Microchip Technology 11LC080T-E/MNY

Overview

11LC080T-E/MNY 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 +125°C (Automotive E-temp), featuring 16-byte page write buffer, 1 µA max standby current, and Schmitt-trigger SCIO input for noise immunity. It serves as nonvolatile configuration storage in automotive body control modules requiring robust, low-pin-count memory.

For engineers reviewing the 11LC080T-E/MNY datasheet, 11LC080T-E/MNY pinout, 11LC080T-E/MNY application, or 11LC080T-E/MNY equivalent, key selection criteria include its Automotive-grade temperature range, UNI/O® protocol compatibility with discrete GPIO, 100 kbps bit rate, and block write protection covering 0%, 25%, 50%, or 100% of memory array.

Technical Context

The 11LC080T-E/MNY implements Manchester-encoded serial communication over a single SCIO line, extracting clock and data from one signal stream without external clock lines. Its internal architecture includes a status register with WIP and WEL flags, 16-byte page latches, and HV generator for EEPROM programming.

It supports dynamic re-synchronization during operation to tolerate ±0.50% frequency drift per byte and ±0.06 UI edge jitter. Write cycles are self-timed (max 10 ms), and the device enters Standby mode after NoMAK/SAK termination or explicit standby pulse (≥600 µs high on SCIO).

Key Specifications

Pinout & Package

11LC080T-E/MNY is packaged in 3-lead SOT-23 (MNY suffix), with SCIO, VSS, and VCC terminals. The package is surface-mount, RoHS-compliant, and optimized for space-constrained automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C08C-SSHM-T, 11LC080T-E/MNY saves one GPIO and eliminates pull-up resistors but trades off I²C ecosystem compatibility. Against 11AA080T-I/MNY, it delivers certified automotive operation at higher minimum VCC, making it the sole choice for under-hood deployment.

Availability

11LC080T-E/MNY is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor nodes, medical infusion pumps, and smart energy meters requiring stable component supply with AEC-Q100-aligned sourcing.

Supply support for 11LC080T-E/MNY 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 AEC-Q100 for automotive components.

The 11LCXXX family was designed specifically for automotive and industrial applications demanding minimal pin count, extended temperature operation, and robust serial communication in electrically noisy environments - with 11LC080T-E/MNY targeting E-temp EEPROM needs in safety-critical subsystems.

FAQ

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

The 11LC080T-E/MNY uses Microchip's patented UNI/O® bus, which combines clock and data onto a single SCIO line using Manchester encoding - eliminating separate clock, data-in, and data-out lines required by SPI or I²C. This reduces MCU pin usage to one GPIO, avoids pull-up resistors, and simplifies PCB routing. Unlike I²C, it has no address collision risk on shared buses due to hardwired device addressing (0xA0 for 11LC080T-E/MNY), and unlike SPI, it requires no chip-select signal.

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

Yes, the 11LC080T-E/MNY supports hardware block write protection via BP0 and BP1 bits in its STATUS register. These bits are set using the WRSR (Write Status Register) command and persist across power cycles. They enable protection of 0%, 25%, 50%, or 100% of the memory array - for example, locking the top 2 Kbits to prevent overwrite of bootloader configuration while allowing runtime updates to the remaining 6 Kbits. Protection is enforced at the silicon level and cannot be bypassed by software.

What is the maximum write speed and timing behavior of the 11LC080T-E/MNY during a page write operation?

A page write (up to 16 bytes) in the 11LC080T-E/MNY completes in ≤10 ms, as specified by TWC (Write Cycle Time). The device enters a busy state immediately upon receiving the terminating NoMAK, and the Write-In-Progress (WIP) bit in the STATUS register remains '1' until programming finishes. During this time, the SCIO line is unresponsive to new commands. The 16-byte page buffer allows burst loading before initiation, reducing host MCU overhead compared to byte-by-byte writes.

How does the 11LC080T-E/MNY handle power loss during a write cycle?

The 11LC080T-E/MNY incorporates built-in power-loss protection: if VCC drops below the write threshold during programming, the internal charge pump aborts the write and retains the pre-write data state. Additionally, the write-enable latch (WEL) resets on power-up, preventing accidental writes after brown-out recovery. Combined with the 1 µA max standby current, this ensures data integrity across unpredictable automotive battery transients without external supervision circuitry.

Is the 11LC080T-E/MNY AEC-Q100 qualified, and what does the 'E' in the part number signify?

Yes, the 'E' suffix in 11LC080T-E/MNY explicitly denotes Automotive qualification per AEC-Q100 Grade 1 (-40°C to +125°C), including stress testing for temperature cycling, HTOL, and ESD (>4 kV HBM). The 'E' distinguishes it from Industrial-grade variants (e.g., 11AA080T-I/MNY with 'I' suffix), confirming its suitability for under-hood, powertrain, and ADAS applications where extended temperature operation and long-term reliability are mandatory.