Microchip Technology 11AA010-I/P

Overview

11AA010-I/P from Microchip Technology Inc. is a 1 Kbit (128 × 8) serial EEPROM with UNI/O® single I/O bus interface, operating from 1.8V to 5.5V, featuring 16-byte page write buffer, 1 µA max standby current (I-temp), and Schmitt-trigger SCIO input for noise immunity. It is used in space-constrained embedded systems requiring nonvolatile parameter storage with minimal pin count.

For engineers reviewing the 11AA010-I/P datasheet, 11AA010-I/P pinout, 11AA010-I/P application, or 11AA010-I/P equivalent, this device delivers low-voltage operation down to 1.8V, Manchester-encoded timing resilience, built-in block write protection, and compatibility with microcontroller GPIOs lacking dedicated SPI/I²C peripherals.

Technical Context

The 11AA010-I/P implements a Manchester-encoded, master-controlled UNI/O® bus protocol over a single bidirectional SCIO line, eliminating clock skew and enabling synchronization via start-header edge detection. 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-write operations with self-timed erase/write cycles (max 10 ms), automatic write-enable latch management, and re-synchronization logic tolerant to ±0.5% frequency drift per byte and ±0.06 UI edge jitter. Block protection configures 0%, 25%, 50%, or 100% of memory array via BP0/BP1 bits.

Key Specifications

Pinout & Package

11AA010-I/P is housed in an 8-lead PDIP (Plastic Dual In-line Package) with 0.300-inch body width, compatible with through-hole prototyping and legacy automated insertion equipment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 11LC010-I/P, the 11AA010-I/P enables lower-system-voltage operation and simpler GPIO-based firmware implementation; compared with AT24C01C-PU, it reduces pin count and eliminates bus contention risks but requires UNI/O® protocol stack integration.

Availability

11AA010-I/P is available at Aetrix Electronics and suitable for smart sensor calibration, industrial control configuration, and consumer appliance settings requiring stable component supply across multi-year production cycles.

Supply support for 11AA010-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 manufacturer specializing in microcontrollers, analog devices, and memory products for embedded control applications.

The 11AA010-I/P belongs to Microchip's UNI/O® Serial EEPROM family, designed specifically for space- and pin-constrained systems needing reliable, low-voltage nonvolatile storage with minimal MCU resource usage.

FAQ

What is the minimum VCC voltage supported by the 11AA010-I/P?

The 11AA010-I/P operates down to 1.8V across its full industrial temperature range (–40°C to +85°C). Below 2.5V, the input threshold shifts to 0.2×VCC for VIL and 0.3×VCC for VIH, ensuring robust logic recognition even at lowest supply. This enables direct use with 1.8V MCUs without level translation.

How does the 11AA010-I/P handle bus conflicts on the SCIO line?

The 11AA010-I/P incorporates a current-limited output driver on the SCIO pin, with ±3 mA (at 2.5V) and ±4 mA (at 5.5V) limits. This prevents excessive current draw during simultaneous drive conditions, protecting both the EEPROM and host MCU. The driver impedance dynamically adjusts to maintain compliance without external current-limiting resistors.

Can the 11AA010-I/P be used in place of an I²C EEPROM like the AT24C01?

No - the 11AA010-I/P uses the proprietary UNI/O® single-wire protocol with Manchester encoding, not I²C. It requires different firmware (bit-banged UNI/O® stack) and hardware (single pull-up on SCIO). Direct replacement is not possible without modifying host communication code and PCB routing.

What is the purpose of the NC pins on the 11AA010-I/P PDIP package?

The six NC pins (1, 2, 3, 6, 7, and pin 4 is VSS) on the 11AA010-I/P PDIP package are unconnected die pads. They serve mechanical anchoring and thermal dissipation roles but carry no electrical signal. Layout best practice is to tie them to VSS for improved noise immunity and heat transfer, though floating is acceptable per Microchip's design notes.

How does the 11AA010-I/P indicate write completion during a page write?

The 11AA010-I/P asserts the Write-In-Progress (WIP) bit in its STATUS register during internal write cycles. Host firmware reads the STATUS register (RDSR command) and polls the WIP bit until it clears to '0'. This method avoids fixed delays and adapts to actual write time, which varies with VCC and temperature - critical for deterministic real-time systems.