11LC020T-E/SN

Overview

The Microchip Technology 11LC020T-E/SN is a 2 Kbit (256 x 8) serial EEPROM utilizing the UNI/O single I/O bus. It operates within a voltage range of 2.5 V to 5.5 V and supports a maximum clock frequency of 100 kHz. The device features Schmitt trigger inputs, output slope control, and block write protection. It is housed in an 8-lead SOIC package and rated for industrial temperatures from -40°C to +125°C.

Feature Summary

• Supports the patented UNI/O single I/O serial interface protocol using Manchester encoding.
• Includes built-in power-on/off data protection and a write enable latch mechanism.
• Features configurable block write protection allowing selection of none, 1/4, 1/2, or all array segments.
• Provides high reliability with specified endurance and long-term data retention capabilities.

Applications

• Microcontroller system configuration storage
• Calibration data retention in embedded devices
• Parameter logging in industrial sensors

Procurement Notes

Verify that the ordering suffix matches the required temperature grade and package type. Confirm the specific density variant aligns with the memory organization requirements. Ensure compatibility with the host controller's ability to implement the UNI/O protocol timing constraints.

Selection Notes

Select this component when a single-pin serial interface is preferred to minimize pin count. Consider the 2.5 V minimum supply voltage constraint compared to lower-voltage alternatives. Evaluate the page-write buffer size against application throughput needs.

Part Context

This part belongs to the 11LCXXX family of serial EEPROMs designed for low-pin-count applications. It shares architectural similarities with other UNI/O devices but offers specific density and voltage characteristics suitable for automotive and industrial environments requiring robust data retention.

Replacement Considerations

Consult official documentation for direct cross-references. Verify pinout and command set compatibility before substituting with similar UNI/O EEPROMs from other manufacturers.

FAQ

How does the UNI/O interface differ from standard SPI?

The UNI/O interface uses a single bidirectional I/O line (SCIO) for both clock and data, whereas SPI typically requires separate pins for clock, data in, and data out.

What is the function of the Write Enable Latch?

The Write Enable Latch must be set via the WREN instruction before any write operation can be executed, preventing accidental data corruption.