Microchip Technology AT24C02AN-10SI-2.7-T

Overview

AT24C02AN-10SI-2.7-T from Microchip Technology (formerly Atmel) is a 2 Kbit (256 × 8) two-wire serial EEPROM with hardware write protection, optimized for low-voltage industrial applications. It operates from 2.7V to 5.5V, supports 400 kHz I²C clock rate at 2.7V+, delivers 1 million write cycles endurance, and retains data for 100 years. It is used in embedded system configuration storage, sensor calibration data retention, and power-fail-safe parameter logging.

For engineers reviewing the AT24C02AN-10SI-2.7-T datasheet, AT24C02AN-10SI-2.7-T pinout, AT24C02AN-10SI-2.7-T application, or AT24C02AN-10SI-2.7-T equivalent, key selection considerations include its 8-lead SOIC package, WP pin-based hardware write protection, 8-byte page write capability, −40°C to +85°C automotive-grade temperature range, and compatibility with standard I²C bus timing requirements.

Technical Context

The AT24C02AN-10SI-2.7-T implements a two-wire (I²C-compatible) serial interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. It uses hardwired A0–A2 address pins to support up to eight devices on a single bus and features an open-drain bidirectional SDA line requiring external pull-up.

Its internal architecture organizes memory as 32 pages of 8 bytes each, enabling partial page writes and supporting byte-write and page-write modes with self-timed 5 ms max write cycles. The WP pin enables hardware-level upper-half array protection when tied to VCC.

Key Specifications

Pinout & Package

AT24C02AN-10SI-2.7-T is supplied in an 8-lead JEDEC SOIC (8S1) package: 0.150" wide, gull-wing leads, body size 4.9 mm × 3.9 mm, pitch 1.27 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M24C02-RMN6TP and CAT24C02WI-GT3, the AT24C02AN-10SI-2.7-T uniquely combines hardware WP with automotive-grade temperature rating and Atmel's proven reliability profile - making it preferred for safety-critical or field-deployed systems requiring guaranteed write-lock behavior.

Availability

AT24C02AN-10SI-2.7-T is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, medical instrumentation, and smart metering applications requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for AT24C02AN-10SI-2.7-T 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 provider of microcontroller, analog, FPGA, and memory solutions, with leadership in embedded control and secure connectivity technologies.

The AT24C02A family was designed specifically for reliable, low-power, two-wire serial data storage in space-constrained industrial and automotive systems - emphasizing write endurance, data retention, and noise-immune bus operation.

FAQ

What is the maximum I²C clock frequency supported by the AT24C02AN-10SI-2.7-T?

The AT24C02AN-10SI-2.7-T supports up to 400 kHz I²C clock frequency when operated at 2.7V or higher. At 1.8V operation (not applicable to this -2.7 variant), the maximum is 100 kHz. This 400 kHz capability enables efficient bulk writes while remaining compatible with standard I²C timing budgets defined in the specification.

How does the WP pin function on the AT24C02AN-10SI-2.7-T?

On the AT24C02AN-10SI-2.7-T, the WP (Write Protect) pin provides hardware-level memory protection. When WP is tied to GND, full read/write access is enabled. When WP is tied to VCC, writes to the upper half of memory (addresses 0x80–0xFF, i.e., 1Kbit) are blocked - preserving critical configuration data even during unintended firmware writes.

Is the AT24C02AN-10SI-2.7-T pin-compatible with other 2 Kbit I²C EEPROMs in SOIC-8 packages?

Yes, the AT24C02AN-10SI-2.7-T uses the industry-standard 8-lead JEDEC SOIC (8S1) footprint and matches the pinout of most 2 Kbit I²C EEPROMs including CAT24C02WI-GT3 and ST's M24C02-RMN6TP. However, functional equivalence (e.g., WP behavior, timing, voltage ranges) must be verified per application - the AT24C02AN-10SI-2.7-T specifically implements hardware upper-half array protection.

What is the write endurance and data retention specification for the AT24C02AN-10SI-2.7-T?

The AT24C02AN-10SI-2.7-T is rated for 1,000,000 write cycles and guarantees 100 years of data retention at +25°C. These specifications are validated per JEDEC standards and apply across its full operating temperature range (−40°C to +85°C), ensuring long-term reliability in demanding embedded deployments.

Does the AT24C02AN-10SI-2.7-T require external pull-up resistors on SDA and SCL lines?

Yes, the AT24C02AN-10SI-2.7-T requires external pull-up resistors on both SDA and SCL lines because its I/O buffers use open-drain outputs. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time; 4.7 kΩ is commonly used for standard-speed (100 kHz) and fast-mode (400 kHz) I²C buses.