Microchip Technology 11AA080-I/P

Overview

11AA080-I/P from Microchip Technology Inc. is an 8 Kbit serial EEPROM IC using the UNI/O® single I/O bus interface, organized as 1,024 × 8 bits, operating from 1.8V to 5.5V with 1 µA standby current and 1 mA active current, deployed in low-power embedded systems for nonvolatile parameter storage.

For engineers reviewing the 11AA080-I/P datasheet, 11AA080-I/P pinout, 11AA080-I/P application, or 11AA080-I/P equivalent, key selection criteria include its 1.8V minimum supply, 100 kbps UNI/O® bit rate, page-write buffer (16 bytes), STATUS register control, and block write protection options - all critical for resource-constrained microcontroller peripherals.

Technical Context

The 11AA080-I/P implements Manchester-encoded serial communication over a single SCIO line, extracting clock and data from one bidirectional signal. Its internal architecture includes a page latch, HV generator, and re-synchronization circuitry tolerant to ±0.5% frequency drift per byte and ±0.06 UI input edge jitter.

It uses Schmitt-trigger inputs for noise immunity and slope-controlled output to suppress ground bounce. The STATUS register provides real-time WIP and WEL status, while block protection (BP0/BP1) enables configurable write protection of none, 1/4, 1/2, or full memory array - all managed via WRSR command.

Key Specifications

Pinout & Package

11AA080-I/P is housed in an 8-lead PDIP (Plastic Dual In-line Package) with standard through-hole mounting. Pin 1 is VSS (ground), Pin 4 is NC (no connect), Pin 5 is NC, Pin 8 is VCC (supply voltage), and Pin 3 is SCIO (bidirectional serial clock/data I/O).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C08C-PU and 11LC080-I/P, the 11AA080-I/P uniquely enables single-pin serial communication at 1.8V - reducing system-level pin count and enabling direct integration with modern ultra-low-power MCUs without level-shifting.

Availability

11AA080-I/P is available at Aetrix Electronics and suitable for smart sensor calibration storage, industrial PLC configuration memory, and medical device usage logs requiring stable component supply across extended product lifecycles.

Supply support for 11AA080-I/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 company specializing in microcontrollers, analog devices, and memory products for embedded control applications.

The 11AA080-I/P belongs to Microchip's UNI/O® serial EEPROM family, designed specifically for ultra-low-pin-count, low-voltage embedded systems where minimizing MCU GPIO usage and power consumption is critical.

FAQ

What is the minimum operating voltage for the 11AA080-I/P?

The 11AA080-I/P operates down to 1.8V, enabling direct interface with 1.8V logic families and ultra-low-power microcontrollers. This is a key differentiator from the 11LC080-I/P, which requires a minimum of 2.5V. Operation below 1.8V is not guaranteed and may result in unreliable read/write behavior or STATUS register misreads in the 11AA080-I/P.

How does the UNI/O® interface of the 11AA080-I/P differ from standard I²C or SPI?

The 11AA080-I/P uses Manchester encoding on a single SCIO line to embed clock and data, eliminating separate clock lines required by SPI or I²C. This reduces MCU pin count by two versus I²C and three versus SPI. Unlike I²C, it has no address collision risk on multi-drop buses due to hardwired device addressing, and unlike SPI, it requires no chip-select signals - simplifying firmware and PCB layout for the 11AA080-I/P.

What is the function of the STATUS register in the 11AA080-I/P?

The STATUS register in the 11AA080-I/P provides real-time visibility into device state: the WIP (Write-In-Progress) bit indicates active internal write cycles, the WEL (Write Enable Latch) bit shows whether writes are permitted, and BP0/BP1 bits define block write protection granularity. It is readable at any time - even during writes - and supports continuous polling via MAK repetition, enabling deterministic firmware flow control for the 11AA080-I/P.

Can the 11AA080-I/P be used in automotive applications?

The 11AA080-I/P is rated for Industrial temperature range (−40°C to +85°C), not Automotive (−40°C to +125°C). While it may function in some under-dash environments, Microchip specifies the 11LC080-E/P variant for automotive use. Using the 11AA080-I/P in automotive applications voids qualification compliance and risks thermal-induced data corruption - always verify ambient temperature profiles before selecting the 11AA080-I/P for such deployments.

What package type is used for the 11AA080-I/P part number suffix "-I/P"?

The "-I/P" suffix denotes Industrial temperature grade (−40°C to +85°C) in an 8-lead PDIP (Plastic Dual In-line Package). This through-hole package supports manual prototyping and wave soldering in legacy manufacturing lines. It is distinct from SOIC (SN), MSOP (MS), TDFN (MN), SOT-23 (TT), TO-92 (TO), and Chip Scale (CS) variants - all of which share identical electrical specs but differ mechanically in the 11AA080-I/P family.