Microchip Technology 24FC08T-I/SN

Overview

24FC08T-I/SN from Microchip Technology Inc. is an 8-Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit blocks, supporting 1 MHz clock operation down to 1.7V supply, with 16-byte page write buffer, hardware write-protect (WP), and industrial temperature range (–40°C to +85°C). It is packaged in an 8-lead SOIC (SN) and used for nonvolatile parameter storage in embedded controllers and sensor modules.

For engineers reviewing the 24FC08T-I/SN datasheet, 24FC08T-I/SN pinout, 24FC08T-I/SN application, or 24FC08T-I/SN equivalent, key selection criteria include V_CC min (1.7V), max clock frequency (1 MHz), page write time (5 ms), endurance (1M cycles), and WP-enabled data integrity in power-constrained systems.

Technical Context

The 24FC08T-I/SN implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes a 16-byte page latch, HV generator for EEPROM programming, and address pointer logic enabling current-address, random, and sequential read modes.

It supports standard (100 kHz), fast (400 kHz), and fast-plus (1 MHz) I²C modes depending on V_CC, with AC timing parameters fully characterized across 1.7V–5.5V and –40°C to +85°C. Write protection is implemented via dedicated WP pin tied to V_CC (enable) or V_SS (disable), independent of I²C commands.

Key Specifications

Pinout & Package

Package: 8-Lead Plastic Small Outline (SOIC), Narrow, 3.90 mm body (JEDEC MS-012, Microchip designation SN).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA08T-I/SN and 24LC08BT-I/SN, the 24FC08T-I/SN uniquely delivers 1 MHz I²C performance at 1.7V, making it the sole option for high-throughput, ultra-low-voltage EEPROM applications without sacrificing industrial temperature rating or hardware write protection.

Availability

24FC08T-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded controller configuration, medical device settings, and IoT edge node identity applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 24FC08T-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 24FC08T-I/SN belongs to Microchip's 24XX08 family of serial EEPROMs, designed specifically for reliable, low-power, I²C-based nonvolatile storage in space-constrained industrial, automotive, and medical systems.

FAQ

What is the minimum operating voltage for the 24FC08T-I/SN?

The 24FC08T-I/SN operates down to 1.7V across its full industrial temperature range (–40°C to +85°C). This allows direct interfacing with 1.8V microcontrollers and battery-backed systems without level-shifting circuitry. At V_CC < 2.5V, the maximum I²C clock frequency is reduced to 100 kHz per datasheet DS20001710M, but the 24FC08T-I/SN maintains full functionality including page write and WP control.

Does the 24FC08T-I/SN support 1 MHz I²C communication?

Yes, the 24FC08T-I/SN supports Fast-Mode Plus I²C at up to 1 MHz when V_CC is between 1.7V and 5.5V. This is a key differentiator from the 24AA08 and 24LC08B variants, which are limited to 400 kHz. The 1 MHz capability reduces write latency for 16-byte page operations to under 100 µs, improving responsiveness in real-time embedded systems.

How does the Write-Protect (WP) pin function on the 24FC08T-I/SN?

The WP pin on the 24FC08T-I/SN is a hardware-level write inhibit: when tied to V_CC, all memory writes (byte and page) are blocked while reads remain fully functional. When tied to V_SS, normal read/write operation is enabled. Unlike software-based protection, this feature is immune to bus glitches, power transients, or firmware errors, providing deterministic data integrity for safety-critical applications.

What is the endurance and data retention specification for the 24FC08T-I/SN?

The 24FC08T-I/SN guarantees 1,000,000 erase/write cycles and greater than 200 years of data retention at 25°C. These specifications are validated per JEDEC standards and apply across the full industrial temperature range. Endurance is measured in page mode; retention assumes storage at rated temperature with no applied V_CC.

Is the 24FC08T-I/SN pin-compatible with other 24XX08 family members in SOIC-8 (SN) package?

Yes, the 24FC08T-I/SN uses identical 8-lead SOIC (SN) packaging and pinout as the 24AA08T-I/SN and 24LC08BT-I/SN, including V_SS, SDA, SCL, WP, and V_CC assignments. A0–A2 pins are no-connect on all three variants. This allows drop-in replacement in existing designs where 1 MHz operation or 1.7V compatibility is added without PCB modification.