64K (8K x 8) High-speed Parallel EEPROM with Page Write and Software Data Protection The AT28HC64B-70JU is a high-performance 64K (8K x 8) parallel EEPROM manufactured by ATMEL. Here are its key specifications:

- **Memory Size:** 64Kbit (8K x 8)
- **Access Time:** 70ns
- **Supply Voltage:** 5V ±10%
- **Operating Current:** 30mA (typical)
- **Standby Current:** 100μA (typical)
- **Data Retention:** 10 years (minimum)
- **Endurance:** 100,000 write cycles (minimum)
- **Interface:** Parallel
- **Package:** 32-lead PLCC (Plastic Leaded Chip Carrier)
- **Operating Temperature Range:** -40°C to +85°C
- **Technology:** CMOS
- **Write Time:** 10ms (typical)
- **Self-Timed Write Cycle:** Includes auto-erase and auto-write functions
- **Hardware and Software Data Protection:** Features to prevent accidental writes
- **Pin Compatibility:** JEDEC standard for byte-wide EPROMs

This device is designed for applications requiring high-speed read operations and reliable non-volatile storage.