Description
The AT28HC64B 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’s advanced nonvolatile CMOS technology, the device offers access times to 55 ns with power dissipation of just 220 mW. When the device is deselected, the CMOS standby current is less than 100 µA.

FEATUREs
• Fast Read Access Time – 70 ns
• Automatic Page Write Operation
    – Internal Address and Data Latches for 64 Bytes
• 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
• Low Power Dissipation
    – 40 mA Active Current
    – 100 µA CMOS Standby Current
• Hardware and Software Data Protection
• DATA Polling and Toggle Bit for End of Write Detection
• High Reliability CMOS Technology
    – Endurance: 100,000 Cycles
    – Data Retention: 10 Years
• Single 5 V ±10% Supply
• CMOS and TTL Compatible Inputs and Outputs
• JEDEC Approved Byte-wide Pinout
• Industrial Temperature Ranges
• Green (Pb/Halide-free) Packaging Option Only