Microchip Technology 24AA01T-I/SN16KVAO

Overview

24AA01T-I/SN16KVAO 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 400 kHz clock frequency (100 kHz below 2.5V), delivers ≤1 mA active current and ≤1 µA standby current, and targets nonvolatile data storage in space-constrained embedded control systems.

For engineers reviewing the 24AA01T-I/SN16KVAO datasheet, 24AA01T-I/SN16KVAO pinout, 24AA01T-I/SN16KVAO application, or 24AA01T-I/SN16KVAO equivalent, key selection considerations include industrial temperature range (-40°C to +85°C), SOIC-8 package compatibility, I²C bus noise immunity via Schmitt-trigger inputs, and hardware-based full-array write protection via WP pin.

Technical Context

The 24AA01T-I/SN16KVAO implements a 2-wire I²C interface with fixed 7-bit client address (1010xxx) and R/W bit control, supporting byte and page write modes. Its internal Address Pointer auto-increments during sequential reads and random reads, enabling efficient memory access without external address management.

It integrates Schmitt-trigger inputs on SDA and SCL for noise suppression, output slope control to minimize ground bounce, and an internal HV generator for EEPROM programming. Write cycles are self-timed (max 5 ms), and acknowledge polling is supported to detect completion without fixed delay timing.

Key Specifications

Pinout & Package

24AA01T-I/SN16KVAO is supplied in an 8-lead SOIC (SN) package, 3.90 mm wide, with gull-wing leads and standard JEDEC MS-012AC footprint. Pin 1 is marked by a beveled corner or notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC01B-I/SN, 24AA01T-I/SN16KVAO enables lower-voltage operation and shares identical industrial temp range and SOIC-8 footprint; versus AT24C01D-SSHM-T, it offers hardware WP for fail-safe protection but limits max clock to 400 kHz.

Availability

24AA01T-I/SN16KVAO is available at Aetrix Electronics and suitable for smart meter calibration storage, industrial sensor node configuration, and automotive body control module settings requiring stable component supply across extended product lifecycles.

Supply support for 24AA01T-I/SN16KVAO 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, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24AA01T-I/SN16KVAO belongs to Microchip's 24XX01 family of I²C serial EEPROMs, designed specifically for reliable, low-power, pin-efficient nonvolatile storage in cost-sensitive embedded systems where simplicity and long-term data integrity are critical.

FAQ

What is the maximum I²C clock frequency supported by the 24AA01T-I/SN16KVAO?

The 24AA01T-I/SN16KVAO supports up to 400 kHz when VCC is 2.5V or higher. At supply voltages between 1.7V and 2.49V, the maximum clock frequency is reduced to 100 kHz to maintain timing margin compliance. This dual-speed behavior is explicitly defined in the AC characteristics table of the official Microchip datasheet DS20001711M.

Does the 24AA01T-I/SN16KVAO require external pull-up resistors on SDA and SCL lines?

Yes, the 24AA01T-I/SN16KVAO requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. A typical value is 2 kΩ for 400 kHz operation at 3.3V or 5V; 10 kΩ is recommended for 100 kHz. The exact value depends on bus capacitance and rise-time requirements per I²C specification.

How does the WP pin function on the 24AA01T-I/SN16KVAO?

The WP (Write-Protect) pin on the 24AA01T-I/SN16KVAO provides hardware-level write inhibition: when tied to VCC, all write operations to the full 128-byte memory array (addresses 00h–7Fh) are blocked, while read operations remain fully functional. When tied to VSS or left floating, full read/write access is enabled. This behavior is electrically enforced and independent of firmware state.

Can the 24AA01T-I/SN16KVAO be used in automotive applications?

Yes, the 24AA01T-I/SN16KVAO is AEC-Q100 qualified for automotive applications and operates across the industrial temperature range (-40°C to +85°C). Its hardware write protection, high ESD rating (>4 kV), and robust I²C interface with Schmitt-trigger inputs make it suitable for body control modules, infotainment subsystems, and other automotive ECUs where data integrity and environmental resilience are essential.

What is the page write capability of the 24AA01T-I/SN16KVAO?

The 24AA01T-I/SN16KVAO features an 8-byte page write buffer, allowing up to 8 consecutive bytes to be written in a single I²C transaction. Page writes must stay within the same physical page boundary (addresses 00h–07h, 08h–0Fh, etc.); crossing boundaries causes wraparound. Each page write completes in ≤5 ms, and the device supports ACK polling to detect completion without fixed delays.