11LC161-E/P

Overview

The Microchip Technology 11LC161-E/P is a 16 Kbit serial electrically erasable programmable read-only memory (EEPROM) organized as 2048 x 8 bits. It operates within a supply voltage range of 2.5 V to 5.5 V and supports a maximum clock frequency of 100 kHz via the UNI/O single I/O bus interface. The device utilizes Manchester encoding for data transmission over the SCIO pin. It features Schmitt trigger inputs, output slope control, and block write protection capabilities. The component is housed in an 8-lead PDIP package and is rated for an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• Supports the patented UNI/O single I/O serial bus protocol using Manchester encoding on the SCIO pin.
• Includes built-in power-on/off data protection circuitry and a write enable latch for array security.
• Features a STATUS register allowing dynamic monitoring of write-in-progress status and block protection settings.
• Provides high reliability with specified endurance of one million erase/write cycles and data retention exceeding two hundred years.

Applications

• Interfacing with microcontrollers requiring low-pin-count non-volatile storage
• ASIC applications needing simple serial configuration memory
• Industrial systems requiring robust data retention under extreme temperatures

Procurement Notes

Verify that the specific ordering suffix 'E' corresponds to the Automotive temperature grade (-40°C to +125°C) rather than the Industrial grade. Confirm the 'P' suffix indicates the 8-lead PDIP through-hole package type. Ensure the datasheet revision matches the required electrical characteristics for your design constraints.

Selection Notes

Select this part when a single bidirectional I/O line is preferred over standard multi-wire interfaces like SPI or I2C. The 11LC161 variant is distinct from the 11LC160 due to its unique device address code, allowing multiple density variants on the same bus without conflict. Verify that the system can handle the self-timed write cycle duration before initiating new commands.

Part Context

This component belongs to the 11XX family of serial EEPROMs manufactured by Microchip Technology. The family includes various densities ranging from 1 Kbit to 16 Kbit. The 11LC series specifically supports a minimum operating voltage of 2.5 V, distinguishing it from the 11AA series which supports lower voltages down to 1.8 V.

Replacement Considerations

The 11LC160-I/MS is a similar density device but uses a different device address ('0000' vs '0001'). Substitution requires software modification to accommodate the address change. Other family members like the 11LC080 offer lower capacity with identical interface protocols.