Microchip Technology 24FC16-E/P

Overview

24FC16-E/P from Microchip Technology Inc. is a 16-Kbit I²C-compatible serial EEPROM organized as eight 256 × 8-bit memory blocks. It operates from 1.7V to 5.5V, supports up to 1 MHz clock frequency, features hardware write-protection via the WP pin, and delivers ≤1 μA standby current at extended temperature (–40°C to +125°C). It is used in industrial sensor calibration storage and embedded system configuration retention.

For engineers reviewing the 24FC16-E/P datasheet, 24FC16-E/P pinout, 24FC16-E/P application, or 24FC16-E/P equivalent, this page provides verified electrical parameters, package-specific pin mapping for the 8-lead PDIP variant, real-world use scenarios, and two validated alternative parts with documented functional and application-level differences.

Technical Context

The 24FC16-E/P implements a two-wire I²C slave interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes an 8-bit address pointer, 16-byte page write buffer, and self-timed erase/write cycle with no external timing components required.

It uses a fixed 4-bit control code (1010) plus 3-bit block-select bits (B2–B0) for device addressing, supporting only one 24FC16 per I²C bus. Write protection is implemented via a dedicated WP input that disables all write operations when pulled high.

Key Specifications

Pinout & Package

Package: 8-Lead Plastic Dual In-Line Package (PDIP), 300 mil body width, through-hole mounting. Pin 1 is located at the left end of the top row when viewed from top with notch or dot oriented upward.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA16-I/P and AT24C16C-PU, the 24FC16-E/P uniquely combines 1 MHz speed, extended temperature rating, and AEC-Q100 qualification-making it the only drop-in option for automotive and high-reliability industrial designs requiring fast, robust nonvolatile storage.

Availability

24FC16-E/P is available at Aetrix Electronics and suitable for industrial sensor calibration storage, automotive body control modules, medical device configuration backup, and smart energy meter firmware parameters requiring stable component supply across long production lifecycles.

Supply support for 24FC16-E/P 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory products with global manufacturing and quality certifications.

The 24FC16 belongs to Microchip's 24XX16 family of serial EEPROMs designed specifically for reliable, low-power, I²C-based configuration and calibration data storage in harsh environmental conditions.

FAQ

What is the maximum I²C clock frequency supported by the 24FC16-E/P?

The 24FC16-E/P supports up to 1 MHz I²C clock frequency across its full 1.7V–5.5V supply range. This is higher than the 400 kHz limit of the 24AA16 and 24LC16B variants, enabling faster configuration reads and writes in time-sensitive applications. The 24FC16-E/P maintains this speed even at minimum VCC (1.7V), unlike the 24AA16 which drops to 100 kHz below 2.5V.

How does the WP pin function on the 24FC16-E/P?

The WP (Write-Protect) pin on the 24FC16-E/P is a dedicated hardware enable/disable input. When tied to VCC, it inhibits all write operations-including byte and page writes-while allowing unrestricted read access. When tied to VSS (or left floating, though not recommended), full read/write functionality is enabled. This feature is implemented entirely in hardware and requires no software intervention, making it ideal for safeguarding critical calibration data in the 24FC16-E/P.

Is the 24FC16-E/P compatible with standard I²C protocol implementations?

Yes, the 24FC16-E/P is fully compliant with the standard I²C bus specification. It uses the standard 7-bit slave address format with a fixed 4-bit control code (1010) followed by 3 block-select bits and a R/W bit. It supports Start/Stop conditions, ACK/NACK handshaking, and repeated Start sequences. The 24FC16-E/P also incorporates Schmitt-trigger inputs and slew-rate controlled outputs to ensure robust interoperability with diverse I²C masters.

What is the endurance rating of the 24FC16-E/P and how is it validated?

The 24FC16-E/P is rated for more than 1 million erase/write cycles per memory location, validated at 25°C and 5.5V using page-mode programming. This endurance is ensured through characterization-not 100% tested-but backed by Microchip's Total Endurance™ Model for application-specific lifetime estimation. Data retention exceeds 200 years under normal operating conditions, making the 24FC16-E/P suitable for long-lifecycle industrial and automotive deployments.

Does the 24FC16-E/P require external pull-up resistors on the I²C bus lines?

Yes, the 24FC16-E/P requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. For 1 MHz operation, a 2 kΩ pull-up to VCC is recommended; for 400 kHz, 2.2 kΩ is typical; and for 100 kHz, 10 kΩ is sufficient. These values assume standard bus capacitance (≤400 pF); higher capacitance requires lower resistance to maintain rise-time compliance per I²C specification. The 24FC16-E/P itself does not integrate pull-ups.