The AT28C64B-25PI is a 64-kilobit (8K x 8) Electrically Erasable Programmable Read-Only Memory (EEPROM) from Atmel. It utilizes a parallel interface and offers non-volatile storage for applications that require in-system programmability. It's suitable for storing configuration data, firmware, and other critical information in embedded systems.

Applications

• Embedded Systems: Storing firmware, boot code, and configuration data in microcontrollers and other embedded devices.
• Industrial Control: Storing calibration data, machine parameters, and operating instructions in industrial equipment and programmable logic controllers (PLCs).
• Networking Equipment: Storing network configuration data, routing tables, and security settings.
• Telecommunications: Storing phone book data, system parameters, and software updates in telephone systems and communication devices.
• Automotive Electronics: Storing vehicle configuration parameters, diagnostic codes, and electronic control unit (ECU) settings.

Features

• Fast Access Time: 250 ns access time.
• Low Power Consumption: Active and standby modes to minimize power consumption.
• In-System Reprogrammability: Electrically erasable and programmable, enabling easy firmware updates and data modification.
• Automatic Page Write: Simplifies the write process and reduces write cycle time.
• Data Protection: Hardware and software write protection features to prevent accidental data corruption.
• Endurance: 10,000 write cycles per byte.
• Data Retention: 10 years data retention.

Benefits

• Easy Firmware Updates: In-system reprogrammability allows for convenient firmware updates without removing the device.
• Reliable Data Storage: High endurance and data retention ensure data integrity over long periods.
• Reduced Power Consumption: Low-power modes minimize energy consumption in battery-powered and energy-efficient applications.
• Simplified System Design: Automatic page write simplifies memory write operations.
• Enhanced Data Security: Write protection features prevent unauthorized data modification.

Additional Details

The AT28C64B-25PI is typically packaged in a JEDEC 28-pin DIP (Dual In-Line Package). It operates with a single 5V power supply. It supports TTL-compatible inputs and outputs. The device includes a READY/BUSY output pin to indicate the status of write operations. Its page write capability improves write efficiency. The AT28C64B-25PI is widely used for applications requiring non-volatile memory with in-system programming capabilities.