Microchip Technology 11LC080T-E/MS

Overview

11LC080T-E/MS from Microchip Technology is an 8 Kbit (1,024 × 8) serial EEPROM using the UNI/O® single I/O bus interface. It operates from 2.5V to 5.5V, supports 100 kbps bit rate, features 16-byte page write buffer and STATUS register with Write-In-Progress and Write-Enable Latch bits, and is housed in an 8-lead MSOP package rated for automotive temperature range (−40°C to +125°C). It serves as nonvolatile configuration storage in automotive body control modules.

For engineers reviewing the 11LC080T-E/MS datasheet, 11LC080T-E/MS pinout, 11LC080T-E/MS application, or 11LC080T-E/MS equivalent, key selection considerations include its single-pin UNI/O® interface compatibility, automotive-grade temperature rating, 16-byte page write capability, block write protection options (none/¼/½/all), and 1,000,000 erase/write cycle endurance.

Technical Context

The 11LC080T-E/MS implements Manchester-encoded serial communication over a single SCIO line, extracting clock and data from one bidirectional signal. Its internal architecture includes a 16-byte page latch, STATUS register with WIP/WEL/BP bits, and current-limited slope-controlled output driver to suppress ground bounce.

It uses Schmitt-trigger inputs for noise immunity and supports re-synchronization on every MAK bit to tolerate up to ±0.50% frequency drift per byte and ±0.06 UI input edge jitter. Standby current is ≤1 µA at +125°C, and write cycle time is ≤10 ms for page or byte operations.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (MS suffix), 3.0 mm × 3.0 mm body, 0.65 mm pitch, exposed pad optional. Pin 1 marked via dot or bevel.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with 11AA080T-I/MS, the 11LC080T-E/MS provides automotive temperature qualification and higher minimum VCC (2.5V), trading 1.8V operation for robustness in harsh environments; versus AT24C08D-MAHM-T, it offers pin-count reduction via UNI/O® but requires protocol-specific firmware implementation.

Availability

11LC080T-E/MS is available at Aetrix Electronics and suitable for automotive body control, ADAS calibration storage, and engine management systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 11LC080T-E/MS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory products, with broad automotive AEC-Q100 qualification coverage.

The 11LCxxx family was designed specifically for cost-sensitive, space-constrained automotive and industrial applications requiring minimal GPIO usage and high reliability under thermal stress.

FAQ

What is the maximum bit rate supported by the 11LC080T-E/MS?

The 11LC080T-E/MS supports a maximum bit rate of 100 kbps, equivalent to a 100 kHz serial bus frequency. This is specified under AC characteristics with test conditions including CL = 100 pF and VCC = 2.5V to 5.5V. The device uses Manchester encoding to embed clock and data on the single SCIO line, and timing tolerances (e.g., ±0.50% frequency drift per byte) are defined to ensure reliable operation at this rate.

Does the 11LC080T-E/MS require external pull-up resistors on the SCIO line?

Yes, the 11LC080T-E/MS requires an external pull-up resistor on the SCIO line - typically 10 kΩ to VCC - to establish the high state during idle and standby modes. The SCIO pin is open-drain compatible and relies on this resistor for proper signal termination and noise margin, especially given its Schmitt-trigger input and Manchester encoding scheme.

How does the 11LC080T-E/MS handle power loss during a write operation?

The 11LC080T-E/MS incorporates built-in power-loss protection: write operations are inhibited during power ramp-up or ramp-down via internal circuitry. If VCC drops below the functional threshold mid-write, the internal charge pump and write sequencing halt, and the EEPROM array remains unaltered. No partial writes occur, and the STATUS register's WIP bit clears only upon successful completion - ensuring data integrity even during vehicle battery disconnect events.

Can the 11LC080T-E/MS be used alongside other UNI/O® devices on the same bus?

Yes, the 11LC080T-E/MS can share a single UNI/O® bus with other 11XX-family devices. Each device has a hardwired 4-bit device code: '0000' for 11XXXX0 parts like the 11LC080T-E/MS, and '0001' for 11XXXX1 variants. This allows up to two devices per bus without address conflict, provided the master correctly addresses the target device in the 8-bit device address byte (family code '1010' + device code).

What is the function of the NC pins on the 11LC080T-E/MS MSOP package?

The 11LC080T-E/MS in MSOP package has five NC (No Connect) pins - pins 1, 2, 3, 6, and 7 - which are internally unconnected and serve no electrical function. They must remain unconnected on the PCB; tying them to VCC, VSS, or other signals may cause unpredictable behavior or violate Microchip's layout recommendations. These pins exist for mechanical compatibility across the 11XX family's multi-package strategy.