Microchip Technology 24AA16T-I/MS

Overview

24AA16T-I/MS from Microchip Technology Inc. is a 16-Kbit I²C-compatible serial EEPROM organized as eight 256 × 8-bit blocks, operating from 1.7V to 5.5V with 400 kHz max clock frequency (100 kHz below 2.5V), 1 μA standby current, and hardware write-protection via the WP pin. It supports page writes up to 16 bytes and is rated for industrial temperature (–40°C to +85°C) in an 8-lead MSOP package.

For engineers reviewing the 24AA16T-I/MS datasheet, 24AA16T-I/MS pinout, 24AA16T-I/MS application, or 24AA16T-I/MS equivalent, key selection criteria include low-voltage operation down to 1.7V, I²C bus compatibility at 100/400 kHz, Schmitt-trigger noise immunity on SDA/SCL, self-timed erase/write cycle, and hardware write-protection functionality.

Technical Context

The 24AA16T-I/MS functions as a slave device on a two-wire I²C bus, using a 7-bit slave address with fixed control code '1010' and three block-select bits (B2–B0) to access one of eight 256-word memory blocks. Its internal Address Pointer auto-increments during sequential reads and page writes.

It implements Schmitt-trigger inputs and output slope control to suppress ground bounce and bus noise; supports ACK polling to detect write-cycle completion; and uses an on-chip 16-byte page buffer to enable efficient multi-byte writes without host intervention between bytes.

Key Specifications

Pinout & Package

8-Lead MSOP (Micro Small Outline Package) with exposed pad; body dimensions 3.0 mm × 3.0 mm × 1.0 mm, pitch 0.65 mm. Pin 1 marked by notch or dot; exposed pad may be connected to VSS or left floating per layout requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC16B-I/MS, the 24AA16T-I/MS enables lower-voltage operation critical for battery-backed systems; compared with 24AA16T-I/SN, it offers 30% smaller PCB area and improved thermal dissipation via the MSOP exposed pad - both alternatives retain identical I²C protocol behavior and endurance.

Availability

24AA16T-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 24AA16T-I/MS 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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24AA16T-I/MS belongs to Microchip's 24XX16 family of I²C serial EEPROMs, designed specifically for space-constrained, low-power embedded systems needing reliable, pin-efficient nonvolatile storage with hardware security features.

FAQ

What is the maximum I²C clock frequency supported by the 24AA16T-I/MS?

The 24AA16T-I/MS supports up to 400 kHz when VCC is ≥2.5V; at 1.7V ≤ VCC < 2.5V, the maximum clock frequency is reduced to 100 kHz to ensure timing margin compliance. This dual-speed capability allows flexible integration across 1.8V, 3.3V, and 5V platforms while maintaining robust bus timing.

How does the WP pin function on the 24AA16T-I/MS?

On the 24AA16T-I/MS, the WP (Write-Protect) pin is a hardware-level control: when tied to VCC, all write operations (including page and byte writes) are inhibited, making the entire 16-Kbit memory read-only; when tied to VSS, full read/write access is enabled. No software command is required to activate protection.

Can the 24AA16T-I/MS be used in a 1.8V system?

Yes - the 24AA16T-I/MS is fully specified for operation from 1.7V to 5.5V, making it compatible with standard 1.8V logic interfaces. At 1.8V, it operates at 100 kHz I²C speed with guaranteed 1 μA standby current and 1 mA read current, enabling ultra-low-power sensor node designs.

What is the page size and write buffer depth of the 24AA16T-I/MS?

The 24AA16T-I/MS has a fixed 16-byte page size and an on-chip 16-byte write buffer. Page writes must remain within a single physical page boundary (addresses aligned to 0x00–0x0F, 0x10–0x1F, etc.); crossing boundaries causes wraparound, not auto-increment to next page.

Is the 24AA16T-I/MS qualified for automotive applications?

The 24AA16T-I/MS itself is rated for industrial temperature (–40°C to +85°C) and is RoHS compliant, but is not AEC-Q100 qualified. For automotive applications requiring AEC-Q100 Grade 2 (–40°C to +105°C) or Grade 3 (–40°C to +125°C), Microchip's 24AA16 variant with 'E' suffix (e.g., 24AA16T-E/MS) should be selected instead.