Microchip Technology 11LC080T-I/SN

Overview

11LC080T-I/SN from Microchip Technology Inc. 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, delivers 1 mA typical active current and 1 µA max standby current over –40°C to +85°C, and supports 100 kbps Manchester-encoded communication for embedded configuration storage in space-constrained industrial control modules.

For engineers reviewing the 11LC080T-I/SN datasheet, 11LC080T-I/SN pinout, 11LC080T-I/SN application, or 11LC080T-I/SN equivalent, key selection considerations include its 3-lead SOT-23 package, page-write buffer (16 bytes), STATUS register with WIP/WEL bits, block write protection (0/¼/½/all), and compatibility with microcontrollers lacking dedicated serial interfaces.

Technical Context

The 11LC080T-I/SN implements a Manchester-encoded, master-controlled UNI/O® bus protocol on a single SCIO pin, eliminating need for separate clock and data lines. Its internal architecture includes a 16-byte page latch, status register with write-enable latch and write-in-progress flag, and re-synchronization circuitry tolerant of ±0.5% per byte frequency drift and ±0.06 UI edge jitter.

It uses low-voltage CMOS technology with Schmitt-trigger SCIO input for noise immunity and slope-controlled output to suppress ground bounce. Write operations are self-timed (max 10 ms), support auto-erase, and enforce hardware write protection via power-on/off circuitry and configurable BP0/BP1 bits.

Key Specifications

Pinout & Package

11LC080T-I/SN is packaged in a 3-lead SOT-23 (SN) case with gull-wing leads, footprint-compatible with TO-92 but significantly smaller (2.9 mm × 1.6 mm × 1.1 mm). Pin 1 = SCIO, Pin 2 = VSS, Pin 3 = VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 11AA080T-I/SN, the 11LC080T-I/SN offers guaranteed 2.5V minimum operation for stable performance across wide supply variations, while 24LC08B-I/SN trades pin count and protocol simplicity for higher speed and broader ecosystem support - neither is pin- or protocol-compatible with 11LC080T-I/SN.

Availability

11LC080T-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, motor drive configuration storage, and medical device parameter backup requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 11LC080T-I/SN 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 emphasis on embedded control and reliability-critical applications.

The 11LC080T-I/SN belongs to Microchip's UNI/O® serial EEPROM family, designed specifically for ultra-low-pin-count systems where minimizing GPIO usage and board space is essential - especially in cost-sensitive industrial and consumer modules.

FAQ

What is the UNI/O® interface used by the 11LC080T-I/SN, and how does it differ from I²C or SPI?

The 11LC080T-I/SN uses Microchip's patented UNI/O® interface - a single-wire, Manchester-encoded serial bus that combines clock and data into one signal (SCIO). Unlike I²C (2-wire, open-drain) or SPI (4-wire, separate clock/data), UNI/O® requires only one GPIO, no external pull-ups, and no clock line. This reduces MCU pin count and PCB complexity, making the 11LC080T-I/SN ideal for 6- or 8-pin microcontrollers where resources are constrained.

Does the 11LC080T-I/SN support write protection, and how is it configured?

Yes, the 11LC080T-I/SN supports hardware-based block write protection via two nonvolatile BP0 and BP1 bits in its STATUS register. These bits can be set using the WRSR command to protect 0%, 25%, 50%, or 100% of the memory array. Protection is enforced independently of software control - even during power loss - ensuring critical calibration data stored in the 11LC080T-I/SN remains intact against accidental overwrites.

What is the maximum write speed and page size of the 11LC080T-I/SN?

The 11LC080T-I/SN supports a maximum bit rate of 100 kbps (equivalent to 100 kHz), with a page-write buffer size of 16 bytes. Each write operation - whether single-byte or up to 16-byte page write - completes in ≤10 ms (self-timed, including auto-erase). This means the 11LC080T-I/SN can sustain up to ~1,600 bytes/second in optimal burst conditions, sufficient for configuration updates without blocking host MCU execution.

Can the 11LC080T-I/SN operate reliably in noisy industrial environments?

Yes, the 11LC080T-I/SN is engineered for industrial noise immunity: its SCIO pin features Schmitt-trigger inputs (50 mV hysteresis minimum) to reject fast transients, and output slope control to limit ground bounce. With >4 kV HBM ESD rating, 1 µA max standby current, and operation down to 2.5V, the 11LC080T-I/SN maintains robust communication in motor drive, PLC, and factory automation settings where voltage ripple and EMI are common.

Is the 11LC080T-I/SN pin-compatible with other devices in the 11XX family, such as the 11LC040T-I/SN?

Yes, the 11LC080T-I/SN is pin-compatible with all 11XX-series devices in the same SOT-23 (SN) package, including 11LC010T-I/SN, 11LC020T-I/SN, 11LC040T-I/SN, and 11LC160T-I/SN. All share identical SCIO/VSS/VCC pinout, UNI/O® protocol, and electrical timing - enabling memory capacity upgrades on existing PCBs without layout changes, provided firmware handles the increased address space.