Microchip Technology AT24C04AN-10SU-2.7

Overview

AT24C04AN-10SU-2.7 from Microchip Technology (formerly Atmel) is a 4-kbit I²C-compatible serial EEPROM organized as 512 × 8 bits, operating from 2.7V to 5.5V, with 400 kHz clock rate at 2.7V/5V, 8-byte page write capability, and automotive-grade −40°C to +85°C temperature range. It serves as nonvolatile configuration storage in microcontroller-based industrial control modules.

For engineers reviewing the AT24C04AN-10SU-2.7 datasheet, AT24C04AN-10SU-2.7 pinout, AT24C04AN-10SU-2.7 application, or AT24C04AN-10SU-2.7 equivalent, key selection criteria include its 2.7V–5.5V supply range, hardware write protection via WP pin, 1 million write cycles endurance, and SOIC-8 green package compliance.

Technical Context

The AT24C04AN-10SU-2.7 implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA and SCL inputs, supporting standard-mode (100 kHz) and fast-mode (400 kHz) operation depending on VCC level. Its internal address decoder uses A2 and A1 pins for hardwired device addressing, while A0 is NC - enabling up to four devices on a single bus.

It features a self-timed 5 ms max write cycle, partial page writes, and acknowledge polling for write completion detection. The WP pin enables hardware-level protection of the upper 2K-bit memory segment when pulled high, distinguishing it from AT24C02A family behavior.

Key Specifications

Pinout & Package

AT24C04AN-10SU-2.7 is housed in an 8-lead JEDEC SOIC (8S1) package, 0.150" wide body, surface-mount compatible with standard reflow profiles. Pin 1 is marked by a beveled corner or notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M24C04-RMN6TP and CAT24C04WI-GT3, the AT24C04AN-10SU-2.7 provides deterministic hardware-based write protection via dedicated WP pin - critical for safety-critical or regulated applications where software-only locks are insufficient.

Availability

AT24C04AN-10SU-2.7 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, and medical infusion pumps requiring stable component supply across extended product lifecycles.

Supply support for AT24C04AN-10SU-2.7 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 is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with broad industrial and automotive qualification capabilities.

The AT24C04AN-10SU-2.7 belongs to Microchip's legacy AT24Cxx serial EEPROM product line, designed specifically for reliable, low-power, I²C-based configuration and calibration data storage in harsh-environment embedded systems.

FAQ

What is the maximum I²C clock frequency supported by the AT24C04AN-10SU-2.7?

The AT24C04AN-10SU-2.7 supports up to 400 kHz I²C clock frequency when operated at VCC = 2.7V or 5.0V. At 1.8V operation (not applicable to this -2.7 variant), the maximum is 100 kHz. This 400 kHz capability enables faster configuration reads during system boot compared to standard-mode EEPROMs, reducing startup latency in real-time control applications. The AT24C04AN-10SU-2.7's Schmitt-triggered SCL input ensures robust timing margin even with signal ringing.

How does the Write Protect (WP) pin function on the AT24C04AN-10SU-2.7?

On the AT24C04AN-10SU-2.7, the WP pin provides hardware-level protection: when pulled high to VCC, it locks the upper 2K-bit memory segment (addresses 0x200–0x3FF), allowing only read access; when grounded, full read/write access is enabled. Unlike AT24C02A, this protection applies to half the array and is independent of software lock bits. This feature is essential for safeguarding calibration data in automotive or medical devices where accidental writes must be physically prevented.

Is the AT24C04AN-10SU-2.7 pin-compatible with other AT24C04 variants?

Yes - the AT24C04AN-10SU-2.7 shares identical pinout, footprint, and electrical interface with all AT24C04A variants in SOIC-8 (8S1) packaging, including AT24C04AN-10SI-2.7 and AT24C04A-10TI-2.7. Differences are limited to packaging markings ("U" = RoHS/halogen-free), temperature screening, and tape-and-reel packaging. No PCB layout changes are required when substituting within the same package type, provided the WP pin and address pins are wired identically.

What is the memory organization and page structure of the AT24C04AN-10SU-2.7?

The AT24C04AN-10SU-2.7 contains 4096 bits organized as 512 words of 8 bits each (512 × 8), internally segmented into 32 pages of 16 bytes. This 16-byte page write capability allows efficient bulk writes - for example, updating an entire sensor calibration table in one I²C transaction instead of 16 separate byte writes. The A2 and A1 pins set the device address, while A0 is NC, enabling up to four AT24C04AN-10SU-2.7 devices on a single I²C bus.

Does the AT24C04AN-10SU-2.7 support partial page writes?

Yes - the AT24C04AN-10SU-2.7 supports partial page writes: after initiating a page write, the host MCU may transmit fewer than 16 bytes before issuing a STOP condition. The EEPROM automatically increments the internal address counter and wraps within the current 16-byte page boundary. This enables flexible updates of non-contiguous configuration fields without overwriting adjacent data - critical for maintaining integrity of mixed-parameter storage such as PID coefficients and alarm thresholds in industrial controllers. The AT24C04AN-10SU-2.7 handles address rollover transparently.