Unlocking the Potential of the Microchip 93LC56B-I/ST 2K Microwire Serial EEPROM

In the realm of non-volatile memory, serial EEPROMs play a pivotal role in storing critical configuration, calibration, and data-logging information across a vast array of electronic applications. The Microchip 93LC56B-I/ST stands as a robust and reliable solution within this category, offering designers a perfect blend of density, simplicity, and endurance.

This integrated circuit is a 2K-bit Microwire Serial Electrically Erasable PROM, organized as 128 x 16-bit or 256 x 8-bit. Its Microwire serial interface is a simple, 3-wire synchronous protocol comprising Chip Select (CS), Serial Clock (SK), and Data Input/Output (DI/DO) lines. This simplicity significantly reduces the number of I/O pins required from the controlling microcontroller (MCU), making it an ideal choice for space-constrained and cost-sensitive designs. The device supports a wide voltage operation range (1.8V to 5.5V), ensuring compatibility with both modern low-power microcontrollers and legacy 5V systems.

A key feature of the 93LC56B is its built-in software and hardware write-protection mechanisms. The `ORG` pin allows the user to select the memory organization, while specific instruction sequences are required to initiate a write or erase cycle, preventing accidental data corruption. Furthermore, the entire memory array can be protected from writes by driving the `CS` pin to a specific mid-level voltage, adding an extra layer of security. With an endurance of 1 million erase/write cycles and a data retention period of over 200 years, this EEPROM is built for long-term reliability in demanding environments.

Housed in a compact 8-lead TSSOP (ST) package, the 93LC56B-I/ST is particularly suited for modern consumer electronics, automotive systems, industrial controls, and smart meters where board real estate is at a premium. Its low-power consumption in both active and standby modes further enhances its appeal for battery-powered applications.

ICGOODFIND: The Microchip 93LC56B-I/ST is a highly versatile and dependable 2K Microwire EEPROM. Its combination of a simple 3-wire interface, flexible organization, wide voltage support, and robust data integrity features makes it an excellent choice for designers seeking a non-volatile memory solution that is both easy to implement and incredibly durable.

Keywords: Microwire Serial Interface, Electrically Erasable PROM, Non-Volatile Memory, Wide Voltage Operation, Hardware Write-Protection