Microchip Technology AT24C02A-10PC-2.7

Overview

AT24C02A-10PC-2.7 from Microchip Technology (formerly Atmel) is a 2K-bit (256 × 8) I²C-compatible serial EEPROM with hardware write protection, low-voltage operation (2.7V–5.5V), and 100 kHz maximum clock frequency. It features Schmitt-trigger inputs for noise immunity, 8-byte page write capability, and 1 million write cycles endurance. It is used in embedded systems for storing calibration data, configuration settings, and firmware parameters.

For engineers reviewing the AT24C02A-10PC-2.7 datasheet, AT24C02A-10PC-2.7 pinout, AT24C02A-10PC-2.7 application, or AT24C02A-10PC-2.7 equivalent, key selection considerations include its 2.7V minimum supply, 8-pin PDIP package, WP pin-based hardware write protection, and compatibility with microcontroller I²C peripherals operating at 100 kHz in low-power industrial environments.

Technical Context

The AT24C02A-10PC-2.7 implements a standard two-wire I²C interface with open-drain SDA and input-only SCL, supporting start/stop conditions, ACK polling, and byte/page write protocols. Its internal address counter enables current-address and sequential reads without retransmitting the word address.

It uses hard-wired A0–A2 pins for device addressing (up to eight devices on one bus), a dedicated WP pin that disables writes when pulled high, and internally timed 10 ms write cycles with automatic completion detection via ACK polling - all compliant with I²C bus timing requirements for 100 kHz operation at VCC ≥ 2.7V.

Key Specifications

Pinout & Package

AT24C02A-10PC-2.7 is supplied in an 8-lead, 0.300" wide plastic dual-inline package (PDIP), per JEDEC MS-001 BA standard. Pin 1 is marked by a notch or dot; leads are numbered counterclockwise from pin 1.

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 AT24C02A-10PC-2.7 offers standardized active-high WP control and broader legacy design support, while CAT24C02WI-GT3 provides true pin-to-pin interchangeability, and M24C02-RMN6TP suits designs already committed to ST's ecosystem and active-low protection schemes.

Availability

AT24C02A-10PC-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer device configuration, medical instrument settings, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AT24C02A-10PC-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 acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT24CxxA EEPROM family. The company specializes in microcontrollers, analog, and memory solutions for embedded markets.

The AT24C02A-10PC-2.7 belongs to Microchip's serial EEPROM product line, designed specifically for low-power, I²C-based nonvolatile data storage in cost-sensitive, space-constrained embedded systems across industrial, automotive, and consumer applications.

FAQ

What is the maximum I²C clock frequency supported by the AT24C02A-10PC-2.7?

The AT24C02A-10PC-2.7 supports a maximum clock frequency of 100 kHz when operating within its specified 2.7V–5.5V supply range. This limit is defined by AC timing parameters tLOW and tHIGH at 2.7V, ensuring reliable setup/hold margins and noise immunity in low-voltage applications. It does not support 400 kHz operation - that capability applies only to the 5.0V version (e.g., AT24C02A-10PC).

How does the Write Protect (WP) pin function on the AT24C02A-10PC-2.7?

On the AT24C02A-10PC-2.7, the WP pin is active-high: when pulled to VCC, it disables all write operations (including byte and page writes) to the entire memory array, while permitting unrestricted reads. When grounded, full read/write access is enabled. This hardware lock operates independently of I²C commands and remains effective during power transitions.

What package type is used for the AT24C02A-10PC-2.7?

The AT24C02A-10PC-2.7 uses an 8-lead, 0.300" wide plastic dual-inline package (PDIP), designated as package code 8P3 per Atmel's ordering information. Its pinout matches JEDEC MS-001 BA standard, with pin 1 located at the left end of the notch-marked side, and is compatible with through-hole PCB assembly and socket-based prototyping.

Can the AT24C02A-10PC-2.7 be used in automotive applications?

Yes - the AT24C02A-10PC-2.7 is rated for commercial temperature range (0°C to +70°C), but industrial-grade variants (e.g., AT24C02A-10PI-2.7) operate from -40°C to +85°C and meet AEC-Q200 stress testing requirements. For under-hood or dashboard automotive use, the industrial version is recommended; the -10PC-2.7 variant is suited for cabin-located infotainment or accessory modules with controlled ambient conditions.

What is the memory organization and addressing scheme of the AT24C02A-10PC-2.7?

The AT24C02A-10PC-2.7 contains 256 words of 8 bits each (2048 bits total), organized as a single 256-byte linear array. It uses a 7-bit I²C slave address formed by fixed prefix "1010" plus three programmable bits (A2, A1, A0), followed by a read/write bit. Internal word addressing requires an 8-bit data address, supporting random and sequential read/write operations across the full memory space.