Microchip Technology

AT24C02C-MAHM-T

A: The device operates over a wide supply voltage range of 1.7V to 5.5V, allowing direct interface with 1.8V, 2.5V, 3.3V, and 5V systems without external level shifters. It supports I²C clock frequencies of 100kHz (Standard‑mode), 400kHz (Fast‑mode at 1.7V), and up to 1MHz (Fast‑mode Plus at supply voltages >2.5V), with a typical access time of 550ns. The device features a self‐timed write cycle with a maximum duration of 5ms per word or page and offers both byte‑write and 8‑byte page‑write modes for flexible and efficient data storage. Low power consumption is a key advantage: standby current is as low as 1µA (max 6µA), active read current is 1mA max, and write current is 3mA max.

A: The AT24C02C-MAHM-T communicates via a standard I²C (2‑wire) serial interface consisting of the Serial Data (SDA) line and the Serial Clock (SCL) line. The device incorporates Schmitt trigger inputs and filtered inputs for enhanced noise suppression, ensuring robust data transfer in electrically noisy environments. It features three hardware address pins (A0, A1, A2) that allow up to eight AT24C02C devices to share the same I²C bus without address conflicts. The I²C control byte is 1010DDDR, where the “DDD” bits correspond to the A2, A1, and A0 pin logic states, and the “R” bit specifies the read or write operation. The device also includes a hardware Write Protect (WP) pin that, when tied high, disables write operations to the entire memory array, providing full hardware data protection.

A: The AT24C02C-MAHM-T is rated for a minimum endurance of 1,000,000 (1 million) write/erase cycles per memory cell, ensuring long‑term reliability for applications that require frequent data updates. In addition, the device guarantees a data retention time of more than 100 years, meaning that stored information will remain intact and reliable over an extended operational lifespan. These high‑reliability specifications, combined with self‑timed write cycles (5ms max), make the device suitable for mission‑critical data storage applications.

A: Thanks to its wide operating voltage range (1.7V–5.5V), industrial temperature rating (–40°C to +85°C, with Grade 1 AEC‑Q100 compliance up to 125°C available), low power consumption, and compact UDFN‑8 (2×3mm) footprint, the AT24C02C-MAHM-T is well‑suited for a broad range of electronic systems across multiple industries, including: Consumer electronics: Storing user settings, calibration data, and device preferences in smart home appliances, TVs, set‑top boxes, and wearables. Industrial automation: Storing system configuration parameters, calibration constants, and operational logs in PLCs, industrial sensors, and HMIs. Automotive electronics: For vehicle diagnostics, engine control units (ECUs), and dashboard displays where reliable non‑volatile memory is essential. Smart meters and IoT devices: Handling data logging, energy measurement, and configuration updates in electricity, water, and gas metering equipment, as well as IoT sensor nodes. Medical devices: Securely storing critical device identification, calibration information, and usage logs in monitors, infusion pumps, and other medical equipment. Telecommunications: Managing firmware parameters and system configurations in networking and communication hardware.