Microchip Technology 24AA00-I/ST

Overview

24AA00-I/ST from Microchip Technology is a 128-bit (16 × 8) I²C-compatible serial EEPROM designed for low-voltage embedded storage of calibration data, device IDs, and 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). Its 5-lead SOT-23 package enables space-constrained PCB layouts.

For engineers reviewing the 24AA00-I/ST datasheet, 24AA00-I/ST pinout, 24AA00-I/ST application, or 24AA00-I/ST equivalent, key selection considerations include its 1.8 V minimum supply, ultra-low standby current, Schmitt-triggered I²C interface with noise suppression, 3 ms typical page write time, and factory-programmable option for pre-loaded data.

Technical Context

The 24AA00-I/ST implements a slave-only I²C interface with fixed 4-bit device code '1010' and three don't-care address 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 V_CC threshold detection (disables write below 1.5 V), and relies on acknowledge polling-not timeout-to confirm write completion. All I/O pins feature Schmitt-trigger inputs and input filter spike suppression (≤50 ns).

Key Specifications

Pinout & Package

24AA00-I/ST is supplied in a RoHS-compliant 5-lead SOT-23 package (Microchip drawing C04-028D), with 1.90 mm × 1.30 mm footprint and 1.45 mm max height. The exposed pad is not electrically connected and may be left floating or grounded per layout requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC00-I/ST, the 24AA00-I/ST enables true 1.8 V operation and lower standby current; compared with AT24C01C-SSHM-T, it offers smaller footprint, faster write time, and factory-programmable data-but less memory capacity.

Availability

24AA00-I/ST is available at Aetrix Electronics and suitable for smart sensor calibration, IoT edge device identity, and industrial PLC configuration requiring stable component supply across extended product lifecycles.

Supply support for 24AA00-I/ST 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 24XX00 family-including 24AA00-I/ST-is engineered for minimal-footprint, ultra-low-power nonvolatile storage in space- and energy-constrained embedded systems where reliability and long-term data integrity are critical.

FAQ

What is the minimum operating voltage for the 24AA00-I/ST?

The 24AA00-I/ST operates down to 1.8 V across its full industrial temperature range (–40°C to +85°C). This allows direct integration with 1.8 V microcontrollers and low-power sensors without voltage translation. Below 1.5 V, the internal write logic is disabled by the V_CC threshold detector to prevent incomplete or corrupted writes. The 24AA00-I/ST maintains full I²C functionality-including ACK polling and noise-suppressed communication-at 1.8 V.

Does the 24AA00-I/ST support both 100 kHz and 400 kHz I²C clock speeds?

Yes, the 24AA00-I/ST supports 100 kHz standard-mode I²C operation across its entire 1.8–5.5 V supply range. At V_CC ≥4.5 V, it also supports 400 kHz fast-mode timing per Table 1-2 of DS20001178J. The device does not require configuration to switch modes-the clock frequency is determined solely by the master. Pull-up resistors should be sized accordingly: ~10 kΩ for 100 kHz, ~2 kΩ for 400 kHz on typical 100 pF bus capacitance.

How many write cycles can the 24AA00-I/ST endure before failure?

The 24AA00-I/ST is rated for more than 1 million erase/write cycles per memory location, verified through characterization (not 100% tested). This endurance applies across the full industrial temperature range and supply voltage window. Field reliability modeling (Microchip's Total Endurance™ Model) confirms that typical usage patterns-such as writing once per hour-project >30 years of functional life before wear-out. The 24AA00-I/ST does not implement wear leveling; each address wears independently.

Is factory programming available for the 24AA00-I/ST?

Yes, factory programming is an optional service for the 24AA00-I/ST. Microchip can pre-load up to 128 bits of customer-defined data-such as serial numbers, calibration coefficients, or cryptographic keys-during final test. This eliminates post-solder programming steps, reduces production line complexity, and enhances security by avoiding field-accessible programming interfaces. Programmed units ship with data permanently stored and ready for immediate system use.

What package type is used for the 24AA00-I/ST?

The 24AA00-I/ST is packaged in a 5-lead SOT-23 (Microchip drawing C04-028D), measuring 1.90 mm × 1.30 mm with 1.45 mm maximum height. Pin 1 is SCL, pin 2 is V_SS, pin 3 is SDA, pin 4 is NC, and pin 5 is V_CC. The package is Pb-free and RoHS compliant. No thermal pad connection is required-the exposed metal area is non-functional and may be left floating or grounded per PCB thermal design needs.