11LC040T-E/MS

Overview

The Microchip Technology 11LC040T-E/MS is a 4 Kbit (512 x 8) serial electrically erasable PROM utilizing the UNI/O single I/O bus. It operates within a 2.5 V to 5.5 V supply range and supports a maximum bit rate of 100 kbps. The device features a 16-byte page-write buffer, self-timed write cycles, and block write protection. It is housed in an 8-lead MSOP package and rated for automotive temperature ranges from -40°C to +125°C.

Feature Summary

• Supports the patented UNI/O single I/O serial interface using Manchester encoding.
• Includes built-in power-on/off data protection and a write enable latch.
• Features Schmitt trigger inputs for noise suppression and output slope control.
• Provides hardware block write protection for none, 1/4, 1/2, or all of the array.

Applications

• Interfacing with microcontrollers via discrete I/O lines
• ASIC communication systems
• Automotive electronic modules

Procurement Notes

Verify that the ordering suffix 'E' corresponds to the Automotive temperature grade (-40°C to +125°C) and 'MS' indicates the MSOP-8 package. Confirm the 'T' suffix aligns with the required tape-and-reel packaging format. Ensure the specific revision matches the DS22067J datasheet requirements for your design.

Selection Notes

Select this component when a single-wire serial interface is required to minimize pin count. It is suitable for applications needing non-volatile storage with high endurance and long data retention. Consider the 2.5 V minimum operating voltage when designing low-power circuits compared to 1.8 V variants.

Part Context

This part belongs to the 11LCXXX family of 1 Kbit through 16 Kbit serial EEPROMs. These devices share common architecture and command sets but differ in memory density and operating voltage ranges. The 11LC series specifically requires a minimum of 2.5 V, distinguishing it from the 11AA series which supports 1.8 V operation.

Replacement Considerations

Direct substitutes include other 11LC040 variants such as 11LC040-I/P or 11LC040-I/MS, provided the temperature grade and package type match the system requirements. Cross-family replacements like 11AA040 require verification of the lower 1.8 V operating capability.