Microchip Technology 24FC16-I/SN

Overview

24FC16-I/SN 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 industrial temperature (–40°C to +85°C). It is used in embedded systems for storing calibration data, configuration settings, and firmware parameters.

For engineers reviewing the 24FC16-I/SN datasheet, 24FC16-I/SN pinout, 24FC16-I/SN application, or 24FC16-I/SN equivalent, key selection criteria include its 1 MHz I²C speed, 1.7V low-voltage operation, 16-byte page write buffer, hardware write-protect capability, and SOIC-8 (SN) package compatibility with legacy board layouts.

Technical Context

The 24FC16-I/SN 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 latches, and a high-voltage generator for EEPROM programming.

It supports three read modes-current address, random, and sequential-and uses acknowledge polling to detect write cycle completion. The device requires no external components beyond standard I²C pull-up resistors and accepts slave addresses beginning with '1010' followed by 3 block-select bits and R/W bit.

Key Specifications

Pinout & Package

24FC16-I/SN is supplied in an 8-lead narrow SOIC package (SN), measuring 3.90 mm × 4.90 mm × 1.25 mm (height), with gull-wing leads and JEDEC-standard pinout. 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 24AA16-I/SN, the 24FC16-I/SN delivers twice the I²C throughput for time-critical writes, while AT24C16C-SSHM-T offers comparable speed with alternate qualification pedigree-making 24FC16-I/SN optimal for new designs prioritizing performance within Microchip's ecosystem.

Availability

24FC16-I/SN is available at Aetrix Electronics and suitable for smart energy metering, industrial PLC configuration, and medical device calibration requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 24FC16-I/SN 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 and manufacturing operations.

The 24FC16 belongs to Microchip's 24XX16 family of serial EEPROMs, designed specifically for space-constrained, low-power embedded systems needing robust, pin-compatible nonvolatile storage with enhanced speed and voltage flexibility.

FAQ

What is the maximum I²C clock frequency supported by the 24FC16-I/SN?

The 24FC16-I/SN supports up to 1 MHz I²C clock frequency across its full 1.7V–5.5V supply range, unlike the 24AA16-I/SN (max 400 kHz) or 24LC16B-I/SN (max 400 kHz above 2.5V). This higher speed enables faster page writes and reduced host MCU wait states during configuration updates. The 24FC16-I/SN maintains full timing compliance-including THD:STA (250 ns), TLOW (500 ns), and TR (1000 ns)-at 1 MHz, making it suitable for time-sensitive applications like real-time data logging.

Does the 24FC16-I/SN require external pull-up resistors on SDA and SCL lines?

Yes, the 24FC16-I/SN requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values are 2 kΩ for 1 MHz operation, 10 kΩ for 100 kHz, and 4.7 kΩ for 400 kHz-selected based on bus capacitance and rise-time requirements. The 24FC16-I/SN's Schmitt-trigger inputs tolerate slow edges, but proper pull-ups ensure reliable Start/Stop detection and noise immunity. No internal pull-ups are provided.

How does hardware write-protection work on the 24FC16-I/SN?

Hardware write-protection on the 24FC16-I/SN is controlled by the WP pin: when tied to VCC, the entire memory array (addresses 000h–7FFh) becomes read-only; when tied to VSS, full read/write access is enabled. Unlike software lock bits, this protection remains active during power cycling and prevents accidental writes during brown-out or reset sequences. The 24FC16-I/SN does not support partial-array protection-the WP pin affects all 2048 bytes uniformly.

What is the endurance and data retention specification for the 24FC16-I/SN?

The 24FC16-I/SN guarantees 1,000,000 erase/write cycles per memory location and data retention exceeding 200 years at +25°C ambient. These specifications are validated per JEDEC standards and apply across the full industrial temperature range (–40°C to +85°C). Endurance is measured in page mode; retention assumes storage at rated temperature and voltage. The 24FC16-I/SN's endurance model is documented in Microchip's Total Endurance™ framework, accessible via their website.

Is the 24FC16-I/SN AEC-Q100 qualified and RoHS compliant?

Yes, the 24FC16-I/SN is AEC-Q100 qualified for automotive applications and fully RoHS compliant (Pb-free and halogen-free). Its qualification covers stress testing for temperature cycling, humidity bias, and ESD (>4,000 V HBM), supporting use in body control modules, infotainment systems, and ADAS subsystems. The "I" suffix denotes Industrial temperature grade (–40°C to +85°C), and the "SN" package is approved for automotive reflow profiles. Full qualification reports are available from Microchip upon request.