Microchip Technology AT24C01A-10SU-2.7-T

Overview

AT24C01A-10SU-2.7-T from Microchip Technology is a 1K-bit (128 × 8) two-wire serial EEPROM optimized for low-voltage industrial applications. It operates from 2.7V to 5.5V, supports 100 kHz I²C communication, features hardware write protection via the WP pin, and delivers 1 million write cycles with 100-year data retention in an 8-lead JEDEC SOIC package.

For engineers reviewing the AT24C01A-10SU-2.7-T datasheet, AT24C01A-10SU-2.7-T pinout, AT24C01A-10SU-2.7-T application, or AT24C01A-10SU-2.7-T equivalent, key selection considerations include its 2.7V–5.5V supply range, 8-byte page write capability, Schmitt-triggered noise-immune inputs, and compatibility with standard I²C bus timing at 100 kHz.

Technical Context

The AT24C01A-10SU-2.7-T implements a fixed 7-bit device address with three hard-wired A0–A2 pins, enabling up to eight devices on a shared I²C bus. Its internal memory is organized into 16 pages of 8 bytes each, requiring a 7-bit word address for random access.

It uses open-drain SDA/SCL interfaces compliant with I²C protocol, supports acknowledge polling during write cycles, and incorporates Schmitt-triggered inputs with built-in noise filtering - critical for reliable operation in electrically noisy industrial environments.

Key Specifications

Pinout & Package

Package: 8-lead JEDEC SOIC (8S1), 0.150" wide body, RoHS-compliant green package with NiPdAu lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C01B-SSHM-T, the AT24C01A-10SU-2.7-T lacks enhanced ESD protection but remains suitable for cost-optimized industrial designs; versus M24C01-RMN6TP, it offers stricter 100 kHz timing compliance at 2.7V and simpler address configuration, reducing firmware validation effort.

Availability

AT24C01A-10SU-2.7-T is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and consumer remote control memory requiring stable component supply and long-term obsolescence management.

Supply support for AT24C01A-10SU-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 leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona.

The AT24C01A belongs to Microchip's serial EEPROM product line, designed specifically for low-power, low-voltage embedded systems requiring reliable nonvolatile storage in space-constrained industrial and automotive applications.

FAQ

What is the maximum I²C clock frequency supported by the AT24C01A-10SU-2.7-T?

The AT24C01A-10SU-2.7-T supports up to 100 kHz I²C clock frequency when operating within its 2.7V–5.5V supply range. This is specified in the AC Characteristics table under fSCL for 2.7V/5.0V operation. Higher frequencies (e.g., 400 kHz) apply only to 1.8V versions - not the -2.7-T variant. The 100 kHz limit ensures timing margin and noise resilience in industrial environments.

Does the AT24C01A-10SU-2.7-T require external pull-up resistors on SDA and SCL lines?

Yes, the AT24C01A-10SU-2.7-T requires external pull-up resistors on both SDA and SCL lines because it uses open-drain outputs. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and speed requirements. The AT24C01A-10SU-2.7-T datasheet specifies that SDA and SCL must be pulled high externally to ensure proper I²C bus signaling and ACK/NACK generation.

How many devices can share the same I²C bus with the AT24C01A-10SU-2.7-T?

Up to eight AT24C01A-10SU-2.7-T devices can share one I²C bus. This is enabled by the three hardware-configurable address pins (A0, A1, A2), which generate a unique 3-bit portion of the 7-bit device address (1010xxx). Each combination of A0–A2 ties yields a distinct address, allowing concurrent addressing without software arbitration.

What happens when the WP pin of the AT24C01A-10SU-2.7-T is connected to VCC?

When the WP pin of the AT24C01A-10SU-2.7-T is connected to VCC, full hardware write protection is activated: all write operations (byte, page, and erase) to the entire 1K-bit memory array are disabled. Reads remain functional. This state prevents accidental or malicious overwrites - critical for safeguarding calibration data or firmware configuration stored in the AT24C01A-10SU-2.7-T.

Is the AT24C01A-10SU-2.7-T suitable for automotive applications?

The AT24C01A-10SU-2.7-T is rated for industrial temperature (–40°C to +85°C) and qualified for automotive body electronics per manufacturer documentation, though it is not AEC-Q100 certified. It is commonly used in automotive body control modules for storing mirror positions or lighting configurations. For safety-critical powertrain or ADAS systems, Microchip's AEC-Q100-qualified AT24C01C variants are recommended instead of the AT24C01A-10SU-2.7-T.