Microchip Technology 24FC04H-E/SN

Overview

24FC04H-E/SN from Microchip Technology Inc. is a 4-Kbit I²C-compatible serial EEPROM organized as two 256 × 8-bit blocks, supporting 1 MHz clock operation down to 1.7V supply, with 16-byte page write buffer and hardware half-array write-protection (100h–1FFh). It delivers ≤1 µA standby current (E-temp), >1 million erase/write cycles, and >200-year data retention for nonvolatile configuration storage in automotive and industrial control modules.

For engineers reviewing the 24FC04H-E/SN datasheet, 24FC04H-E/SN pinout, 24FC04H-E/SN application, or 24FC04H-E/SN equivalent, this page provides verified electrical specs, SOIC-8 pin mapping, I²C timing compliance at 1 MHz (1.7–5.5V), E-temp qualification (-40°C to +125°C), and validated alternatives for automotive-grade EEPROM replacement.

Technical Context

The 24FC04H-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 address counter supports current-address, random, and sequential read modes, while the 16-byte page buffer enables efficient burst writes within physical page boundaries (00h–0Fh, 10h–1Fh, etc.).

Write protection is implemented via the WP pin: tied to VCC, it disables writes to addresses 100h–1FFh while allowing full read access; tied to VSS, full memory access is enabled. Acknowledge polling is supported to detect write-cycle completion without fixed delays.

Key Specifications

Pinout & Package

24FC04H-E/SN is packaged in an 8-lead narrow SOIC (SN) body (3.90 mm width), RoHS-compliant, with standard JEDEC MS-012AC footprint and 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24AA04H-I/SN, the 24FC04H-E/SN delivers 2.5× faster I²C throughput and extended temperature capability; versus AT24C04D-SSHM-T, it provides integrated hardware write-protection - eliminating firmware complexity and failure modes in safety-critical calibration storage.

Availability

24FC04H-E/SN is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLCs, and medical infusion pumps requiring stable component supply, AEC-Q100 qualification, and guaranteed 1.7V operation.

Supply support for 24FC04H-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, serving automotive, industrial, and communications markets with high-reliability silicon.

The 24FC04H belongs to Microchip's 24XX04H family of I²C EEPROMs designed specifically for robust, low-voltage, high-endurance nonvolatile storage in harsh environments - emphasizing AEC-Q100 compliance, wide VCC range, and noise-immune bus interfaces.

FAQ

What is the maximum I²C clock frequency supported by the 24FC04H-E/SN?

The 24FC04H-E/SN supports up to 1 MHz I²C clock frequency across its full 1.7V–5.5V supply range, unlike the 24AA04H (max 400 kHz) or 24LC04BH (max 400 kHz, min 2.5V). This is confirmed in Table 1-2 of DS20002119C, where FCLK = 1000 kHz is specified for 24FC04H at 1.7V ≤ VCC ≤ 5.5V. The 24FC04H-E/SN achieves this with optimized internal timing and slope-controlled outputs.

Does the 24FC04H-E/SN require external pull-up resistors on SDA and SCL?

Yes, the 24FC04H-E/SN 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 (per Section 2.2 of DS20002119C). Incorrect pull-up values cause timing violations - too weak causes slow rise times; too strong increases power and risks exceeding IOL limits.

How does the write-protect (WP) pin function on the 24FC04H-E/SN?

On the 24FC04H-E/SN, the WP pin enables hardware-level protection of the upper 256-byte memory block (addresses 100h–1FFh). When WP = VCC, writes to that region are inhibited while reads remain fully functional; when WP = VSS, full memory access is permitted. This is distinct from byte-level software locks and requires no firmware overhead - a key differentiator from alternatives like AT24C04D.

Is the 24FC04H-E/SN AEC-Q100 qualified, and what grade does it meet?

Yes, the 24FC04H-E/SN is AEC-Q100 qualified for Grade 1 (−40°C to +125°C ambient), as explicitly stated in the "Features" section of DS20002119C. This qualification covers stress testing for temperature cycling, humidity, ESD (>4 kV), and lifetime endurance - making it suitable for automotive powertrain and chassis applications where reliability is mandated.

What is the page size and maximum page write length for the 24FC04H-E/SN?

The 24FC04H-E/SN has a 16-byte page buffer and enforces physical page boundaries aligned to 16-byte offsets (00h–0Fh, 10h–1Fh, etc.). A single page write operation can transmit up to 16 bytes before issuing a Stop condition; attempting to cross a boundary wraps data to the start of the same page. This behavior is documented in Figure 6-2 and Section 6.2 of DS20002119C.