11LC161-I/P

Overview

The Microchip Technology 11LC161-I/P is a 16 Kbit serial electrically erasable programmable read-only memory (EEPROM) organized as 2048 x 8 bits. 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 PDIP package. Designed for industrial applications, it supports a temperature range from -40°C to +85°C.

Feature Summary

• Supports the UNI/O single I/O serial interface 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 Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce.
• Provides block write protection allowing configuration to protect none, one-quarter, one-half, or all of the memory array.

Applications

• Interfacing with microcontrollers requiring low-pin-count non-volatile storage
• ASIC designs needing simple serial EEPROM integration
• Industrial systems requiring robust noise immunity via Schmitt triggers

Procurement Notes

Verify that the specific part number suffix corresponds to the Industrial temperature grade (-40°C to +85°C) and the PDIP-8 through-hole package. Confirm the device address code matches the '1' variant (0xA1) required by your system design. Ensure the ordering suffix aligns with the manufacturer's current RoHS compliance and lead-free specifications.

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 where pin count minimization is critical. Consider the 100 kHz maximum bit rate and 16-byte page write buffer for throughput requirements. Verify that the 2.5 V minimum operating voltage meets the system's power supply constraints.

Part Context

This device belongs to the 11LCXXX family of 1 Kbit to 16 Kbit serial EEPROMs manufactured by Microchip Technology. The family shares common architectural features including the UNI/O protocol, high reliability endurance ratings, and similar command sets across various densities and package options.

Replacement Considerations

Compatible substitutes within the same family include the 11LC160-I/P, which differs primarily in the hardwired device address code (0xA0 vs 0xA1). Other density variants such as the 11LC080 or 11LC040 may be used if lower storage capacity is acceptable.