11LC020-I/MS

Overview

The Microchip Technology 11LC020-I/MS is a 2 Kbit serial electrically erasable programmable read-only memory (EEPROM) organized as 256 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 MSOP package. Designed for industrial applications, it supports a temperature range from -40°C to +85°C.

Feature Summary

• Supports the patented UNI/O single I/O serial bus protocol using Manchester encoding for combined clock and data transmission.
• 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 compact serial EEPROM integration
• Industrial systems operating within specified voltage and temperature ranges

Procurement Notes

Verify that the ordering suffix corresponds to the MSOP-8 package and Industrial temperature grade (-40°C to +85°C). Confirm the specific part number matches the 2 Kbit density requirement. Ensure compatibility with the UNI/O bus protocol for system integration. Check RoHS compliance status if required by project specifications.

Selection Notes

Select this component when a single-wire serial interface is preferred to minimize pin usage on the host controller. Choose the 11LC020-I/MS for applications requiring 2 Kbit of non-volatile storage with industrial temperature ratings. Consider the 2.5 V to 5.5 V operating range for voltage compatibility. Evaluate the 100 kHz maximum bit rate against system timing requirements.

Part Context

This device belongs to the 11XX family of serial EEPROMs, which includes densities ranging from 1 Kbit to 16 Kbit. The family shares common architectural features such as the UNI/O interface and page-write buffers. Other members include the 11LC010, 11LC040, and 11LC160 variants, offering different storage capacities while maintaining similar interface characteristics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

FAQ

How does the UNI/O interface manage clock and data signals?

The UNI/O interface combines the clock and data into a single serial bit stream (SCIO) using Manchester encoding techniques, allowing the receiver to extract the clock signal to decode timing and values.

What is the function of the STATUS register?

The STATUS register provides control information including the Write-In-Progress (WIP) bit, the Write Enable Latch (WEL) bit, and Block Protection (BP0/BP1) bits, which can be read at any time.