Microchip Technology 11LC080-I/MS

Overview

11LC080-I/MS from Microchip Technology is an 8 Kbit (1,024 × 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, output slope control, and built-in write protection for use in space-constrained embedded systems requiring low-pin-count nonvolatile storage.

For engineers reviewing the 11LC080-I/MS datasheet, 11LC080-I/MS pinout, 11LC080-I/MS application, or 11LC080-I/MS equivalent, key selection considerations include its 3-lead MSOP package, 100 kbps UNI/O® bit rate, 1 µA max standby current, 1,000,000 erase/write endurance, and block write-protection configuration via STATUS register.

Technical Context

The 11LC080-I/MS implements Manchester-encoded UNI/O® protocol over a single bidirectional SCIO line, eliminating need for separate clock and data lines. Its internal timing recovery circuitry synchronizes to master clock period during each start header and re-synchronizes on every MAK bit to tolerate ±0.50% frequency drift per byte and ±0.06 UI edge jitter.

It integrates a current-limited, slope-controlled SCIO driver to suppress ground bounce, Schmitt-trigger input for noise immunity, and a status register with WIP, WEL, BP0/BP1 bits for real-time write-state monitoring and configurable 0%, 25%, 50%, or 100% array protection.

Key Specifications

Pinout & Package

11LC080-I/MS is housed in an 8-lead MSOP (MS) package with exposed pad, measuring 3.0 mm × 3.0 mm × 1.1 mm. Pin 1 is SCIO, Pin 2 is VSS, Pin 3 is VCC, and Pins 4–8 are NC (no connect).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 11AA080-I/MS, the 11LC080-I/MS provides higher VCC noise immunity but lacks sub-2.5V support; versus 24LC08B-I/MS, it saves one pin and simplifies firmware but requires UNI/O®-capable host drivers.

Availability

11LC080-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance configuration, medical device settings storage, and automotive body control module applications requiring stable component supply and long-term obsolescence management.

Supply support for 11LC080-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 leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 11LC080-I/MS belongs to Microchip's 11XX UNI/O® serial EEPROM family, designed specifically for space- and pin-constrained embedded systems needing reliable, low-power nonvolatile storage with minimal interconnect overhead.

FAQ

What is the UNI/O® interface used by the 11LC080-I/MS?

The 11LC080-I/MS uses Microchip's patented UNI/O® bus - a single-wire, Manchester-encoded serial interface that combines clock and data into one SCIO signal. This eliminates the need for a separate clock line, reduces PCB routing complexity, and enables communication using only one GPIO pin on the host microcontroller. The 11LC080-I/MS fully complies with UNI/O® Specification Rev C.

Does the 11LC080-I/MS support write protection, and how is it configured?

Yes, the 11LC080-I/MS supports hardware-configurable block write protection via two bits (BP0, BP1) in its STATUS register. These bits allow locking 0%, 25%, 50%, or 100% of the memory array against accidental writes. Protection is set using the WRSR command and persists through power cycles. The 11LC080-I/MS also includes built-in power-on/off write protection and a write-enable latch (WEL) that must be set before any write operation.

What is the maximum write speed and page size of the 11LC080-I/MS?

The 11LC080-I/MS supports a maximum UNI/O® bit rate of 100 kbps, enabling fast serial communication. Its page size is fixed at 16 bytes, allowing up to 16 contiguous bytes to be loaded into the internal write buffer before initiating a self-timed write cycle. The typical write cycle time is 5 ms for byte or page writes, and the device automatically handles erase-before-write internally.

Can the 11LC080-I/MS operate from a 3.3V supply, and what are its current consumption specs?

Yes, the 11LC080-I/MS operates across 2.5V to 5.5V, making it fully compatible with standard 3.3V systems. At VCC = 3.3V and TA = +85°C, its active read current is ≤1 mA, write current is ≤3 mA, and standby current is ≤1 µA. These low-power characteristics make the 11LC080-I/MS suitable for battery-backed or energy-efficient embedded designs.

Is the 11LC080-I/MS pin-compatible with other packages in the 11XX family?

The 11LC080-I/MS in MSOP (MS) package shares identical pinout (SCIO, VSS, VCC, NC×5) with other 8-lead variants like PDIP (P), SOIC (SN), TDFN (MN), and MSOP (MS) across the 11XX family. However, 3-lead SOT-23 (TT) and TO-92 (TO) versions have different pin counts and layouts - they are not pin-compatible. Always verify package code suffix (e.g., /MS) when substituting.