Microchip Technology 11LC010T-I/TT

Overview

11LC010T-I/TT from Microchip Technology Inc. is a 1 Kbit (128 × 8) serial EEPROM using the UNI/O® single I/O bus interface, operating from 2.5V to 5.5V with 1 mA typical active current and 1 µA max standby current over –40°C to +85°C. It features Manchester-encoded communication, 16-byte page-write buffer, and hardware write protection for use in space-constrained embedded control and sensor calibration storage.

For engineers reviewing the 11LC010T-I/TT datasheet, 11LC010T-I/TT pinout, 11LC010T-I/TT application, or 11LC010T-I/TT equivalent, key selection considerations include its 3-lead SOT-23 (TT) package, UNI/O® protocol timing tolerance (±0.5% frequency drift per byte), Schmitt-trigger SCIO input, and industrial temperature rating - all critical for low-pin-count, noise-immune memory integration in automotive body controllers and IoT endpoint firmware storage.

Technical Context

The 11LC010T-I/TT implements a Manchester-encoded, master-controlled UNI/O® bus where clock and data share the SCIO line; synchronization occurs via start-header detection and re-synchronization on every MAK bit. Its internal architecture includes a 16-byte page latch, STATUS register with WIP/WEL/BP bits, and current-limited slope-controlled output driver to suppress ground bounce.

It supports byte/page writes with self-timed erase/write cycles (max 10 ms), block write protection (none/¼/½/all array), and built-in power-on/off data protection. The device requires no external clock or address lines - only SCIO, VCC, and VSS - making it suitable for microcontroller GPIO-constrained designs requiring reliable nonvolatile storage.

Key Specifications

Pinout & Package

11LC010T-I/TT is packaged in a 3-lead SOT-23 (TT) with top-side marking and standard JEDEC MO-178 footprint. Pin 1 = SCIO, Pin 2 = VCC, Pin 3 = VSS - no NC pins; compact 2.9 mm × 1.6 mm × 1.1 mm profile suits high-density layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 11AA010T-I/TT, the 11LC010T-I/TT trades 1.8V support for guaranteed 2.5V minimum operation and automotive qualification - making it more robust in noisy 5V industrial buses. Against 24LC01B-I/OT, it delivers identical memory size in 37% less board area and eliminates I²C arbitration overhead, though requiring UNI/O®-capable firmware.

Availability

11LC010T-I/TT is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, medical device parameter backup, and smart meter firmware storage requiring stable component supply across extended product lifecycles.

Supply support for 11LC010T-I/TT 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 solutions, with a focus on embedded control and connectivity.

The 11LC010T-I/TT belongs to Microchip's 11XX family of UNI/O®-interface serial EEPROMs, designed specifically for ultra-low-pin-count, noise-immune nonvolatile storage in cost-sensitive and space-constrained embedded systems.

FAQ

What is the UNI/O® interface used by the 11LC010T-I/TT, and how does it differ from I²C or SPI?

The 11LC010T-I/TT uses Microchip's patented UNI/O® bus - a single-wire, Manchester-encoded serial interface where clock and data are combined on the SCIO line. Unlike I²C (2-wire, open-drain) or SPI (4-wire, synchronous), UNI/O® requires only one I/O pin plus power/ground, eliminating external pull-ups, clock lines, and address decoding. This reduces routing complexity and improves noise immunity in electrically harsh environments - a key advantage of the 11LC010T-I/TT over multi-pin alternatives.

Does the 11LC010T-I/TT support write protection, and how is it configured?

Yes, the 11LC010T-I/TT supports configurable block write protection via its STATUS register (BP0/BP1 bits). Using the WRSR command, users can protect none, 1/4, 1/2, or all of the 128-byte memory array. Protection is nonvolatile and persists through power cycles. The 11LC010T-I/TT also includes built-in hardware write protection activated during power-up/down transitions, ensuring data integrity even during brown-out conditions - a critical feature for safety-critical applications using the 11LC010T-I/TT.

What is the maximum write speed and page size of the 11LC010T-I/TT?

The 11LC010T-I/TT supports a maximum serial bus frequency of 100 kHz (100 kbps), resulting in a typical bit period of 10 µs. Its page-write buffer holds up to 16 bytes, enabling burst writes within a single physical page (addresses 0x00–0x0F, 0x10–0x1F, etc.). Write cycle time is ≤10 ms per page or byte. Because the 11LC010T-I/TT enforces page boundaries strictly, crossing a 16-byte boundary wraps data to the start of the current page - requiring firmware to align writes to avoid unintended overwrites.

Can the 11LC010T-I/TT operate reliably in automotive environments?

Yes, the 11LC010T-I/TT is qualified for Automotive (E-temp) operation from –40°C to +125°C and meets AEC-Q100 stress test requirements. Its design includes Schmitt-trigger inputs, 50 ns spike suppression, output slope control to eliminate ground bounce, and >4 kV HBM ESD protection - all validated for under-hood and chassis-mounted applications. The 11LC010T-I/TT's 2.5–5.5V supply range accommodates automotive battery transients, and its >200-year data retention ensures calibration data survives full vehicle service life.

How does the 11LC010T-I/TT handle power loss during a write operation?

The 11LC010T-I/TT incorporates built-in power-loss write protection circuitry that monitors VCC and aborts incomplete writes if supply drops below safe threshold. Combined with the write enable latch (WEL) - which must be explicitly set via WREN before each write - this ensures no partial or corrupted data is committed to memory. Additionally, the 11LC010T-I/TT's STATUS register provides real-time WIP bit visibility, allowing host firmware to poll completion status and delay power-down until Twc (≤10 ms) has elapsed - guaranteeing atomicity for the 11LC010T-I/TT's write operations.