Microchip Technology 11LC010-I/MS

Overview

11LC010-I/MS from Microchip Technology Inc. is a 1 Kbit (128 × 8) serial EEPROM with UNI/O® single I/O bus interface, operating from 2.5V to 5.5V across -40°C to +85°C industrial temperature range. It features 16-byte page-write buffer, Schmitt-trigger SCIO input, and built-in write protection including power-on/off circuitry and STATUS register control. Used in embedded system configuration storage where minimal pin count and low standby current (<1 µA) are critical.

For engineers reviewing the 11LC010-I/MS datasheet, 11LC010-I/MS pinout, 11LC010-I/MS application, or 11LC010-I/MS equivalent, key selection factors include its 3-lead MSOP package, UNI/O® protocol timing tolerance (±0.5% frequency drift per byte), 100 kbps max bit rate, and block write-protection granularity (none/1/4/1/2/all array).

Technical Context

The 11LC010-I/MS implements Manchester-encoded UNI/O® communication over a single bidirectional SCIO line, eliminating need for separate clock and data lines. Its internal re-synchronization logic tracks master clock period during each start header and adjusts phase on every MAK edge to tolerate ±0.06 UI input jitter and ±5% cumulative frequency deviation per command.

It integrates a current-limited slope-controlled SCIO driver (±3 mA at 2.5V), 16-byte page buffer with automatic wrap-around within physical 16-byte pages, and nonvolatile STATUS register with WIP/WEL/BP0/BP1 bits. Write cycles are self-timed (max 10 ms), with endurance of 1 million erase/write cycles and >200-year data retention.

Key Specifications

Pinout & Package

11LC010-I/MS is packaged in an 8-lead MSOP (MS) with exposed pad, measuring 3.0 mm × 3.0 mm × 1.0 mm. Pin 1 is SCIO (bidirectional serial clock/data), Pin 2 is VSS (ground), Pin 3 is VCC (supply), and Pins 4–8 are no-connect (NC) terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 11AA010-I/MS, the 11LC010-I/MS provides higher VCC noise immunity above 2.5V but lacks sub-2.5V operation; versus AT21CS01-MSH-T, it delivers pin-count reduction and protocol simplicity at the cost of interface compatibility.

Availability

11LC010-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and consumer IoT settings storage requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 11LC010-I/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 manufacturer specializing in microcontrollers, analog devices, and memory products, with global manufacturing and quality certifications including ISO 9001 and AEC-Q200.

The 11LC010-I/MS belongs to Microchip's 11XX family of UNI/O® serial EEPROMs, designed specifically for space-constrained embedded systems needing reliable, low-pin-count nonvolatile storage with robust noise immunity and simplified firmware integration.

FAQ

What is the UNI/O® interface used by the 11LC010-I/MS, and how does it differ from I²C or SPI?

The 11LC010-I/MS uses Microchip's patented UNI/O® bus, which combines clock and data into a single bidirectional SCIO line using Manchester encoding. Unlike I²C (2-wire) or SPI (3–4 wires), UNI/O® requires only one I/O pin plus power/ground, reducing MCU pin usage and PCB routing complexity. The 11LC010-I/MS does not support I²C or SPI protocols natively - firmware must implement the UNI/O® state machine per DS22067J.

Can the 11LC010-I/MS operate at 1.8V, and what is the lowest valid supply voltage?

No, the 11LC010-I/MS has a minimum VCC of 2.5V and is not rated for 1.8V operation. Its specified VCC range is 2.5V to 5.5V across the industrial temperature range (-40°C to +85°C). For 1.8V systems, Microchip offers the pin-compatible 11AA010-I/MS, which shares identical density, page size, and UNI/O® protocol but supports 1.8–5.5V operation.

How does the 11LC010-I/MS handle write protection, and can it be configured to protect only part of the memory array?

The 11LC010-I/MS implements block write protection via two nonvolatile BP0/BP1 bits in its STATUS register, configurable through the WRSR instruction. These bits enable four protection modes: no protection (00), protect first 1/4 (01), protect first 1/2 (10), or protect entire array (11). This allows selective locking of calibration data or firmware parameters while leaving user settings writable - a feature confirmed in the DEVICE SELECTION TABLE and Section 4.5 of DS22067J.

What is the maximum write speed and timing behavior of the 11LC010-I/MS during a page write operation?

The 11LC010-I/MS supports up to 16-byte page writes with a maximum write cycle time of 10 ms (TWC) for full-page operations. Each byte written contributes to this fixed timeout - writing 1 byte or 16 bytes both require up to 10 ms to complete. The device asserts WIP=1 in the STATUS register during this period, allowing the host to poll completion without fixed delays. This behavior is documented in Table 1-2 (TWC parameter) and Figure 4-3 of DS22067J.

Is the 11LC010-I/MS RoHS compliant and qualified for automotive applications?

The 11LC010-I/MS is Pb-free and RoHS compliant per datasheet footnote. It is qualified for Industrial temperature range (-40°C to +85°C) and also offered in Automotive grade (E-temp, -40°C to +125°C) as 11LC010-E/MS - however, the -I/MS variant itself is not AEC-Q100 qualified. For automotive use, engineers must select the E-temp version and verify qualification status via Microchip's official automotive product documentation.