11LC040T-E/MNY

Overview

The Microchip Technology 11LC040T-E/MNY is a 4 Kbit (512 x 8) serial EEPROM utilizing the UNI/O single-wire interface. It operates within a voltage range of 2.5 V to 5.5 V and supports a maximum bus frequency of 100 kHz. The device features a 16-byte page-write buffer, self-timed write cycles, and block write protection. It is housed in an MSOP-8 package and rated for an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• Supports the patented UNI/O single I/O serial protocol using Manchester encoding on a dedicated SCIO pin.
• Includes built-in power-on/off data protection circuitry and a write enable latch to prevent accidental writes.
• 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, one-quarter, one-half, or all of the memory array.

Applications

• Microcontroller system parameter storage
• Configuration data retention in embedded devices
• Calibration value storage in sensor modules

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm that the supply voltage requirements align with the target application's operating conditions. Ensure the design accounts for the single-wire interface timing constraints defined in the datasheet.

Selection Notes

Select this component when a single-pin serial interface is required to minimize pin count. Choose this part over the 11AA series if the application requires operation at voltages below 1.8 V, as the 11LC series minimum voltage is 2.5 V. Consider the MSOP-8 package dimensions for PCB layout constraints.

Part Context

This device belongs to the 11LC family of serial EEPROMs manufactured by Microchip Technology. The family includes various densities ranging from 1 Kbit to 16 Kbit, sharing common interface protocols and command sets while differing in memory organization and physical package options.

Replacement Considerations

Cross-reference with other 11LC040 variants such as 11LC040-I/MS or 11LC040-E/SN to verify package compatibility and temperature range alignment before substitution.

FAQ

How does the UNI/O interface manage clock and data signals?

The UNI/O interface combines the clock and data into a single serial bit stream (SCIO) using Manchester encoding techniques, allowing the receiver to extract the clock signal to decode timing and values.

What happens if a page write operation crosses a physical page boundary?

If a page write attempts to cross a boundary, the address counter rolls over to the beginning of the current page, causing further received data to overwrite previously stored data instead of writing to the next page.