Microchip Technology 24FC16T-E/OT

Overview

24FC16T-E/OT from Microchip Technology Inc. is a 16-Kbit I²C-compatible serial EEPROM organized as eight 256 × 8-bit blocks, supporting 1 MHz clock frequency at 1.7V–5.5V supply, with hardware write-protection, 16-byte page write buffer, and extended temperature operation from –40°C to +125°C. It enables nonvolatile data storage in space-constrained industrial sensor nodes and automotive body control modules.

For engineers reviewing the 24FC16T-E/OT datasheet, 24FC16T-E/OT pinout, 24FC16T-E/OT application, or 24FC16T-E/OT equivalent, key selection criteria include its 1 MHz I²C speed at low voltage, E-temp qualification, SOIC-8 (OT) package compatibility, and WP-enabled hardware write protection - critical for firmware parameter retention in harsh environments.

Technical Context

The 24FC16T-E/OT operates as an I²C slave device with fixed 4-bit control code '1010' and 3-bit block-select addressing, enabling access to eight 256-word memory blocks. Its internal Address Pointer supports current-address, random, and sequential read modes, while Schmitt-trigger inputs and output slope control suppress bus noise and ground bounce.

Write operations include byte-write and 16-byte page-write with self-timed erase/write cycles (≤5 ms), and acknowledge polling allows host synchronization without fixed delays. The WP pin provides hardware-level write inhibition when tied to VCC, protecting the full 000h–7FFh address range.

Key Specifications

Pinout & Package

24FC16T-E/OT is supplied in an 8-lead SOIC package (JEDEC MS-012, package code OT), with 3.90 mm body width, gull-wing leads, and standard 1.27 mm pitch. The exposed pad is not present in this variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24FC16T-E/OT, the 24AA16T-E/OT trades 2.5× lower I²C bandwidth for broader legacy compatibility, while the AT24C16D-SSHM-T matches speed but sacrifices extended temperature capability and automotive qualification - making 24FC16T-E/OT the sole choice for high-speed, high-reliability E-temp deployments.

Availability

24FC16T-E/OT is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor calibration systems, and smart energy meter firmware storage requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 24FC16T-E/OT 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 24FC16T-E/OT belongs to Microchip's 24XX16 family of serial EEPROMs, engineered specifically for robust, low-voltage, high-speed nonvolatile storage in automotive, industrial, and medical applications demanding extended temperature operation and AEC-Q100 compliance.

FAQ

What is the maximum I²C clock frequency supported by the 24FC16T-E/OT?

The 24FC16T-E/OT supports up to 1 MHz I²C clock frequency across its full 1.7V–5.5V supply range. This is confirmed in the Device Selection Table and AC Characteristics section of DS20001703M, distinguishing it from the 24AA16 (400 kHz) and 24LC16B (400 kHz, min 2.5V). No derating is required below 2.5V, unlike older variants.

Does the 24FC16T-E/OT require external pull-up resistors on SDA and SCL lines?

Yes, the 24FC16T-E/OT requires external pull-up resistors on both SDA and SCL lines because it uses open-drain outputs. For 1 MHz operation, a 2 kΩ pull-up to VCC is recommended per the datasheet's AC characteristics table and functional description - ensuring rise times ≤1000 ns under worst-case bus capacitance.

How does hardware write-protection work on the 24FC16T-E/OT?

Hardware write-protection on the 24FC16T-E/OT is controlled by the WP pin: when tied to VCC, all write operations (byte and page) to the full 000h–7FFh memory range are inhibited; reads remain fully functional. When WP is tied to VSS, normal read/write access is enabled. This behavior is electrically enforced and does not depend on internal registers or software commands.

Is the 24FC16T-E/OT AEC-Q100 qualified?

Yes, the 24FC16T-E/OT is explicitly listed as Automotive AEC-Q100 Qualified in the Features section of DS20001703M. Its Extended temperature rating (–40°C to +125°C) and qualification testing meet AEC-Q100 Rev G stress test requirements for automotive electronic components.

What package type does the suffix 'OT' indicate for the 24FC16T-E/OT?

The 'OT' suffix in 24FC16T-E/OT denotes the 8-lead SOIC (Small Outline Integrated Circuit) package per JEDEC MS-012, with 3.90 mm body width and 1.27 mm lead pitch. This is confirmed in the Package Types table and Package Marking Information section of DS20001703M, where 'OT' is listed under Available Packages for 24FC16.