Microchip Technology AT24C02N-10SI

Overview

AT24C02N-10SI from Microchip Technology (formerly Atmel) is a 2 Kbit (256 × 8) I²C-compatible serial EEPROM with 2.7V to 5.5V supply operation, 100 kHz clock frequency at 2.7V, 8-byte page write capability, and industrial temperature range (–40°C to +85°C). It serves as nonvolatile configuration storage in microcontroller-based systems requiring low-power, space-constrained data retention.

For engineers reviewing the AT24C02N-10SI datasheet, AT24C02N-10SI pinout, AT24C02N-10SI application, or AT24C02N-10SI equivalent, key selection criteria include its 2.7V minimum VCC, 10 ms max write cycle time, hardware write protection via WP pin, and JEDEC SOIC-8 package compatibility with legacy board layouts.

Technical Context

The AT24C02N-10SI implements a two-wire (I²C) serial interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. Its internal memory is organized as 32 pages of 8 bytes each, requiring an 8-bit word address for random access.

Device addressing uses hardwired A0–A2 pins (all active for AT24C02), enabling up to eight devices on one bus. Write protection is controlled by the WP pin: grounded for full read/write access, tied to VCC to lock the entire 2K array.

Key Specifications

Pinout & Package

AT24C02N-10SI is housed in an 8-lead JEDEC SOIC package (package code 8S1), measuring 3.9 mm × 4.9 mm × 1.75 mm, with gull-wing leads and 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C02N-10SI, AT24C02D-SSHM-T extends voltage range downward and improves ESD tolerance, while M24C02-RMN6TP enables higher-speed I²C at lower voltages-neither is pin-compatible drop-in replacements, but both serve overlapping configuration-storage roles with distinct electrical trade-offs.

Availability

AT24C02N-10SI is available at Aetrix Electronics and suitable for smart energy metering, industrial PLC I/O modules, automotive body control units, and medical infusion pumps requiring stable component supply across extended product lifecycles.

Supply support for AT24C02N-10SI 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 acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT24Cxx EEPROM family, delivering high-reliability nonvolatile memory solutions since 1980.

The AT24C02N-10SI belongs to Microchip's serial EEPROM product line, engineered specifically for robust, low-power configuration storage in industrial, automotive, and medical systems where data integrity and long-term retention are mission-critical.

FAQ

What is the maximum clock frequency supported by AT24C02N-10SI at 2.7V?

The AT24C02N-10SI supports a maximum I²C clock frequency of 100 kHz when operating at 2.7V. This is explicitly specified in the AC Characteristics table of the official datasheet and reflects timing margins optimized for noise immunity in industrial voltage domains. Higher frequencies (e.g., 400 kHz) require ≥4.5V VCC per the device's voltage-grade binning.

Does AT24C02N-10SI support partial page writes?

Yes, AT24C02N-10SI supports partial page writes: up to eight consecutive bytes can be written in a single page-write transaction, starting at any address aligned within the same 8-byte page boundary. The internal address counter increments automatically, and crossing the page boundary wraps to the start of the same page-enabling efficient burst updates without host-side address management.

How does the WP pin function on AT24C02N-10SI?

On AT24C02N-10SI, the WP (Write Protect) pin provides hardware-level write inhibition. When WP is tied to VCC, the entire 2K memory array is locked against write operations-including byte, page, and erase commands-while reads remain fully functional. Grounding WP restores full read/write capability. This behavior is electrically enforced and requires no firmware intervention.

What package type is used for AT24C02N-10SI?

AT24C02N-10SI uses an 8-lead JEDEC SOIC package (package code 8S1), with 3.9 mm × 4.9 mm body dimensions, 1.27 mm lead pitch, and gull-wing surface-mount leads. This package is RoHS-compliant, reflow-solderable, and mechanically identical to industry-standard SOIC-8 footprints used across decades of industrial PCB designs.

Is AT24C02N-10SI qualified for automotive applications?

AT24C02N-10SI is rated for industrial temperature range (–40°C to +85°C) and is widely deployed in automotive body electronics such as door modules and lighting controllers. While not AEC-Q100 certified as a standalone component, its qualification aligns with many Tier-1 subsystem requirements where EEPROM functionality is part of a broader qualified module design.