Microchip Technology 24AA01T-I/OT16KVAO

Overview

24AA01T-I/OT16KVAO from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory with hardware write-protection, 8-byte page buffer, and operation down to 1.7V. It supports up to 400 kHz clock frequency (100 kHz at V_CC < 2.5V), delivers ≤1 µA standby current, and targets low-power embedded configuration storage in industrial sensors and IoT edge nodes.

For engineers reviewing the 24AA01T-I/OT16KVAO datasheet, 24AA01T-I/OT16KVAO pinout, 24AA01T-I/OT16KVAO application, or 24AA01T-I/OT16KVAO equivalent, key selection criteria include its I²C timing compliance at 1.7V–5.5V, WP-enabled full-array write protection, Schmitt-trigger noise immunity on SDA/SCL, and guaranteed >1 million erase/write cycles with >200-year data retention.

Technical Context

The 24AA01T-I/OT16KVAO implements a standard two-wire I²C interface with fixed 7-bit device address (1010xxx) and R/W bit control. Its internal architecture includes an 8-byte page latch, HV generator for EEPROM programming, and address pointer auto-increment logic supporting sequential reads and random access.

It uses open-drain SDA/SCL with external pull-up resistors, requires no external components for basic operation, and relies on acknowledge polling to detect write cycle completion. The WP pin provides hardware-level write inhibition when tied to V_CC, independent of software commands.

Key Specifications

Pinout & Package

24AA01T-I/OT16KVAO is supplied in an 5-lead SC-70 package (JEDEC MO-203AA, Microchip drawing C04-061-LT). Dimensions: 2.00 mm × 1.25 mm × 0.95 mm (L × W × H), 0.65 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC01B-I/OT, the 24AA01T-I/OT16KVAO enables lower-voltage operation critical for energy-harvesting nodes, while 24FC01T-I/OT offers faster communication but demands stricter signal integrity controls - making the 24AA01T-I/OT16KVAO optimal for cost-sensitive, ultra-low-power industrial deployments.

Availability

24AA01T-I/OT16KVAO is available at Aetrix Electronics and suitable for industrial sensor calibration storage, IoT edge node configuration, medical device parameter backup, and automotive body control module settings requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 24AA01T-I/OT16KVAO 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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design, manufacturing, and sales operations.

The 24AA01T-I/OT16KVAO belongs to Microchip's 24XX01 family of I²C serial EEPROMs, designed specifically for space-constrained, low-power embedded systems needing reliable, long-life nonvolatile storage without complex initialization or external support circuitry.

FAQ

What is the minimum V_CC required for reliable operation of the 24AA01T-I/OT16KVAO?

The 24AA01T-I/OT16KVAO operates reliably down to 1.7V across its full industrial temperature range (−40°C to +85°C). Below 2.5V, its maximum I²C clock frequency is reduced to 100 kHz to maintain timing margins. This low-voltage capability allows direct integration with 1.8V microcontrollers and energy-harvesting power supplies without level-shifting circuitry - a key advantage over alternatives like the 24LC01B.

How does the WP pin function on the 24AA01T-I/OT16KVAO?

The WP (Write-Protect) pin on the 24AA01T-I/OT16KVAO provides hardware-level inhibition of all write operations when tied to V_CC. When grounded (V_SS), full read/write access is enabled. Unlike software-based protection, this mechanism is immune to firmware errors or bus corruption - ensuring critical calibration data or security keys remain unaltered even during unexpected MCU resets or I²C glitches.

Can the 24AA01T-I/OT16KVAO be used in automotive applications?

Yes - the 24AA01T-I/OT16KVAO is AEC-Q100 qualified (Grade 2, −40°C to +105°C ambient) and RoHS compliant. Its 1.7V–5.5V operation supports automotive cold-crank conditions, and its >1 million endurance cycles accommodate frequent parameter updates in body control modules. Microchip's official qualification documentation confirms its suitability for automotive infotainment, lighting, and comfort systems.

What is the purpose of the A0, A1, and A2 pins on the 24AA01T-I/OT16KVAO?

The A0, A1, and A2 pins on the 24AA01T-I/OT16KVAO are not internally connected and serve no functional role. They may be left floating or tied to V_SS/V_CC without affecting operation. This design simplifies PCB layout and eliminates address conflicts in multi-device I²C systems - unlike larger EEPROMs where these pins configure device addressing, the 24AA01T-I/OT16KVAO uses a fixed 7-bit address (1010xxx) with "don't care" bits.

How many bytes can be written in a single page write operation for the 24AA01T-I/OT16KVAO?

The 24AA01T-I/OT16KVAO supports an 8-byte page write buffer. Up to eight consecutive bytes can be loaded into the buffer and committed to memory with a single Stop condition. Attempting to write more than eight bytes before issuing Stop causes address pointer rollover and overwrite within the same physical page - requiring application firmware to enforce page boundary alignment to prevent unintended data loss.