11LC040-I/SN

Overview

The Microchip Technology 11LC040-I/SN is a 4Kb (512 x 8) serial EEPROM utilizing the UNI/O single-wire interface. It operates within a supply voltage range of 2.5V to 5.5V and supports a maximum clock 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 8-SOIC 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 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 with selectable array segments

Applications

• Microcontroller system configuration storage
• Calibration data retention in embedded devices
• Low-pin-count sensor data logging
• Parameter storage in cost-sensitive consumer electronics

Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature range (-40°C to +85°C) and 'SN' denotes the 8-SOIC package. Confirm RoHS compliance status matches current manufacturing standards. Ensure the ordering code aligns with the required density and interface specifications before finalizing procurement.

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. Verify that the host controller can implement the UNI/O protocol timing constraints.

Part Context

This part belongs to the 11LCXXX family of serial EEPROMs from Microchip Technology. The family offers densities ranging from 1Kbit to 16Kbit. The 11LC series specifically supports voltages starting at 2.5V, distinguishing it from the 11AA series which supports lower voltages down to 1.8V. All variants share the same UNI/O interface architecture.

Replacement Considerations

Direct substitutes include other 11LC040 variants with different packages such as 11LC040-I/MS or 11LC040-I/PDIP. Cross-family replacements like 11AA040 require verification of voltage compatibility. Ensure any substitute maintains the UNI/O interface and SOIC footprint if pin compatibility is critical.