The AT93C46D is a 1-Kbit serial Electrically Erasable Programmable Read-Only Memory (EEPROM) utilizing a 3-wire serial interface, manufactured by Atmel (now Microchip Technology). It is designed for a variety of low-density, non-volatile data storage applications. While designated as END-OF-LIFE, it historically provided a compact and reliable solution for storing small amounts of data in embedded systems.

Applications

• Storage of configuration settings in consumer electronics.
• Storage of calibration data in instrumentation equipment.
• Storage of serial numbers and identification information.
• Storage of user preferences in various devices.
• Security code storage.

Features

• 1 Kbit (128 x 8 or 64 x 16) EEPROM.
• 3-wire Serial Interface.
• Low-voltage Operation.
• Self-Timed Write Cycle.
• High Reliability.
• Write Protect Feature.

Benefits

• Non-volatile storage ensures data retention even when power is removed.
• Simple 3-wire interface allows easy integration with microcontrollers.
• Low-voltage operation makes it suitable for battery-powered applications.
• Self-timed write cycle simplifies software control.
• High reliability ensures data integrity over a long lifespan.
• Write protect feature prevents accidental data corruption.

Additional Details

The AT93C46D offers flexibility in memory organization through an ORG pin, allowing selection between x8 and x16 modes. It features a self-timed write cycle, minimizing software overhead. The device is available in various packages, including SOIC and TSSOP. Key specifications include supply voltage range, operating temperature range, and endurance (number of write cycles). Being an end-of-life component, new designs should consider alternative memory solutions from Microchip Technology or other manufacturers. Legacy systems utilizing the AT93C46D may require careful management of existing inventory for ongoing maintenance and repairs. Detailed technical specifications are available in the device datasheet from Microchip Technology, including timing diagrams, electrical characteristics, and packaging information.