AT28C64B-15PU

Product Summary

The AT28C64B-15PU is a high-performance electrically-erasable and programmable readonly memory (EEPROM). Its 64K of memory is organized as 8,192 words by 8 bits. Manufactured with Atmel advanced nonvolatile CMOS technology, the AT28C64B-15PU offers access times to 150 ns with power dissipation of just 220 mW. When the AT28C64B-15PU is deselected, the CMOS standby current is less than 100 μA. The AT28C64B-15PU is accessed like a Static RAM for the read or write cycle without the need for external components. The AT28C64B-15PU contains a 64-byte page register to allow writing of up to 64 bytes simultaneously. During a write cycle, the addresses and 1 to 64 bytes of data are internally latched, freeing the address and data bus for other operations. Following the initiation of a write cycle, the device will automatically write the latched data using an internal control timer. The end of a write cycle can be detected by DATA POLLING of I/O7. Once the end of a write cycle has been detected, a new access for a read or write can begin.

Parametrics

AT28C64B-15PU absolute maximum ratings: (1) Storage Temperature: -65°C to +150°C; (2) All Input Voltages (including NC Pins) with Respect to Ground: -0.6V to +6.25V; (3) All Output Voltages with Respect to Ground: -0.6V to VCC + 0.6V; (4) Voltage on OE and A9 with Respect to Ground: -0.6V to +13.5V; (5) Temperature Under Bias: -55°C to +125°C.

Features

AT28C64B-15PU features: (1) Fast Read Access Time ?150 ns; (2) Automatic Page Write Operation: Internal Address and Data Latches for 64 Bytes; (3) Fast Write Cycle Times: Page Write Cycle Time: 10 ms Maximum (Standard)2 ms Maximum (Option ?Ref. AT28HC64BF Datasheet), 1 to 64-byte Page Write Operation; (4) Low Power Dissipation: 40 mA Active Current, 100 μs CMOS Standby Current; (5) Hardware and Software Data Protection; (6) DATA Polling and Toggle Bit for End of Write Detection; (7) High Reliability CMOS Technology: Endurance: 100,000 Cycles, Data Retention: 10 Years; (8) Single 5V ±10% Supply; (9) CMOS and TTL Compatible Inputs and Outputs; (10) JEDEC Approved Byte-wide Pinout; (11) Industrial Temperature Ranges; (12) Green (Pb/Halide-free) Packaging Option Only.

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