Microchip Technology 11LC080T-I/TT

Overview

11LC080T-I/TT from Microchip Technology Inc. is an 8 Kbit (1,024 × 8) serial EEPROM using the UNI/O® single I/O bus interface. It operates from 2.5V to 5.5V, draws only 1 mA active current and 1 µA standby current (max., I-temp), and supports 100 kbps bit rate with Manchester-encoded SCIO communication. It is used for nonvolatile parameter storage in space-constrained industrial control modules.

For engineers reviewing the 11LC080T-I/TT datasheet, 11LC080T-I/TT pinout, 11LC080T-I/TT application, or 11LC080T-I/TT equivalent, key selection criteria include its 3-lead SOT-23 package, industrial temperature range (−40°C to +85°C), page-write buffer (16 bytes), STATUS register with WIP/WEL bits, and block write protection options (none/1/4/1/2/all).

Technical Context

The 11LC080T-I/TT implements a Manchester-encoded, master-controlled UNI/O® bus with a single bidirectional SCIO line. Its internal architecture includes a 16-byte page latch, STATUS register with Write-In-Progress and Write-Enable Latch flags, and hardware-based block protection controlled by BP0/BP1 bits.

It features Schmitt-trigger SCIO input for noise immunity, output slope control to suppress ground bounce, and re-synchronization circuitry tolerant of ±0.50% frequency drift per byte and ±0.06 UI edge jitter. Standby mode is entered after NoMAK/SAK termination or explicit standby pulse (≥600 µs high on SCIO).

Key Specifications

Pinout & Package

11LC080T-I/TT is housed in a 3-lead SOT-23 package (TT suffix), with leads arranged as SCIO–V_CC–V_SS (top-down view, lead 1 = SCIO).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 11AA080T-I/TT, the 11LC080T-I/TT trades 1.8V support for broader 2.5–5.5V compatibility and potentially tighter parametric consistency across voltage; versus AT24C08D-SSHM-T, it delivers pin and protocol savings at the cost of interface ecosystem lock-in.

Availability

11LC080T-I/TT is available at Aetrix Electronics and suitable for industrial sensor nodes, medical handheld devices, automotive body electronics, and smart metering systems requiring stable component supply across extended production lifecycles.

Supply support for 11LC080T-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 products for embedded control applications.

The 11LC080T-I/TT belongs to Microchip's UNI/O® serial EEPROM family, designed specifically for ultra-low-pin-count systems where minimizing I/O usage and PCB area is critical - especially in cost-sensitive, space-constrained industrial and consumer electronics.

FAQ

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

The 11LC080T-I/TT uses Microchip's patented UNI/O® bus - a single-wire, Manchester-encoded serial interface that combines clock and data on the SCIO line. Unlike I²C (2-wire, open-drain) or SPI (4-wire, separate clock/data), UNI/O® requires only one I/O pin plus power/ground, eliminating pull-ups and simplifying routing. The 11LC080T-I/TT decodes timing directly from edge transitions, enabling robust communication in electrically noisy environments without external clock lines.

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

Yes, the 11LC080T-I/TT supports hardware block write protection via two nonvolatile BP0/BP1 bits in its STATUS register. These bits are set using the WRSR command and allow protection of none, 1/4, 1/2, or the entire memory array. Protection is enforced at the hardware level - writes to protected blocks are ignored even if the write enable latch is set. This feature is critical for safeguarding calibration data or firmware configuration in the 11LC080T-I/TT.

What is the maximum write speed and endurance specification for the 11LC080T-I/TT?

The 11LC080T-I/TT supports a maximum bus frequency of 100 kHz (100 kbps), with typical byte/page write cycle times of 5–10 ms. Its endurance is rated at 1,000,000 erase/write cycles per memory location under specified conditions (25°C, V_CC = 5.5V), and data retention exceeds 200 years at 85°C. These specifications are guaranteed across the full industrial temperature range and apply directly to the 11LC080T-I/TT in its SOT-23 package.

Can the 11LC080T-I/TT be used with a 1.8V microcontroller?

No - the 11LC080T-I/TT requires a minimum V_CC of 2.5V and is not rated for 1.8V operation. For 1.8V systems, Microchip offers the functionally identical 11AA080T-I/TT, which shares the same 3-lead SOT-23 package and UNI/O® interface but supports 1.8–5.5V. Using the 11LC080T-I/TT with a 1.8V MCU would violate its absolute maximum ratings and risk unreliable communication or damage.

How does the STATUS register in the 11LC080T-I/TT assist in firmware development?

The STATUS register in the 11LC080T-I/TT provides real-time visibility into two critical states: the Write-In-Progress (WIP) bit indicates whether an internal write cycle is active, and the Write-Enable Latch (WEL) bit confirms if writes are permitted. Firmware can poll these bits via RDSR without halting other operations - enabling efficient, non-blocking write routines and safe error recovery. This capability is built into the 11LC080T-I/TT's silicon and requires no additional hardware.