11LC040T-E/TT

Overview

The Microchip Technology 11LC040T-E/TT is a 4 Kbit (512 x 8) serial electrically erasable PROM 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 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 a 3-lead SOT-23 package and rated for an extended industrial temperature range of -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 Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce.
• Provides hardware block write protection allowing configuration to protect none, 1/4, 1/2, or all of the memory array.

Applications

• Interfacing with microcontrollers requiring a single I/O line for non-volatile storage
• ASIC applications needing low-pin-count serial EEPROM access
• Automotive electronic systems operating in high-temperature environments

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the device density corresponds to the 4Kbit capacity requirement. Ensure the supply voltage range aligns with the system's 2.5V to 5.5V operational limits. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select this component when a single-wire serial interface is necessary to minimize pin count on the host controller. Choose the Automotive (E) grade variant specifically for applications requiring operation up to +125°C. Consider the 16-byte page buffer size when designing write algorithms to optimize throughput. Verify compatibility with the master device's ability to generate the required UNI/O start headers and acknowledge sequences.

Part Context

This part belongs to the 11LCXXX family of serial EEPROMs from Microchip Technology. It shares the same UNI/O protocol architecture as other devices in the series, such as the 11LC020 and 11LC080, differing primarily in memory density and organization. The family utilizes a common instruction set and addressing scheme, facilitating design scalability across different storage requirements.

Replacement Considerations

Direct substitutes within the same UNI/O family include the 11LC020T-E/TT for lower density needs or the 11LC080T-E/TT for higher capacity. Cross-family replacements like the 11AA040 require verification of the lower 1.8V operating voltage capability and potential differences in device addressing codes.