AT28HC64B-70TU

The Microchip Technology AT28HC64B-70TU is a high-performance, 64Kbit electrically-erasable and programmable read-only memory (EEPROM) organized as 8,192 words by 8 bits. Manufactured using advanced nonvolatile CMOS technology, this device offers fast read access times of 70 ns. It operates from a single 5V ±10% supply, making it suitable for a wide range of applications.

Key features include automatic page write operation with internal address and data latches for up to 64 bytes, and fast write cycle times. The device supports hardware and software data protection, along with DATA polling and toggle bit for end-of-write detection. Its high reliability CMOS technology ensures endurance of 100,000 cycles and data retention for 10 years.

Packaged in a 28-TSOP, the AT28HC64B-70TU is designed for surface mounting. It is compatible with CMOS and TTL inputs and outputs and operates within an industrial temperature range of -40°C to 85°C.

This EEPROM is accessed like a Static RAM for read or write cycles without external components. The device contains a 64-byte page register for simultaneous writing of up to 64 bytes. Addresses and data are internally latched during a write cycle, freeing the buses for other operations. The end of a write cycle can be detected by DATA polling of I/O7.