11LC161-E/SN

Overview

The Microchip Technology 11LC161-E/SN is a 16 Kbit serial electrically erasable programmable read-only memory (EEPROM) utilizing the UNI/O single-wire interface. It features a 2048 x 8 bit organization and operates within a supply voltage range of 2.5 V to 5.5 V. The device supports a maximum clock frequency of 100 kHz and includes a 16-byte page-write buffer. It offers high reliability with 1,000,000 erase/write cycles and data retention exceeding 200 years. The component is housed in an 8-lead SOIC package and is rated for automotive temperature ranges from -40°C to +125°C.

Feature Summary

• Supports the patented UNI/O single I/O serial bus protocol using Manchester encoding for combined clock and data transmission on the SCIO pin.
• Includes built-in write protection mechanisms such as power-on/off data protection circuitry and a write enable latch.
• Features block write protection allowing configuration to protect none, one-quarter, one-half, or all of the memory array.
• Incorporates Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce.

Applications

• Interfacing with microcontrollers requiring low-pin-count non-volatile storage
• Automotive electronic systems operating in extended temperature environments
• Data acquisition and control applications needing reliable parameter storage

Procurement Notes

Verify that the specific ordering suffix corresponds to the required package type and temperature grade. Confirm that the device address code matches the system requirements, as the '1' suffix indicates a hardwired device code distinct from other family members. Ensure compatibility with the master controller's ability to implement the UNI/O protocol timing and handshake sequences.

Selection Notes

Select this part when a single-wire interface is preferred over multi-wire protocols to minimize PCB trace count. Choose the automotive grade variant for applications requiring operation up to 125°C ambient temperature. Consider the 16-byte page buffer size for write efficiency and verify that the 2.5 V minimum supply voltage aligns with the system power rails.

Part Context

This component belongs to the 11LCXXX family of serial EEPROMs from Microchip Technology. The family provides densities ranging from 1 Kbit to 16 Kbit with organizations supporting x8-bit blocks. These devices are designed for low-power applications and utilize a unique single-line interface to reduce connection complexity compared to standard SPI or I2C memories.

Replacement Considerations

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