Microchip Technology AT24C01AY1-10YI-2.7

Overview

AT24C01AY1-10YI-2.7 from Microchip Technology is a 1K-bit (128 × 8) two-wire serial EEPROM with 2.7V to 5.5V supply operation, 8-byte page write capability, and hardware write protection via the WP pin. It features Schmitt-trigger inputs for noise immunity, 100 kHz I²C compatibility at 2.7V, and automotive-grade reliability (–40°C to +85°C) in an 8-lead MAP package. It is used for parameter storage in industrial control modules, sensor calibration data retention, and configuration memory in embedded power supplies.

For engineers reviewing the AT24C01AY1-10YI-2.7 datasheet, AT24C01AY1-10YI-2.7 pinout, AT24C01AY1-10YI-2.7 application, or AT24C01AY1-10YI-2.7 equivalent, key selection considerations include its 1K-bit density, 8-lead Miniature Array Package (MAP) footprint, 2.7V–5.5V VCC range, WP-enabled hardware write lock, and 100 kHz I²C timing compliance - all critical for space-constrained, low-voltage industrial designs requiring long-term nonvolatile storage.

Technical Context

The AT24C01AY1-10YI-2.7 implements a standard two-wire (I²C-compatible) serial interface with open-drain SDA and edge-triggered SCL, supporting bidirectional data transfer under master-controlled clocking. Its internal address counter enables sequential reads and supports current-address, random-address, and page-write operations.

It uses hard-wired A0–A2 pins for device addressing (up to eight devices on one bus), integrates Schmitt-trigger and noise-filtered inputs for robustness in electrically noisy environments, and enters low-power standby mode after STOP condition receipt or power-up - drawing only 1.6 µA typical at 2.7V.

Key Specifications

Pinout & Package

AT24C01AY1-10YI-2.7 is housed in an 8-lead Miniature Array Package (MAP), bottom-view pinout with dual footprint compatibility. The package measures 4.90 mm × 3.00 mm × 0.90 mm and features lead-free/halogen-free construction per JEDEC MO-153 standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C01AY1-10YI-2.7, the AT24C02D-10TU-2.7 offers double memory and faster I²C speed but uses TSSOP instead of MAP, while the M95010-WMN6TP replaces I²C with SPI and removes hardware write protection - making both alternatives non-interchangeable without schematic and firmware changes.

Availability

AT24C01AY1-10YI-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, and medical device usage logging requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AT24C01AY1-10YI-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 a focus on reliability, longevity, and industrial-grade qualification.

The AT24C01A family is designed for cost-sensitive, space-constrained embedded systems needing robust, low-power serial EEPROM for configuration, calibration, and event logging - particularly where hardware write protection and extended temperature operation are mandatory.

FAQ

What is the memory organization of the AT24C01AY1-10YI-2.7?

The AT24C01AY1-10YI-2.7 contains 1024 bits organized as 128 words of 8 bits each, internally segmented into 16 pages of 8 bytes. This structure supports both single-byte and 8-byte page writes, with automatic address incrementing within each page. The device uses a 7-bit word address for random access, and the A0–A2 pins set its I²C slave address (0x50–0x57). AT24C01AY1-10YI-2.7 operates without external address latches, simplifying interface design.

Does the AT24C01AY1-10YI-2.7 support 400 kHz I²C operation?

No, the AT24C01AY1-10YI-2.7 is rated for 100 kHz maximum I²C clock frequency at 2.7V. While some AT24C01A variants (e.g., those with process letter "D") support 400 kHz at ≥2.5V, the -2.7 suffix and Y1 package designation confirm this part is optimized for 100 kHz operation in 2.7V–5.5V systems. Exceeding 100 kHz may result in timing violations or failed ACKs. AT24C01AY1-10YI-2.7 complies fully with standard-mode I²C specifications under its rated conditions.

How does the Write Protect (WP) pin function on the AT24C01AY1-10YI-2.7?

On the AT24C01AY1-10YI-2.7, the WP pin provides hardware-level write inhibition: when pulled high to VCC, all write operations (byte, page, and erase) are blocked, though reads remain fully functional. When grounded, normal read/write access is enabled. This feature protects stored data during power-up/down transients or firmware faults. Unlike software locks, WP requires no MCU intervention - making AT24C01AY1-10YI-2.7 ideal for safety-critical parameter storage.

What package type is used for the AT24C01AY1-10YI-2.7?

The AT24C01AY1-10YI-2.7 uses an 8-lead Miniature Array Package (MAP), designated as 8Y1 in Microchip's ordering nomenclature. It measures 4.90 mm × 3.00 mm × 0.90 mm, features non-leaded terminations, and supports dual footprint compatibility. This package offers 30% smaller board area than SOIC-8 while maintaining thermal performance and manufacturability - a key advantage for AT24C01AY1-10YI-2.7 in dense industrial PCB layouts.

Is the AT24C01AY1-10YI-2.7 suitable for automotive applications?

Yes, the AT24C01AY1-10YI-2.7 is qualified for automotive use with an operating temperature range of –40°C to +85°C and lead-free/halogen-free construction. It meets AEC-Q100 stress testing requirements for reliability in harsh environments. Its hardware WP pin, 1M write endurance, and 100-year data retention make AT24C01AY1-10YI-2.7 appropriate for body control modules, sensor calibration storage, and infotainment configuration memory - provided system-level EMI mitigation aligns with its Schmitt-trigger noise immunity.