CAT24C44 Catalyst Semiconductor, CAT24C44 Datasheet
CAT24C44
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CAT24C44 Summary of contents
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... RAM array to E PROM (STORE) and 2 from E PROM to RAM (RECALL). STORE operations are completed in 10ms max. and RECALL operations typically within 1.5 s. The CAT24C44 features unlimited RAM write operations either through external RAM 2 writes or internal recalls from E PROM. Internal false PIN CONFIGURATION ...
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BLOCK DIAGRAM ROW DECODE CE INSTRUCTION DI REGISTER SK INSTRUCTION DECODE (1)(2) MODE SELECTION STORE STORE STORE STORE STORE Mode (3) Hardware Recall 1 Software Recall 1 (3) Hardware Store 0 Software Store Don’t Care POWER-UP TIMING ...
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ABSOLUTE MAXIMUM RATINGS* Temperature Under Bias ................. – +125 C Storage Temperature ....................... – +150 C Voltage on Any Pin with (2) Respect to Ground ............. –2.0 to +VCC +2.0V V with Respect to Ground ............... ...
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A.C. CHARACTERISTICS 10%, unless otherwise specified. CC Symbol Parameter F SK Frequency Positive Pulse Width SKH t SK Negative Pulse Width SKL t Data Setup Time DS t Data Hold Time ...
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... The CE (Chip Enable) pin must remain high during the entire data transfer. The format for all instructions sent to the CAT24C44 is a logical ‘1’ start bit, 4 address bits (data read or write operations “Don’t Care” bits (device mode opera- tions), and a 3-bit op code (see Instruction Set) ...
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... WREN/WRDS The CAT24C44 powers up in the program disable state (the “write enable latch” is reset). Any programming after power-up or after a WRDS (RAM write/E store disable) instruction must first be preceded by the 2 WREN (RAM write/E PROM store enable) instruction. Once writing/storing is enabled, it will remain enabled ...
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... The “write enable” latch must be set (WREN instruction issued). • STO instruction issued or STORE input low. During the store operation, all other CAT24C44 func- tions are inhibited. Upon completion of the store opera- tion, the “write enable” latch is reset. The device also ...
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Figure 7. Non-Data Operations ORDERING INFORMATION Prefix Device # CAT 24C44 Optional Product Company ID Number * -40˚ to +125˚C is available upon request Notes: (1) The device used in the above example ...