Microchip Technology 11LC080-E/MS

Overview

11LC080-E/MS 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, featuring 16-byte page write buffer, Schmitt-trigger SCIO input, and built-in write protection for automotive infotainment control storage.

For engineers reviewing the 11LC080-E/MS datasheet, 11LC080-E/MS pinout, 11LC080-E/MS application, or 11LC080-E/MS equivalent, key selection criteria include UNI/O® bus compatibility, automotive temperature grade (-40°C to +125°C), MSOP-8 package footprint, 100 kbps max bit rate, and block-level write protection configuration via STATUS register.

Technical Context

The 11LC080-E/MS implements Manchester-encoded UNI/O® protocol over a single bidirectional SCIO line, using master-controlled timing with slave re-synchronization on MAK edges to tolerate ±0.5% frequency drift per byte and ±0.06 UI input jitter. Internal Address Pointer enables sequential read/write without repeated address transmission.

It integrates a current-limited slope-controlled SCIO driver, Schmitt-trigger input for noise immunity, and nonvolatile STATUS register with WIP, WEL, BP0/BP1 bits. Write cycles are self-timed (max 10 ms), with automatic erase and page-buffered writes up to 16 bytes within a 16-byte physical page boundary.

Key Specifications

Pinout & Package

11LC080-E/MS is housed in an 8-lead MSOP package (MS suffix), with exposed pad option not specified. Pin 1 is SCIO, Pin 2 is VSS, Pin 3 is NC, Pin 4 is NC, Pin 5 is NC, Pin 6 is NC, Pin 7 is NC, Pin 8 is VCC - consistent with MSOP pinout for 11XX family as shown in DS22067J-page 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 11LC080-E/MS, 11AA080-I/MS offers wider voltage flexibility but lacks automotive qualification, while AT24C08D-MAHM-T provides I²C interoperability at the cost of bus protocol redesign and loss of single-pin advantage.

Availability

11LC080-E/MS is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor calibration, and medical device data logging requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 11LC080-E/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 company specializing in microcontrollers, analog devices, and memory solutions, with broad automotive and industrial certifications.

The 11LC080-E/MS belongs to Microchip's 11XX UNI/O® EEPROM family, designed specifically for space- and pin-constrained embedded systems needing reliable, low-power, single-wire nonvolatile storage in harsh environments.

FAQ

What is the UNI/O® interface used by the 11LC080-E/MS, and how does it differ from I²C or SPI?

The 11LC080-E/MS uses Microchip's patented UNI/O® bus - a single-wire, Manchester-encoded serial interface where clock and data share one line (SCIO). Unlike I²C (2-wire, open-drain) or SPI (4-wire, synchronous), UNI/O® eliminates dedicated clock lines and address pins, reducing MCU GPIO usage and PCB routing complexity. It requires no external clock source and supports master-controlled timing with slave re-synchronization, making it ideal for ultra-compact automotive and industrial nodes where pin count and layout area are constrained. The 11LC080-E/MS implements this protocol natively and cannot operate in I²C or SPI mode.

Does the 11LC080-E/MS support write protection, and how is it configured?

Yes, the 11LC080-E/MS supports hardware-based block write protection via two nonvolatile BP0 and BP1 bits in its STATUS register. These bits can be programmed using the WRSR (Write Status Register) command to protect 0%, 25%, 50%, or 100% of the memory array - for example, BP1=0/BP0=1 protects the upper quarter (addresses 0x300–0x3FF). Protection is enforced at the hardware level during WRITE commands and remains active after power cycles. The 11LC080-E/MS also includes built-in power-on write disable and write-enable latch (WEL) control, ensuring writes only occur after explicit WREN instruction.

What is the maximum write speed and page size for the 11LC080-E/MS?

The 11LC080-E/MS supports a maximum serial bus frequency of 100 kHz (100 kbps bit rate), limiting raw command throughput. Its page size is fixed at 16 bytes - meaning up to 16 consecutive bytes can be loaded into the internal write buffer and committed atomically with a single NoMAK termination. Page writes complete in ≤10 ms (TWC), independent of byte count. Attempting to write across a 16-byte boundary causes wraparound within the same page rather than spanning pages, so firmware must align multi-byte writes to page boundaries. This behavior is inherent to the 11LC080-E/MS architecture and documented in DS22067J.

Is the 11LC080-E/MS pin-compatible with other packages in the 11XX family, such as SOIC or PDIP?

No - the 11LC080-E/MS suffix "MS" denotes the 8-lead MSOP package, which has a distinct 3 mm × 3 mm footprint and 0.65 mm lead pitch, incompatible with SOIC (5.3 mm × 6.2 mm, 1.27 mm pitch) or PDIP (6.35 mm × 19.05 mm, 2.54 mm pitch). While all 11XX variants share identical pin functions (SCIO, VSS, VCC, NCs), their physical layouts differ. The 11LC080-E/MS pinout matches only other MSOP-packaged 11XX parts (e.g., 11LC080-E/SN is SOIC; 11LC080-E/P is PDIP). Board redesign is required to substitute package types, though firmware and electrical interface remain identical across the family.

What are the key reliability specifications of the 11LC080-E/MS, and how are they validated?

The 11LC080-E/MS is characterized for 1,000,000 erase/write cycles and >200 years of data retention at 25°C - values confirmed through accelerated life testing per JEDEC standards and published in DS22067J. Endurance is measured per page under typical conditions (25°C, VCC = 5.5V); retention accounts for activation energy modeling across temperature. ESD robustness exceeds 4 kV HBM on all pins. These specs apply specifically to the 11LC080-E/MS device grade and are guaranteed over its full automotive temperature range (-40°C to +125°C), with no derating required. Microchip provides Total Endurance™ modeling tools for application-specific lifetime estimation.