Microchip Technology AT24C01A-10TI-1.8-T

Overview

AT24C01A-10TI-1.8-T from Microchip Technology (formerly Atmel) is a 1K-bit (128 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage embedded systems. It operates from 1.8V to 5.5V, supports 100 kHz I²C bus speed at 1.8V, features hardware write protection via the WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in battery-powered IoT sensors for nonvolatile configuration storage.

For engineers reviewing the AT24C01A-10TI-1.8-T datasheet, AT24C01A-10TI-1.8-T pinout, AT24C01A-10TI-1.8-T application, or AT24C01A-10TI-1.8-T equivalent, key selection criteria include 1.8V minimum supply operation, industrial temperature range (−40°C to +85°C), TSSOP-8 package footprint, and page-write capability with 8-byte boundaries.

Technical Context

The AT24C01A-10TI-1.8-T implements a standard two-wire I²C interface with open-drain SDA/SCL pins, Schmitt-trigger inputs for noise immunity, and bi-directional data transfer protocol compliant with I²C specification timing. Its internal architecture organizes memory as 16 pages of 8 bytes each, requiring a 7-bit word address for random access.

Write protection is enforced exclusively through the dedicated WP pin: tied to VCC, it locks the full 1K array; tied to GND, normal read/write operations proceed. The device enters low-power standby mode after STOP condition receipt and supports acknowledge polling to detect write cycle completion.

Key Specifications

Pinout & Package

8-lead Thin Shrink Small Outline Package (TSSOP), JEDEC-compliant, 0.65 mm pitch, 4.4 mm × 3.0 mm body size, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M24C01-RMN6TP and BR24G01FJ-WE2, the AT24C01A-10TI-1.8-T provides deterministic hardware-only write protection and is validated for consistent 100 kHz operation across its full 1.8V–5.5V range, making it optimal for safety-critical or legacy-system-replacement designs where simplicity and timing predictability are prioritized.

Availability

AT24C01A-10TI-1.8-T is available at Aetrix Electronics and suitable for smart meter calibration storage, medical sensor configuration, automotive body control modules, and industrial PLC I/O mapping requiring stable component supply across extended temperature ranges and low-voltage operation.

Supply support for AT24C01A-10TI-1.8-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 semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with a strong focus on embedded control and secure connectivity.

The AT24C01A series belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile data storage in space- and energy-constrained embedded systems.

FAQ

What is the maximum I²C clock frequency supported by AT24C01A-10TI-1.8-T at 1.8V?

The AT24C01A-10TI-1.8-T supports a maximum I²C clock frequency of 100 kHz when operated at 1.8V. This is explicitly specified in the AC Characteristics table under "2.7-, 2.5-, 1.8-volt" conditions. At higher supply voltages (e.g., 5.0V), the device supports up to 400 kHz, but the AT24C01A-10TI-1.8-T variant is characterized and guaranteed for 100 kHz operation at its rated 1.8V minimum supply.

Does AT24C01A-10TI-1.8-T support page write, and what is the page size?

Yes, the AT24C01A-10TI-1.8-T supports page write with a page size of 8 bytes. As confirmed in the Memory Organization section, the 1K device is internally organized into 16 pages of 8 bytes each. This allows up to 8 sequential bytes to be written in a single I²C transaction, reducing bus overhead compared to individual byte writes. Partial page writes are also permitted.

What is the function of the WP pin on AT24C01A-10TI-1.8-T, and how is it used?

The WP (Write Protect) pin on AT24C01A-10TI-1.8-T provides hardware-level write protection for the entire 1K memory array. When WP is tied to VCC, all write operations (byte and page) are inhibited; when tied to GND, normal read and write functions operate. This behavior is documented in the Pin Description and WP Pin Status table, enabling robust safeguarding against unintended writes during power transitions or firmware errors.

Is AT24C01A-10TI-1.8-T compatible with standard I²C protocol, including start/stop conditions and ACK polling?

Yes, the AT24C01A-10TI-1.8-T fully complies with standard I²C protocol requirements. It recognizes START and STOP conditions, implements 9-bit acknowledge (ACK) after each byte, and supports ACK polling to detect write cycle completion. These behaviors are detailed in the Device Operation section, ensuring interoperability with any standard I²C master controller without custom timing adjustments.

What packaging and lead finish does AT24C01A-10TI-1.8-T use?

The AT24C01A-10TI-1.8-T uses an 8-lead TSSOP (Thin Shrink Small Outline Package), designated as package code "8T" in the Ordering Information table. It features gull-wing leads with 0.65 mm pitch and is RoHS-compliant with matte tin (Sn) lead finish, as confirmed by Microchip's packaging documentation and ordering matrix.