Microchip Technology 11LC080-E/P

Overview

11LC080-E/P 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 automotive temperature range, featuring 16-byte page write buffer, Schmitt-trigger SCIO input, and built-in write protection for use in automotive body control modules and sensor calibration storage.

For engineers reviewing the 11LC080-E/P datasheet, 11LC080-E/P pinout, 11LC080-E/P application, or 11LC080-E/P equivalent, this device delivers deterministic Manchester-encoded timing at up to 100 kHz, supports self-timed writes with 5 ms typical cycle time, and provides nonvolatile storage with 1 million endurance cycles and >200-year data retention - critical for automotive ECU firmware parameter storage and configuration backup.

Technical Context

The 11LC080-E/P implements a Manchester-encoded UNI/O® protocol over a single bidirectional SCIO line, eliminating clock skew and reducing PCB routing complexity. Its internal architecture includes a current-limited slope-controlled output driver, re-synchronization circuitry tolerant to ±0.5% frequency drift per byte and ±0.06 UI edge jitter, and a STATUS register with WIP and WEL flags for real-time write state monitoring.

It uses a 16-byte page buffer with automatic address rollover within physical pages, requires explicit WREN/WRDI control for write enable/disable, and enforces block write protection via BP0/BP1 bits in the STATUS register - supporting selective protection of 0%, 25%, 50%, or 100% of memory array without external hardware.

Key Specifications

Pinout & Package

11LC080-E/P is housed in an 8-lead PDIP package (P suffix), with lead pitch 0.100", body width 0.300", and RoHS-compliant matte tin plating. Pin 1 is VSS (ground), Pin 4 is NC (no connect), Pin 5 is VCC (supply), Pin 8 is SCIO (bidirectional serial clock/data).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 11LC080-E/P, the 11AA080-I/P trades automotive qualification for wider low-voltage operation, while the AT24C08C-SSHM-T adds pin overhead and external component requirements but offers broader ecosystem support - making 11LC080-E/P optimal for new automotive designs prioritizing pin count reduction and AEC-Q100-aligned reliability.

Availability

11LC080-E/P is available at Aetrix Electronics and suitable for automotive body control modules, engine control units, and transmission control systems requiring stable component supply with guaranteed long-term availability and AEC-Q100-aligned sourcing.

Supply support for 11LC080-E/P 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, with global manufacturing and quality certifications including ISO/TS 16949 for automotive components.

The 11LC080-E/P belongs to Microchip's UNI/O® serial EEPROM family, designed specifically for automotive and industrial applications demanding minimal pin count, high noise immunity, and extended temperature operation without sacrificing endurance or data retention.

FAQ

What is the maximum operating frequency of the 11LC080-E/P UNI/O® bus?

The 11LC080-E/P supports a maximum serial bus frequency of 100 kHz, corresponding to a minimum bit period of 10 µs. This limit is defined by AC timing parameter FBUS in the datasheet and applies across the full -40°C to +125°C temperature range and 2.5V to 5.5V supply voltage. Exceeding this frequency may cause synchronization loss due to insufficient setup/hold margins for Manchester decoding.

Does the 11LC080-E/P require external pull-up resistors on the SCIO line?

No, the 11LC080-E/P does not require external pull-up resistors on the SCIO line. Its internal output driver includes active slope control and current limiting, and the UNI/O® protocol relies on active drive rather than open-drain pull-up operation. External pull-ups may interfere with Manchester encoding timing and are explicitly omitted in Microchip's reference schematics for the 11LC080-E/P.

How is write protection configured on the 11LC080-E/P?

Write protection on the 11LC080-E/P is configured via the STATUS register's BP0 and BP1 bits, which are set using the WRSR (Write Status Register) command. These bits enable protection of 0%, 25%, 50%, or 100% of the memory array. The setting persists after power cycling and is independent of the write-enable latch (WEL), providing hardware-level security against unintended writes even if WREN is asserted.

What is the typical write cycle time for a single byte on the 11LC080-E/P?

The typical write cycle time for a single byte on the 11LC080-E/P is 5 ms at VCC = 5.5V and 25°C, as specified in AC parameter TWC. This includes auto-erase and programming time. The device does not support partial-page writes - even a single-byte write consumes the full 5 ms cycle, though up to 16 bytes can be buffered and written atomically within the same cycle to improve efficiency.

Can the 11LC080-E/P be used in systems powered by 1.8V logic?

No, the 11LC080-E/P is not rated for 1.8V operation. Its specified VCC range is 2.5V to 5.5V, as confirmed in the DEVICE SELECTION TABLE and DC CHARACTERISTICS section. For 1.8V systems, Microchip offers the pin-compatible 11AA080-I/P variant, which supports 1.8–5.5V but is qualified only for Industrial temperature range (-40°C to +85°C), not Automotive E-grade.