Microchip Technology AT24C1024W-10SU-2.7-T

Overview

AT24C1024W-10SU-2.7-T from Microchip Technology (formerly Atmel) is a 1 Mbit (131,072 × 8) two-wire serial EEPROM IC designed for nonvolatile data storage in embedded control and instrumentation systems. It operates from 2.7V to 5.5V, supports 400 kHz I²C communication at 2.7V, features hardware write protection via the WP pin, and delivers 100,000 write cycles per page with 40-year data retention.

For engineers reviewing the AT24C1024W-10SU-2.7-T datasheet, AT24C1024W-10SU-2.7-T pinout, AT24C1024W-10SU-2.7-T application, or AT24C1024W-10SU-2.7-T equivalent, key selection criteria include its 8-lead EIAJ SOIC package, 256-byte page write capability, Schmitt-triggered noise-immune inputs, and support for cascaded dual-device bus configurations.

Technical Context

The AT24C1024W-10SU-2.7-T implements a standard I²C-compatible two-wire interface with open-drain SDA and edge-triggered SCL, enabling multi-drop bus operation. Its internal 17-bit address space maps to 512 pages of 256 bytes each, with device addressing controlled by the A1 pin to allow up to two devices on one bus.

It uses an internal self-timed write cycle (typ. 5 ms) with acknowledge polling support, and integrates Schmitt-triggered inputs with input filtering for robust operation in electrically noisy environments. The WP pin provides hardware-level write inhibition when tied to VCC, complementing software-controlled protection schemes.

Key Specifications

Pinout & Package

AT24C1024W-10SU-2.7-T is supplied in an 8-lead EIAJ SOIC package (package code 8S2), measuring 5.13 mm × 5.13 mm × 2.03 mm with 1.27 mm lead pitch and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C1024W-10SU-2.7-T, the PDIP variant trades surface-mount compactness for prototyping flexibility, while the ON Semiconductor alternative maintains identical SOIC fit but omits automotive qualification - making the original the sole choice for AEC-Q100-aligned designs requiring -40°C to +125°C operation.

Availability

AT24C1024W-10SU-2.7-T is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AT24C1024W-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 global semiconductor company specializing in microcontrollers, analog components, and memory solutions, with a focus on embedded control and connectivity.

The AT24C1024W-10SU-2.7-T belongs to Microchip's serial EEPROM product line, engineered for robust, low-power nonvolatile data storage in harsh industrial, automotive, and medical environments where reliability and long-term data integrity are mandatory.

FAQ

What is the maximum I²C clock frequency supported by the AT24C1024W-10SU-2.7-T at 2.7V?

The AT24C1024W-10SU-2.7-T supports a maximum I²C clock frequency of 400 kHz when operating at 2.7V. This is specified in the AC Characteristics table of the official datasheet (Rev. 1471I–SEEPR–7/03), ensuring timing compliance and noise margin in low-voltage systems. The AT24C1024W-10SU-2.7-T maintains full functionality across its 2.7–5.5V range, scaling to 1 MHz at 5V.

How does the WP pin function on the AT24C1024W-10SU-2.7-T?

The WP (Write Protect) pin on the AT24C1024W-10SU-2.7-T is an active-high hardware control that disables all write operations when tied to VCC. When left unconnected, it is internally pulled down to GND, enabling normal writes. This dual-mode behavior allows both permanent hardware lockout and dynamic software-controlled protection. The AT24C1024W-10SU-2.7-T leverages this for fail-safe configuration storage in safety-critical applications.

What package type does the AT24C1024W-10SU-2.7-T use, and what are its key dimensions?

The AT24C1024W-10SU-2.7-T uses an 8-lead EIAJ SOIC package (code 8S2), measuring 5.13 mm × 5.13 mm × 2.03 mm with 1.27 mm lead pitch. Its gull-wing leads are compatible with standard reflow profiles, and the package meets JEDEC MS-012 standards. This compact surface-mount form factor makes the AT24C1024W-10SU-2.7-T ideal for space-constrained industrial and automotive PCBs.

Can multiple AT24C1024W-10SU-2.7-T devices share the same I²C bus?

Yes - up to two AT24C1024W-10SU-2.7-T devices can share a single I²C bus using the A1 pin for hardware device addressing. When A1 is hardwired high or low, each device responds to a unique 7-bit address; when floating, both default to the same address and cannot coexist. This cascading capability enables 2 Mbit total storage without additional I²C ports. The AT24C1024W-10SU-2.7-T supports this architecture per its Device Addressing section.

What is the write endurance and data retention specification for the AT24C1024W-10SU-2.7-T?

The AT24C1024W-10SU-2.7-T guarantees 100,000 write cycles per memory page and 40 years of data retention at 25°C, as confirmed in the Absolute Maximum Ratings and DC Characteristics sections of the datasheet. These values are measured under standard conditions (5.0V, 25°C, page mode) and represent minimum guaranteed performance - the AT24C1024W-10SU-2.7-T exceeds these specs in typical use cases involving partial-page writes and moderate thermal cycling.