Microchip Technology 11LC080T-E/SN

Overview

11LC080T-E/SN from Microchip Technology Inc. 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 +125°C (Automotive E-temp), featuring 16-byte page write buffer, Schmitt-trigger SCIO input, and 100 kbps max bit rate. It delivers 1 µA standby current and supports block write protection for 0%, 25%, 50%, or 100% of memory array in SOT-23-3 package.

For engineers reviewing the 11LC080T-E/SN datasheet, 11LC080T-E/SN pinout, 11LC080T-E/SN application, or 11LC080T-E/SN equivalent, key selection considerations include its automotive-grade temperature range, UNI/O® protocol compatibility with PIC® MCUs, low-power operation under 2.5V–5.5V supply, and 1M endurance cycles with >200-year data retention - critical for infotainment, body control, and sensor calibration storage.

Technical Context

The 11LC080T-E/SN implements Manchester-encoded UNI/O® communication over a single bidirectional SCIO line, extracting clock and data from one signal stream. Its internal architecture includes a status register with WIP and WEL bits, page latches, and HV generator for EEPROM programming.

It uses slope-controlled output drivers to suppress ground bounce and Schmitt-trigger inputs for noise immunity. Write operations are self-timed with 5–10 ms completion, supporting byte or page writes with automatic erase, while block protection is controlled via BP0/BP1 bits in the STATUS register.

Key Specifications

Pinout & Package

11LC080T-E/SN is housed in a 3-lead SOT-23 package (suffix "SN"), with SCIO as the bidirectional serial I/O, VCC as supply voltage, and VSS as ground. No NC pins are present in this variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 11LC080T-E/SN, the 11AA080T-I/SN offers wider voltage support but lacks automotive temperature qualification, while the AT24C08D-SSHM-T provides I²C compatibility at the expense of noise immunity and single-pin simplicity - making 11LC080T-E/SN optimal for new E-grade UNI/O® designs prioritizing EMC resilience and layout efficiency.

Availability

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

Supply support for 11LC080T-E/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 a strong focus on automotive, industrial, and IoT applications.

The 11LCxxx family was designed specifically for space-constrained, noise-sensitive automotive subsystems requiring reliable, low-pin-count nonvolatile memory - leveraging UNI/O® to reduce MCU resource usage and improve EMC performance.

FAQ

What is the operating voltage range for the 11LC080T-E/SN?

The 11LC080T-E/SN operates from 2.5V to 5.5V DC. This range aligns with standard automotive battery and regulated 3.3V/5V rails, eliminating the need for external voltage translation. Operation below 2.5V is not supported - unlike the 11AA080 series, which extends down to 1.8V. The 11LC080T-E/SN's specified VCC range ensures stable UNI/O® communication and EEPROM write functionality across its full -40°C to +125°C automotive temperature grade.

Does the 11LC080T-E/SN support hardware write protection?

Yes, the 11LC080T-E/SN supports hardware-based block write protection via two nonvolatile BP0 and BP1 bits in its STATUS register. These bits enable locking 0%, 25%, 50%, or 100% of the memory array against accidental writes. Protection is enforced at the silicon level - independent of software state - and persists through power cycles. The 11LC080T-E/SN does not require continuous VCC to retain protection settings, and the WRSR command is used to configure them.

How many write/erase cycles can the 11LC080T-E/SN endure?

The 11LC080T-E/SN is rated for 1,000,000 erase/write cycles per memory location at 25°C and VCC = 5.5V. This endurance is validated per Microchip's characterization and applies to both byte and page writes. Real-world endurance in automotive applications remains robust due to the device's built-in wear-leveling avoidance mitigation and auto-erase architecture. The 11LC080T-E/SN's specification ensures reliable operation over the full vehicle service life, even with daily parameter updates.

What package type is used for the 11LC080T-E/SN?

The 11LC080T-E/SN uses a 3-lead SOT-23 package, denoted by the "SN" suffix in the part number. This compact surface-mount package measures 2.9 mm × 1.6 mm × 1.1 mm and features gull-wing leads compatible with standard reflow processes. It contains only three functional terminals: SCIO (pin 1), VSS (pin 2), and VCC (pin 3). No NC pins are present - unlike larger 8-lead variants - making it ideal for space-constrained automotive PCB layouts.

Is the 11LC080T-E/SN compatible with PIC® microcontrollers?

Yes, the 11LC080T-E/SN is fully compatible with Microchip's PIC® microcontrollers. Its UNI/O® protocol was co-developed with PIC® MCU GPIO timing capabilities in mind, and Microchip provides verified firmware libraries and application notes (e.g., AN1248) for seamless integration. The 11LC080T-E/SN's Manchester encoding, Schmitt-trigger input, and slope-controlled output ensure reliable bit-level synchronization with PIC®'s software-driven UNI/O® bit-banging implementations - even under electrical noise common in automotive environments.