Microchip Technology AT24C04N-10SC-2.7

Overview

AT24C04N-10SC-2.7 from Microchip Technology (formerly Atmel) is a 4-kbit serial EEPROM IC organized as 512 × 8 bits, operating from 2.7V to 5.5V supply, supporting 100 kHz I²C bus speed, and housed in an 8-lead JEDEC SOIC package. It delivers hardware write protection via the WP pin, Schmitt-triggered noise-immune inputs, and 1 million write cycles endurance for embedded configuration storage in industrial controllers.

For engineers reviewing the AT24C04N-10SC-2.7 datasheet, AT24C04N-10SC-2.7 pinout, AT24C04N-10SC-2.7 application, or AT24C04N-10SC-2.7 equivalent, key selection factors include its 2.7V–5.5V operating range, 100 kHz I²C timing compliance at low voltage, 16-byte page write capability, WP pin-based hardware data lock, and SOIC-8 footprint compatibility with legacy board layouts.

Technical Context

The AT24C04N-10SC-2.7 implements a standard two-wire (I²C-compatible) serial interface with open-drain SDA and active-high SCL, using device addressing with A2/A1 hardwired inputs (A0 is NC). Its internal memory is partitioned into 32 pages of 16 bytes each, requiring a 9-bit word address for random access.

It features Schmitt-trigger inputs on SDA/SCL for robust noise immunity, supports partial page writes within the 16-byte boundary, and enters standby mode automatically after STOP condition receipt-drawing only 1.6 µA typical at 2.7V. Write cycle completion is confirmed via acknowledge polling.

Key Specifications

Pinout & Package

AT24C04N-10SC-2.7 uses an 8-lead JEDEC-standard SOIC (8S1) package, 3.9 mm × 4.9 mm body, 1.27 mm lead pitch, gull-wing leads, and RoHS-compliant matte tin plating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C04N-10SC-2.7, AT24C04D-SSHM-T offers identical 2.7V timing and pinout with optional speed headroom, while M24C04-RMN6TP extends voltage down to 1.8V but requires validation of active-low WP logic and higher standby current impact on battery life.

Availability

AT24C04N-10SC-2.7 is available at Aetrix Electronics and suitable for industrial PLC configuration storage, consumer appliance calibration memory, medical device serial number registry, and automotive body control module settings requiring stable component supply across extended production lifecycles.

Supply support for AT24C04N-10SC-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 memory solutions, with a focus on reliability and long-term product support for industrial and automotive markets.

The AT24C04N-10SC-2.7 belongs to Microchip's legacy AT24C serial EEPROM family, designed specifically for low-power, low-voltage I²C-based nonvolatile data storage in cost-sensitive embedded systems where write endurance and data retention are critical.

FAQ

What is the maximum I²C clock frequency supported by AT24C04N-10SC-2.7 at 2.7V?

The AT24C04N-10SC-2.7 supports up to 100 kHz I²C clock frequency when operated at 2.7V, as specified in its AC characteristics table. This timing is validated across the full commercial temperature range (0°C to +70°C) and ensures robust noise immunity with its Schmitt-trigger inputs. Exceeding this frequency at 2.7V risks setup/hold violations and communication failure.

How does the WP pin function on AT24C04N-10SC-2.7, and what happens when it is left floating?

The WP (Write Protect) pin on AT24C04N-10SC-2.7 is active-high: tying it to VCC disables all write operations (including page and byte writes), while grounding it enables full read/write access. The pin must never be left floating - undefined logic levels may cause intermittent write blocking or unintended data corruption. A pull-down resistor (e.g., 10 kΩ to GND) is recommended if hardware protection is not required.

Can AT24C04N-10SC-2.7 be used interchangeably with AT24C04-10SC-2.7 in existing designs?

Yes - AT24C04N-10SC-2.7 and AT24C04-10SC-2.7 share identical electrical specifications, pinout, package (SOIC-8), memory organization (512 × 8), and timing behavior. The "N" suffix denotes tape-and-reel packaging per Microchip's ordering convention and does not affect functionality, making them drop-in replacements in both schematic and layout.

What is the memory page structure of AT24C04N-10SC-2.7, and how does it affect write operations?

The AT24C04N-10SC-2.7 organizes its 4Kbit memory into 32 pages of 16 bytes each. During page write mode, up to 16 sequential bytes can be written in a single I²C transaction - but crossing a 16-byte boundary causes automatic rollover to the start of the same page. This structure requires firmware to align multi-byte writes to page boundaries for optimal efficiency and avoid unintentional overwrites.

Does AT24C04N-10SC-2.7 support standard I²C protocol, including repeated START conditions and ACK polling?

Yes - AT24C04N-10SC-2.7 fully complies with standard I²C protocol: it recognizes repeated START conditions for random reads, responds with ACK after valid device addresses and data bytes, and supports ACK polling to detect write cycle completion. Its SDA line is open-drain with internal weak pull-up, enabling wire-OR bus topology with other I²C peripherals without external logic.