bit with a nonvolatile E2PROM array. The X24C44 is fabricated with Xicor’s Advanced CMOS Floating Gate technology. The Xicor NOVRAM design allows data to be transferred between the two memory arrays by means of software commands or external hardware inputs. A store opera- tion (RAM data to E2PROM) is completed in 5ms or less and a recall operation (E2PROM data to RAM) is com- pleted in 2 µs or less. Xicor NOVRAMs are designed for unlimited write opera- tions to RAM, either from the host or recalls from E2PROM and a minimum 1,000,000 store operations. Inherent data retention is specified to be greater than 100 years. COPS is a trademark of National Semiconductor Corp. APPLICATION NOTES A V AILABLE AN3 • AN7 • AN8 • AN15 • AN16 • AN25 • AN29 • AN30 • AN35 • AN36 • AN39 • AN56 • AN69 |
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