Microchip Technology 24FC08-E/SN

Overview

24FC08-E/SN from Microchip Technology is an 8-Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit blocks, operating from 1.7V to 5.5V with 1 MHz maximum clock frequency, 5 ms max page write time, and rated for -40°C to +125°C extended temperature range in 8-lead SOIC (SN) package. It supports hardware write-protection via the WP pin and delivers 1 µA standby current at I-temp and 3 µA at E-temp.

For engineers reviewing the 24FC08-E/SN datasheet, 24FC08-E/SN pinout, 24FC08-E/SN application, or 24FC08-E/SN equivalent, this page provides verified electrical specs, SOIC-8 pin mapping, I²C timing compliance at 1 MHz, endurance (1M cycles), and data retention (>200 years) - all confirmed for the exact 24FC08-E/SN variant per DS20001710M.

Technical Context

The 24FC08-E/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 write buffer, self-timed erase/write cycle, and address pointer logic supporting current-address, random, and sequential read modes.

It uses a fixed 4-bit control code (1010) with 2-bit block select (B1/B0) and R/W bit for device addressing across its 1024-byte memory space (000–3FF hex). Write protection is enabled by tying WP to VCC; the SN package fully supports this function.

Key Specifications

Pinout & Package

8-Lead SOIC (SN) package: 3.90 mm body width, 1.27 mm pitch, gull-wing leads, RoHS-compliant matte tin finish. Pin 1 marked by notch or bevel; exposed pad not present in SN variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA08-I/SN, the 24FC08-E/SN delivers 2.5× faster I²C throughput and extended temperature capability; versus AT24C08D-SSHM-T, it offers simpler, hardware-enforced write protection critical for safety-critical updates.

Availability

24FC08-E/SN is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC configuration storage, and medical infusion pump parameter retention requiring stable component supply across long product lifecycles.

Supply support for 24FC08-E/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 microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.

The 24FC08 is part of Microchip's high-reliability serial EEPROM family designed specifically for automotive, industrial, and medical applications demanding extended temperature operation, high endurance, and AEC-Q100 qualification.

FAQ

What is the maximum I²C clock frequency supported by the 24FC08-E/SN?

The 24FC08-E/SN supports up to 1 MHz I²C clock frequency across its full 1.7V–5.5V supply range, as specified in Table 1-1 AC Characteristics of DS20001710M. This is higher than the 400 kHz limit of the 24AA08 and 24LC08B variants, enabling faster firmware updates and parameter writes in time-constrained systems.

Does the 24FC08-E/SN support hardware write protection, and how is it implemented?

Yes, the 24FC08-E/SN implements hardware write protection via the WP pin (Pin 7). When tied to VCC, the entire 1024-byte memory array is locked against write operations while reads remain fully functional. This feature is fully supported in the SOIC-8 (SN) package and requires no firmware configuration - making it ideal for fail-safe parameter lockdown in safety-critical designs.

What is the endurance and data retention specification for the 24FC08-E/SN?

The 24FC08-E/SN is rated for 1,000,000 erase/write cycles and greater than 200 years of data retention at 25°C, as confirmed in Section 1.0 Electrical Characteristics (Table 1-1, Parameter 18) of DS20001710M. These values are validated under worst-case conditions including extended temperature operation and full-page write stress testing.

Which packages are available for the 24FC08-E/SN, and what does the "-E/SN" suffix indicate?

The "-E/SN" suffix denotes the Extended temperature grade (-40°C to +125°C) in the 8-lead narrow SOIC package (JEDEC MS-012, Microchip drawing C04-057-SN). Per the Device Selection Table, 24FC08 is offered in MSOP, PDIP, SOIC (SN), TSSOP, and CSP packages - but only SN, MS, P, ST, and Q4B are listed for the E-temp variant. The SN package is leaded, RoHS-compliant, and widely supported in automated assembly.

How does the 24FC08-E/SN handle page boundaries during write operations?

The 24FC08-E/SN uses a 16-byte page buffer, and page write operations are restricted to addresses within a single physical page (0–15, 16–31, etc.). If a write crosses a 16-byte boundary, data wraps to the start of the same page instead of advancing to the next - potentially overwriting earlier bytes. Application firmware must enforce page-aligned writes or split multi-page transfers, as detailed in Figure 6-2 and Section 6.3 of DS20001710M.