CAT28C64B CATALYST [Catalyst Semiconductor], CAT28C64B Datasheet
CAT28C64B
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CAT28C64B Summary of contents
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... Fast Write Cycle Time: – 5ms Max. CMOS and TTL Compatible I/O Hardware and Software Write Protection DESCRIPTION The CAT28C64B is a fast, low power, 5V-only CMOS 2 Parallel E PROM organized 8-bits. It requires a simple interface for in-system programming. On-chip address and data latches, self-timed write cycle with ...
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PIN CONFIGURATION DIP Package ( ...
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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. with Respect to Ground ............... –2.0V ...
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D.C. OPERATING CHARACTERISTICS 10%, unless otherwise specified. CC Symbol Parameter I V Current (Operating, TTL ( Current (Operating, CMOS) CCC Current (Standby, TTL ( Current (Standby, ...
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A.C. CHARACTERISTICS, Read Cycle 10%, unless otherwise specified. CC Symbol Parameter t Read Cycle Time RC CE Access Time Address Access Time AA OE Access Time t OE (1) CE Low to Active Output ...
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A.C. CHARACTERISTICS, Write Cycle 10%, unless otherwise specified. CC Symbol Parameter t Write Cycle Time WC t Address Setup Time AS t Address Hold Time Setup Time Hold Time CH (2) ...
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... DEVICE OPERATION Read Data stored in the CAT28C64B is transferred to the data bus when WE is held high, and both OE and CE are held low. The data bus is set to a high impedance state when either goes high. This 2-line control architec- ture can be used to eliminate bus contention in a system environment ...
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... Page Write The page write mode of the CAT28C64B (essentially an extended BYTE WRITE mode) allows from bytes of data to be programmed within a single E cycle. This effectively reduces the byte-write time by a factor of 32. Following an initial WRITE operation (WE pulsed low, for t , and then high) the page write mode can begin by ...
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DATA Polling DATA polling is provided to indicate the completion of write cycle. Once a byte write or page write cycle is initiated, attempting to read the last byte written will output the complement of that data on I/O are ...
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... AC charac- INIT performed. The device is shipped from Catalyst with the software protection NOT ENABLED (the CAT28C64B is in the standard operating mode). Figure 10. Write Sequence for Deactivating Software Data Protection (1) ...
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... ID * -40˚C to +125˚C is available upon request Notes: (1) The device used in the above example is a CAT28C64BNI-15T (PLCC, Industrial temperature, 150 ns Access Time, Tape & Reel). To allow the user the ability to program the device with PROM programmer (or for testing purposes) there is a software command sequence for deactivating the data protection ...
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Doc. No. 25006-0A 2/98 P-1 12 ...