Microchip Technology 11LC020T-I/MS

Overview

11LC020T-I/MS from Microchip Technology Inc. is a 2 Kbit (256 × 8) serial EEPROM with UNI/O® single I/O bus interface, operating from 2.5V to 5.5V over -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. Used in embedded system parameter storage where minimal pin count and low power are critical.

For engineers reviewing the 11LC020T-I/MS datasheet, 11LC020T-I/MS pinout, 11LC020T-I/MS application, or 11LC020T-I/MS equivalent, key selection considerations include UNI/O® bus compatibility, 2.5–5.5V supply operation, 100 kbps max bit rate, 1 µA standby current, and MSOP-8 package footprint for space-constrained PCB layouts.

Technical Context

The 11LC020T-I/MS implements Manchester-encoded UNI/O® protocol on a single bidirectional SCIO line, eliminating need for separate clock and data lines. Its internal timing recovery circuitry tolerates ±0.50% frequency drift per byte and ±0.06 UI input edge jitter, enabling robust communication with low-cost microcontroller GPIOs.

It integrates a write-enable latch, STATUS register (WIP/WEL/BP bits), and block write protection (none/1/4/1/2/all array). Write cycles are self-timed (max 10 ms), with 1,000,000 endurance and >200-year data retention - validated at 25°C and 5.5V.

Key Specifications

Pinout & Package

11LC020T-I/MS is packaged in an 8-lead MSOP (MS) package with exposed pad - compact 3 mm × 3 mm footprint, 0.65 mm pitch, and thermal enhancement for sustained write operations.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 11AA020T-I/MS, the 11LC020T-I/MS trades wider voltage flexibility for guaranteed 2.5V+ operation - simplifying power design in 3.3V/5V systems. Against 24LC02BT-I/MS, it reduces pin count and EMI susceptibility but requires UNI/O®-capable firmware stack.

Availability

11LC020T-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart home actuator memory requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 11LC020T-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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory products for embedded control applications.

The 11LC020T-I/MS belongs to Microchip's UNI/O® serial EEPROM family, designed specifically for space- and pin-constrained systems needing reliable, low-power nonvolatile storage with minimal MCU resource usage.

FAQ

What is the UNI/O® interface used by the 11LC020T-I/MS, and how does it differ from I²C or SPI?

The 11LC020T-I/MS uses Microchip's patented UNI/O® bus - a single-wire, Manchester-encoded serial interface that combines clock and data on the SCIO pin. Unlike I²C (2-wire) or SPI (3–4 wires), UNI/O® eliminates dedicated clock lines and address pins, reducing MCU pin count and PCB routing complexity. It operates at up to 100 kbps and requires no external clock source, making it ideal for ultra-low-pin-count microcontrollers.

Does the 11LC020T-I/MS support write protection, and how is it configured?

Yes, the 11LC020T-I/MS supports hardware-based block write protection via two nonvolatile BP0/BP1 bits in its STATUS register. These bits can be programmed using the WRSR command to protect none, 1/4, 1/2, or all of the 256-byte memory array. Protection is active immediately after write and persists through power cycles - preventing accidental or malicious overwrites of critical calibration or configuration data stored in the 11LC020T-I/MS.

What is the maximum write speed and endurance rating of the 11LC020T-I/MS?

The 11LC020T-I/MS supports page writes of up to 16 bytes per cycle, with a maximum write cycle time of 10 ms. Its endurance is rated at 1,000,000 erase/write cycles per memory location under specified conditions (25°C, VCC = 5.5V). This endurance level is validated per Microchip's Total Endurance™ Model and ensures reliable operation in applications requiring frequent parameter updates, such as adaptive control systems using the 11LC020T-I/MS.

Can the 11LC020T-I/MS operate from a 3.3V supply, and what are its current consumption values?

Yes, the 11LC020T-I/MS is fully specified for 3.3V operation within its 2.5V–5.5V supply range. At VCC = 3.3V and TA = 85°C, its typical active read current is ≤1 mA, write current is ≤3 mA, and standby current is ≤1 µA. These low-current characteristics make the 11LC020T-I/MS suitable for battery-powered or energy-harvesting systems where power budget is constrained.

Is the 11LC020T-I/MS pin-compatible with other devices in the 11XX family, and what package does it use?

Yes, the 11LC020T-I/MS uses the 8-lead MSOP (MS) package with standardized pinout across the 11XX family - pins 1–3 and 6–7 are NC, pin 4 is VSS, pin 5 is VCC, and pin 8 is SCIO. This allows direct PCB footprint reuse for other densities (e.g., 11LC010T-I/MS, 11LC040T-I/MS) without layout changes, provided firmware handles the different memory size and addressing - simplifying BOM consolidation for the 11LC020T-I/MS and related variants.