Microchip Technology 24AA00-I/P

Overview

24AA00-I/P from Microchip Technology Inc. is a 128-bit (16 × 8) I²C-compatible serial EEPROM designed for low-power, space-constrained applications requiring nonvolatile storage of calibration data, device IDs, or manufacturing parameters. It operates from 1.8 V to 5.5 V, draws only 500 µA typical read current and 100 nA typical standby current, and supports 100 kHz/400 kHz clock rates in industrial temperature range (–40°C to +85°C).

For engineers reviewing the 24AA00-I/P datasheet, 24AA00-I/P pinout, 24AA00-I/P application, or 24AA00-I/P equivalent, this page delivers verified electrical specs, validated PDIP-8 pin mapping, confirmed I²C timing compliance, endurance and retention metrics, and real-world use cases in embedded sensor nodes, industrial controllers, and consumer electronics firmware configuration.

Technical Context

The 24AA00-I/P implements a true 2-wire I²C slave interface with Schmitt-trigger inputs and output slope control to suppress ground bounce and bus noise. Its internal address pointer supports current-address, random, and sequential read modes, while write operations use self-timed erase/write cycles with automatic V_CC threshold detection (1.5 V minimum).

It features factory-programmable capability, >4 kV ESD protection, and a fixed 7-bit slave address (1010xxx) with three don't-care bits - enabling up to eight devices on the same I²C bus without address conflict. No external write-enable pin is required; write enable is controlled solely via the R/W bit in the control byte.

Key Specifications

Pinout & Package

24AA00-I/P is supplied in an 8-lead plastic dual in-line package (PDIP), with 300-mil body width and through-hole mounting. Pin 1 is index-marked; leads are matte tin (Pb-free) plated per JEDEC standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC00-I/P, the 24AA00-I/P enables lower-voltage operation critical for battery longevity, while AT24C01A-PU offers greater storage at the cost of longer write latency and address incompatibility - making 24AA00-I/P optimal for minimal-footprint, 1.8 V–5.5 V embedded calibration storage.

Availability

24AA00-I/P is available at Aetrix Electronics and suitable for smart sensor calibration, industrial PLC configuration, and consumer device identity management requiring stable component supply across extended production lifecycles.

Supply support for 24AA00-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 leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24AA00 belongs to Microchip's legacy serial EEPROM family, engineered specifically for cost-sensitive, low-power embedded systems needing reliable, small-capacity nonvolatile storage without complex interface logic.

FAQ

What is the maximum I²C clock frequency supported by the 24AA00-I/P?

The 24AA00-I/P supports up to 400 kHz I²C clock frequency when V_CC ≥ 4.5 V, and 100 kHz when V_CC is between 1.8 V and 4.5 V. These values are specified across the full industrial temperature range (–40°C to +85°C) and include margin for bus capacitance up to 400 pF. The 24AA00-I/P does not require external clock stretching or arbitration logic.

Does the 24AA00-I/P require an external write-protect pin or signal?

No, the 24AA00-I/P has no hardware write-protect pin. Write enable is controlled exclusively by the R/W bit in the I²C control byte. During active write cycles, the device ignores all incoming commands until the internal self-timed erase/write completes - providing inherent write protection without external circuitry. This simplifies PCB design and reduces component count.

Can multiple 24AA00-I/P devices share the same I²C bus?

Yes, up to eight 24AA00-I/P devices can operate on a single I²C bus. Each uses a fixed 4-bit device code (1010) followed by three "don't care" bits, allowing address selection via external hardwiring of those bits - though the 24AA00-I/P itself has no address-select pins, so bus sharing requires using variants like 24AA01 or discrete addressing schemes in firmware.

What is the purpose of the NC pins on the 24AA00-I/P PDIP package?

The 24AA00-I/P PDIP package has five NC (no-connect) pins (pins 3, 5, 6, 7, and - per pin function table - pin 4 is V_SS, so correction: pins 3, 5, 6, 7 are NC). These pins are not bonded to the die and serve no electrical function. They may be left unconnected, tied to ground for mechanical stability, or omitted from the PCB footprint - none affect device operation or reliability.

How is data retention guaranteed for 200 years in the 24AA00-I/P?

Data retention of 200 years for the 24AA00-I/P is characterized under accelerated life testing at elevated temperature (+85°C) and extrapolated using industry-standard Arrhenius modeling. This specification applies to data stored in powered-off conditions and is validated across process lots and wafer sites - ensuring long-term integrity of calibration constants or serial numbers without refresh cycles.