11LC161T-I/SN

Overview

The Microchip Technology 11LC161T-I/SN is a 16 Kbit serial electrically erasable programmable read-only memory (EEPROM) utilizing the UNI/O single-wire interface. It features a 2,048 x 8 organization with a 16-byte page write buffer. The device operates within a supply voltage range of 2.5 V to 5.5 V and supports a maximum bus frequency of 100 kHz. Designed for industrial applications, it functions across a temperature range of -40°C to +85°C and is housed in an 8-lead SOIC package.

Feature Summary

• Supports the patented UNI/O single I/O serial interface protocol using Manchester encoding on a dedicated SCIO pin.
• Includes built-in write protection mechanisms such as power-on/off data protection and a configurable write enable latch.
• Features a 16-byte page-write buffer to optimize write throughput and reduce internal programming time.
• Provides block write protection capabilities allowing selective protection of none, one-quarter, one-half, or the entire memory array.

Applications

• Microcontroller system configuration storage
• Calibration data retention in embedded devices
• Parameter logging in industrial sensors

Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'SN' indicates the 8-lead SOIC package. Confirm the 'T' suffix denotes tape and reel packaging if required by assembly equipment. Ensure the specific revision matches the datasheet DS22067J for accurate electrical characteristics.

Selection Notes

Select this component when a single-wire interface is preferred to minimize pin count compared to standard I2C devices. Choose the 11LC161 variant over the 11AA161 if the application requires a minimum operating voltage of 2.5 V rather than 1.8 V. Consider the 16-byte page buffer size for write efficiency requirements.

Part Context

This part belongs to the 11XX family of serial EEPROMs from Microchip Technology. The family includes variants with different densities ranging from 1 Kbit to 16 Kbit and interfaces including UNI/O and I2C. The 11LC series specifically targets applications requiring a 2.5 V minimum supply voltage, distinguishing it from the 11AA series which supports lower voltages down to 1.8 V.

Replacement Considerations

The 11AA161T-I/SN serves as a functional substitute with identical memory architecture but supports a lower voltage range starting at 1.8 V. Other 11LC161 variants with different packages (e.g., MSOP, TDFN) are available if form factor changes are acceptable.