Microchip Technology AT24C02A-10TI-2.7

Overview

AT24C02A-10TI-2.7 from Microchip Technology (formerly Atmel) is a 2 Kbit I²C-compatible serial EEPROM with hardware write protection, organized as 256 × 8 bits, operating from 2.7V to 5.5V, and rated for −40°C to +85°C industrial temperature range. It supports 400 kHz clock rate at 2.7V/5V, features Schmitt-trigger inputs for noise immunity, and delivers 1 million write cycles with 100-year data retention - used in embedded system configuration storage, sensor calibration data logging, and power-meter firmware parameter backup.

For engineers reviewing the AT24C02A-10TI-2.7 datasheet, AT24C02A-10TI-2.7 pinout, AT24C02A-10TI-2.7 application, or AT24C02A-10TI-2.7 equivalent, key selection considerations include its 8-pin TSSOP package, WP pin-based hardware write protection, 8-byte page write capability, and compatibility with standard two-wire I²C bus timing at 2.7V–5.5V supply.

Technical Context

The AT24C02A-10TI-2.7 implements a two-wire serial interface compliant with I²C protocol, using open-drain SDA and edge-triggered SCL pins with Schmitt-trigger filtering on all inputs. Its internal address counter supports current-address, random-address, and sequential read modes, while write operations use either byte or 8-byte page mode with self-timed 5 ms max write cycle.

Device addressing uses three hardwired A0–A2 pins to support up to eight devices on one bus; the WP pin enables hardware-level protection of the upper half (1K) of memory when pulled high. The part operates across 2.7V–5.5V with standby current as low as 1.6 µA at 2.7V, making it suitable for battery-backed and low-power industrial nodes.

Key Specifications

Pinout & Package

AT24C02A-10TI-2.7 is supplied in an 8-lead Plastic Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, with 0.65 mm lead pitch and 4.4 mm body width. Pin 1 is marked by a beveled corner or dot indicator.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C02A-10TI-2.7, the M24C02-RMN6TP trades hardware write protection for lower unit cost and broader voltage tolerance, while the CAT24C02WI-GT3 matches pinout and interface but sacrifices industrial temperature capability - making AT24C02A-10TI-2.7 the only option meeting full AEC-Q100 Class 3 and hardware-lock requirements simultaneously.

Availability

AT24C02A-10TI-2.7 is available at Aetrix Electronics and suitable for smart energy metering, industrial PLC configuration, automotive body control modules, and medical diagnostic equipment requiring stable component supply across long production lifecycles.

Supply support for AT24C02A-10TI-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 expertise.

The AT24C02A-10TI-2.7 belongs to Microchip's legacy serial EEPROM product line, designed specifically for robust, low-power, I²C-based configuration and calibration data storage in harsh industrial and automotive environments.

FAQ

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

The AT24C02A-10TI-2.7 supports up to 400 kHz clock frequency when operated at 2.7V or 5V supply. At 1.8V (not applicable to this -2.7 variant), the maximum is 100 kHz. This timing is validated per Table 5 AC Characteristics in the official datasheet, with tLOW/tHIGH minima of 1.2 µs/0.6 µs respectively.

Does the AT24C02A-10TI-2.7 have hardware write protection, and how is it implemented?

Yes, the AT24C02A-10TI-2.7 includes a dedicated Write Protect (WP) pin. When WP is tied to VCC, the upper half (1K) of the 2K memory array is locked against write or erase operations. When WP is grounded, full read/write access is enabled. This hardware-level lock operates independently of I²C commands and persists across power cycles.

What package type is used for the AT24C02A-10TI-2.7, and what are its key mechanical dimensions?

The AT24C02A-10TI-2.7 uses an 8-lead TSSOP (Thin Shrink Small Outline Package), designated as 8A2 per Microchip's ordering guide. Its body measures 4.4 mm wide × 3.0 mm deep × 1.2 mm max height, with 0.65 mm lead pitch and gull-wing leads conforming to JEDEC MO-153 standards.

How many devices can share the same I²C bus with the AT24C02A-10TI-2.7, and what determines uniqueness?

Up to eight AT24C02A-10TI-2.7 devices can coexist on a single I²C bus. Uniqueness is determined by the three hardwired address inputs A2, A1, and A0, which form the three LSBs of the 7-bit slave address (base 0x50). Each device must have a distinct A2:A0 combination to avoid address collision.

What is the write endurance and data retention specification for the AT24C02A-10TI-2.7?

The AT24C02A-10TI-2.7 is specified for 1 million write/erase cycles and 100 years of data retention at 25°C. These values are characterized per Table 5 (Endurance) and DC Characteristics section of the datasheet, and apply across the full −40°C to +85°C operating range with derating per JEDEC standards.