The AT28C256E-20JC is a 256-kilobit (32K x 8) Electrically Erasable Programmable Read-Only Memory (EEPROM) manufactured by Atmel. It is accessed through a parallel interface and provides non-volatile storage for applications requiring in-system programmability. This device is suitable for use in a variety of embedded systems and industrial applications.

Applications

• Embedded Systems: Storing firmware, boot code, and configuration data in microcontrollers and embedded processors.
• Industrial Control Systems: Storing calibration data, machine parameters, and operating instructions in programmable logic controllers (PLCs) and other industrial equipment.
• Telecommunications Equipment: Storing phone book data, system parameters, and software updates in telephone systems and networking devices.
• Data Acquisition Systems: Storing sensor data, measurement results, and system settings in data loggers and data acquisition units.
• Medical Devices: Storing patient data, equipment settings, and calibration information in medical instruments and devices.

Features

• Fast Access Time: 200 ns access time.
• Low Power Consumption: Active and standby modes for power conservation.
• In-System Reprogrammability: Electrically erasable and programmable, allowing for convenient firmware updates and data modification.
• Automatic Page Write: Simplifies the writing process and reduces write cycle time.
• Data Protection: Hardware and software write protection features to prevent accidental data corruption.
• High 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 a long period.
• Reduced Power Consumption: Low-power modes help to minimize energy consumption in battery-powered applications.
• Simplified System Design: Automatic page write simplifies memory write operations.
• Enhanced Data Security: Write protection features prevent unauthorized data modification.

Additional Details

The AT28C256E-20JC is typically packaged in a JEDEC 28-pin DIP (Dual In-Line Package) or a PLCC (Plastic Leaded Chip Carrier). It operates with a single 5V power supply. It features TTL-compatible inputs and outputs. The part features a READY/BUSY output signal to indicate the status of the write operation. Its page write capability allows for efficient data writing. The AT28C256E-20JC is well-suited for applications that need non-volatile memory with in-system reprogrammability and moderate access times.