11LC040T-I/SN

Overview

The Microchip Technology 11LC040T-I/SN 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 clock frequencies up to 100 kHz. 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 industrial temperatures from -40°C to +85°C.

Feature Summary

• Supports the patented UNI/O single I/O serial bus protocol using Manchester encoding
• Includes a STATUS register with Write-In-Progress and Write Enable Latch bits
• Features built-in power-on/off data protection and block write protection capabilities

Applications

• Microcontroller system configuration storage
• Data logging in low-pin-count embedded devices
• Parameter storage in consumer electronics

Procurement Notes

Verify the specific ordering suffix 'I/MS' confirms the Industrial temperature range (-40°C to +85°C) and the 8-lead MSOP package type. Ensure compatibility with the master controller's ability to generate the required UNI/O Manchester encoded signals and standby pulses for proper bus synchronization.

Selection Notes

Select this component when a single-wire interface is required to minimize pin count on the host microcontroller. It is suitable for applications needing non-volatile storage with moderate endurance requirements. Consider the 16-byte page buffer size for write efficiency and ensure the operating voltage aligns with the 2.5 V to 5.5 V specification.

Part Context

This part belongs to the 11LCXXX family of serial EEPROMs from Microchip Technology. The family shares common architectural features such as the UNI/O interface and similar command sets, differing primarily in memory density and package options. The 11LC040 specifically offers 4 Kbit capacity within this lineup.

Replacement Considerations

Direct substitutes include other parts from the 11LC040 series with different packages or temperature grades, such as 11LC040-I/SN or 11LC040-E/MS. Verify that any replacement maintains the same UNI/O protocol support and electrical characteristics.