The XC28C64J-25 is a 64K (8K x 8) CMOS EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by Xicor. This non-volatile memory chip is designed for applications requiring in-system programmability and erasure. The '25' in the part number typically indicates an access time of 250 ns.

Applications

• Storing configuration data in embedded systems
• Storing calibration data in instrumentation equipment
• Storing firmware updates in electronic devices
• Storing serial numbers or identification codes
• Replacing DIP switches or jumpers for configuration settings

Features

• 64K (8K x 8) EEPROM: Provides 65,536 bits of non-volatile storage organized as 8192 bytes.
• Fast access time: 250 ns access time allows for quick data retrieval.
• In-system programmability: Allows for reprogramming without removing the chip from the circuit.
• Byte-erasable: Individual bytes can be erased and reprogrammed.
• Low power consumption: CMOS technology minimizes power requirements.
• Automatic page write operation: Simplifies write operations.
• Data polling for end-of-write detection: Provides a mechanism to determine when a write operation is complete.
• JEDEC standard pinout: Ensures compatibility with other memory devices.

Benefits

• Flexible configuration: Allows for easy modification of system parameters.
• Reduced maintenance: Enables remote updates and eliminates the need for manual reprogramming.
• Improved reliability: Non-volatile storage ensures data retention even when power is lost.
• Simplified design: In-system programmability reduces the complexity of hardware design.
• Cost-effective solution: Provides a cost-efficient way to store and manage configuration data.

Additional Details

The XC28C64J-25 typically operates from a 5V power supply. It is available in a 28-pin DIP (Dual In-line Package). The device supports a page write mode, allowing multiple bytes to be written simultaneously. The data polling feature allows the host system to monitor the status of the write operation. The EEPROM technology allows for a limited number of write/erase cycles (typically 10,000 cycles per byte). Proper handling and storage procedures should be followed to prevent damage to the device. Detailed timing diagrams, electrical characteristics, and programming algorithms can be found in the manufacturer's datasheet. The device also includes protection features to prevent accidental data corruption during power-up or power-down.