Microchip Technology 24AA00/P

Overview

24AA00/P from Microchip Technology Inc. is a 128-bit (16 × 8) I²C-compatible serial EEPROM optimized for low-voltage, ultra-low-power applications. 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. It is used for storing calibration data, device IDs, or manufacturing traceability in space-constrained industrial control modules.

For engineers reviewing the 24AA00/P datasheet, 24AA00/P pinout, 24AA00/P application, or 24AA00/P equivalent, key selection criteria include its 1.8 V minimum supply, 100 nA standby current, Schmitt-trigger noise immunity, 3 ms typical page write time, and compatibility with standard I²C bus timing and addressing protocols.

Technical Context

The 24AA00/P implements a slave-only I²C interface with fixed 7-bit address prefix '1010' followed by three don't-care bits, enabling up to eight devices on one bus. Its internal address pointer auto-increments during sequential reads and retains position after byte writes.

It uses on-chip charge-pump voltage generation for EEPROM programming, includes VCC threshold detection (1.5 V disable), and relies on external pull-up resistors on SDA/SCL (10 kΩ typical at 100 kHz). All inputs feature Schmitt triggers and input filtering (50 ns spike suppression) for robust operation in electrically noisy environments.

Key Specifications

Pinout & Package

24AA00/P is supplied in an 8-lead PDIP (Plastic Dual In-Line Package) with 300-mil body width, suitable for through-hole prototyping and legacy industrial PCBs. Pin 1 is index-marked; leads are tin-plated, RoHS-compliant, and rated for -40°C to +85°C industrial temperature range.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC00/P and AT24C01A-PU, the 24AA00/P uniquely delivers 1.8 V operation in the smallest possible 128-bit EEPROM footprint, making it optimal for battery-powered or ultra-low-voltage microcontroller peripherals where every nanoamp and millivolt matters.

Availability

24AA00/P is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device ID storage, smart energy meter firmware patching, and automotive body control module trim settings requiring stable component supply across extended product lifecycles.

Supply support for 24AA00/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, serving industrial, automotive, and consumer markets with vertically integrated silicon and development tools.

The 24XX00 family-including 24AA00/P-is designed specifically for minimal-footprint, ultra-low-power nonvolatile storage in resource-constrained embedded systems where cost, voltage headroom, and long-term data integrity are critical.

FAQ

What is the minimum operating voltage for the 24AA00/P?

The 24AA00/P operates down to 1.8 V, verified across the full industrial temperature range (-40°C to +85°C). This enables direct connection to 1.8 V microcontroller I/O banks without level shifters. Below 1.5 V, the internal write logic is disabled by a VCC threshold detector to prevent corrupted EEPROM writes. The 24AA00/P datasheet specifies 1.8 V as the absolute minimum functional supply voltage.

Does the 24AA00/P require external pull-up resistors on SDA and SCL?

Yes, the 24AA00/P requires external pull-up resistors on both SDA and SCL pins because they are open-drain outputs. Typical values are 10 kΩ for 100 kHz operation and 2 kΩ for 400 kHz. These resistors ensure proper bus voltage levels and timing margins. The 24AA00/P itself does not contain internal pull-ups, and omitting external ones will result in communication failure.

How many write cycles can the 24AA00/P endure before failure?

The 24AA00/P is rated for more than 1 million erase/write cycles per memory location, as confirmed by Microchip characterization data. This endurance is guaranteed under recommended operating conditions and supports frequent field updates-such as recalibrating sensor offsets or logging event counters-without premature wear-out. The 24AA00/P specification does not require derating for temperature or voltage within its rated ranges.

Is the 24AA00/P pin-compatible with other devices in the 24XX00 family?

Yes, the 24AA00/P shares identical pinout, package dimensions, and terminal functions with 24LC00/P and 24C00/P in the 8-lead PDIP variant. All three use the same NC/VSS/SDA/SCL/VCC pin mapping. However, differences in minimum supply voltage (1.8 V vs. 2.5 V vs. 4.5 V) and temperature grade mean electrical substitution requires verification of system-level VCC and ambient conditions.

What is the purpose of the NC pins on the 24AA00/P?

Pins 1, 2, 3, and 7 on the 24AA00/P are No-Connect (NC) terminals-physically present but not bonded to the die. They serve mechanical and packaging compatibility roles across the 24XX00 family (e.g., matching SOIC/TSSOP footprints) but carry no electrical function. PCB layouts must leave these pins unconnected; routing or grounding them may cause mechanical stress or unintended coupling without benefit. The 24AA00/P datasheet explicitly defines them as "Not Connected" in the Pin Function Table.