11LC040T-I/MS

Overview

The Microchip Technology 11LC040T-I/MS is a 4 Kbit (512 x 8) serial electrically erasable programmable read-only memory (EEPROM). It utilizes the UNI/O single I/O bus interface with a maximum clock frequency of 100 kHz. The device operates within a supply voltage range of 2.5 V to 5.5 V and is housed in an 8-lead MSOP package. Designed for industrial applications, it supports temperatures from -40°C to +85°C.

Feature Summary

• Supports the UNI/O single I/O serial interface protocol using Manchester encoding on the SCIO pin.
• Includes built-in write protection mechanisms such as power-on/off data protection and a write enable latch.
• Features Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce.
• Provides block write protection allowing configuration to protect none, 1/4, 1/2, or all of the memory array.

Applications

• Interfacing with microcontrollers via discrete I/O lines configured for the UNI/O protocol
• ASIC communication requiring low-pin-count serial data storage
• Industrial systems operating within the specified temperature range

Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'MS' indicates the MSOP-8 package. Confirm the 'T' suffix denotes tape and reel packaging if required by assembly equipment. Ensure the specific part number matches the 4K density variant rather than other family members like the 11LC020 or 11LC160.

Selection Notes

Select this component when a single-wire serial interface is preferred over multi-wire protocols like I2C or SPI. It is suitable for applications requiring moderate data retention and endurance with low standby current consumption. Consider the 11AA series if operation below 2.5V is necessary, as the 11LC series requires a minimum of 2.5V.

Part Context

This device belongs to the 11XX family of 1 Kbit through 16 Kbit Serial EEPROMs manufactured by Microchip Technology. The family shares common architectural features including the UNI/O bus protocol, page-write buffers, and similar command sets, differing primarily in memory density and voltage ranges between the AA and LC sub-series.

Replacement Considerations

Public confirmed substitute part numbers: None identified in source material.