Microchip Technology 11LC010T-I/MS

Overview

11LC010T-I/MS from Microchip Technology 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 systems requiring nonvolatile parameter storage.

For engineers reviewing the 11LC010T-I/MS datasheet, 11LC010T-I/MS pinout, 11LC010T-I/MS application, or 11LC010T-I/MS equivalent, key selection criteria include its 3-lead MSOP package, I²C-free single-pin serial interface, industrial temperature rating, 100 kbps bit rate, and block-level write protection - all critical for low-pin-count microcontroller peripherals and legacy bus upgrades.

Technical Context

The 11LC010T-I/MS implements a Manchester-encoded, master-controlled UNI/O® bus protocol on a single SCIO pin, eliminating clock line requirements while maintaining timing synchronization via start-header-based re-synchronization. Its internal architecture includes a 16-byte page latch, STATUS register with WIP/WEL/BP bits, and current-limited slope-controlled output driver.

It supports byte and page writes with self-timed erase/write cycles (max 10 ms), Schmitt-triggered SCIO input for noise immunity, and built-in power-on/off data protection. The device uses a hardwired 0xA0 device address and supports up to four block protection configurations (none, 1/4, 1/2, or full array).

Key Specifications

Pinout & Package

11LC010T-I/MS is packaged in an 8-lead MSOP (MS) with exposed pad, measuring 3.0 mm × 3.0 mm × 1.0 mm. Pin 1 is SCIO (serial clock/data I/O), Pin 2 is VSS (ground), Pin 3 is VCC (supply voltage), and Pins 4–8 are no-connect (NC) terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 11AA010T-I/MS, the 11LC010T-I/MS trades 1.8V operation for guaranteed 2.5V+ stability, while versus 24AA01-I/MS it eliminates I²C overhead and pin count but sacrifices bus multi-drop flexibility - making it optimal for cost-sensitive, pin-constrained single-slave systems.

Availability

11LC010T-I/MS is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, medical diagnostics, and smart sensor designs requiring stable component supply with long-term manufacturability and consistent parametric performance.

Supply support for 11LC010T-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 leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 11LC010T-I/MS belongs to Microchip's UNI/O® serial EEPROM family, designed specifically for ultra-low-pin-count embedded systems where minimizing MCU I/O usage and board space is critical - especially in cost-sensitive, high-volume consumer and industrial applications.

FAQ

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

The 11LC010T-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, open-drain) or SPI (4-wire, synchronous), UNI/O® eliminates dedicated clock lines and slave-select signals, reducing MCU pin count and PCB routing complexity. It requires no external clock source and handles synchronization autonomously via start-header detection, making it ideal for deeply embedded applications with minimal GPIO resources.

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

Yes, the 11LC010T-I/MS supports hardware-based block write protection controlled by two nonvolatile BP0 and BP1 bits in its STATUS register. These bits are set via the WRSR (Write Status Register) command and configure protection for none, 1/4, 1/2, or the entire 128-byte memory array. Protection is enforced at the silicon level - even during power cycling - and cannot be overridden without first clearing the bits via WRSR with proper write enable sequence (WREN → WRSR).

What is the maximum write speed and timing behavior of the 11LC010T-I/MS during a page write?

The 11LC010T-I/MS supports up to 16-byte page writes with a maximum bit rate of 100 kbps, yielding ~1.3 ms minimum transmission time for a full page. After the final NoMAK, the internal self-timed write cycle begins and completes in ≤10 ms. During this time, the WIP bit in the STATUS register reads '1'; polling RDSR allows the host MCU to determine completion without fixed delays. No external timing constraints apply beyond the 10 ms worst-case Twc specification.

Can the 11LC010T-I/MS operate reliably at 2.5V, and what are its current consumption characteristics at that voltage?

Yes, the 11LC010T-I/MS is fully specified for operation at 2.5V across its industrial temperature range (–40°C to +85°C). At 2.5V, its typical active current (ICC Read) is 1 mA, and standby current (Iccs) is ≤1 µA at +85°C. These values meet low-power design requirements for battery-backed or energy-harvesting systems, and the device maintains full functionality - including 100 kbps bit rate and full write endurance - at the minimum VCC.

Is the 11LC010T-I/MS pin-compatible with other devices in the 11XX family, such as the 11LC020T-I/MS or 11LC040T-I/MS?

No - while the 11LC010T-I/MS shares the same 8-lead MSOP (MS) package and pinout (SCIO/VSS/VCC/NC×5) with higher-density variants like 11LC020T-I/MS and 11LC040T-I/MS, they are not functionally interchangeable without firmware changes. All 11XX devices use identical UNI/O® protocol and command set, but memory size, page boundaries, and address space differ. A 11LC010T-I/MS replacement with 11LC040T-I/MS would require host software to handle 512-byte addressing and avoid crossing 16-byte physical page boundaries.