Microchip Technology AT24C08BY6-YH-T

Overview

AT24C08BY6-YH-T from Microchip Technology (formerly Atmel) is an 8K-bit (1024 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems. It operates from 1.8 V to 5.5 V, supports up to 1 MHz I²C communication at 5 V and 400 kHz at 1.8 V, features hardware write protection via the WP pin, and delivers 1 million write cycles with 100-year data retention. It is commonly used in industrial sensor calibration storage and IoT device configuration memory.

For engineers reviewing the AT24C08BY6-YH-T datasheet, AT24C08BY6-YH-T pinout, AT24C08BY6-YH-T application, or AT24C08BY6-YH-T equivalent, key selection criteria include its 8-lead Ultra-Thin Mini-MAP (MLP 2×3 mm) package, 16-byte page write capability, Schmitt-triggered noise-immune inputs, and compatibility with standard I²C bus timing requirements across 1.8–5.5 V supply rails.

Technical Context

The AT24C08BY6-YH-T implements a standard two-wire (I²C-compatible) interface with open-drain SDA and input-clocked SCL, supporting both byte and 16-byte page writes. Its internal address counter enables sequential reads and current-address access without re-sending the word address.

Hardware addressing uses only the A2 pin (A0 and A1 are no-connects), allowing up to two AT24C08B devices on a shared bus. The WP pin provides full-array hardware write protection when pulled high, while the device incorporates internal high-voltage pump and timing circuitry for self-timed 5 ms max write cycles.

Key Specifications

Pinout & Package

AT24C08BY6-YH-T is housed in an 8-lead Ultra-Thin Mini-MAP (MLP 2×3 mm, 0.5 mm pitch) dual-no-lead package with exposed thermal pad (non-functional, optional grounding). Pin 1 is marked by a dot in the top-left corner of the package top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C08D-YU-YM-T, the AT24C08BY6-YH-T offers identical functionality at lower cost for standard industrial use, while M95M01-RMN6TP trades I²C simplicity for SPI speed and density-requiring board and firmware redesign.

Availability

AT24C08BY6-YH-T is available at Aetrix Electronics and suitable for industrial sensor calibration, IoT device configuration storage, and smart energy metering requiring stable component supply across multi-year production cycles.

Supply support for AT24C08BY6-YH-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 for industrial, automotive, and consumer applications.

The AT24C08B series belongs to Microchip's legacy serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile storage in resource-constrained embedded systems.

FAQ

What is the memory organization of the AT24C08BY6-YH-T?

The AT24C08BY6-YH-T contains 8192 bits of EEPROM memory organized as 1024 words of 8 bits each, internally segmented into 64 pages of 16 bytes. This structure supports both single-byte and 16-byte page writes, with automatic address incrementing within each page. The device requires a 10-bit data word address for random access, and the A2 pin serves as the sole hardware address bit for bus arbitration.

Does the AT24C08BY6-YH-T support 1.8 V operation with full I²C speed compliance?

Yes, the AT24C08BY6-YH-T fully supports 1.8 V operation with guaranteed 400 kHz I²C clock frequency compliance per its AC specifications. It meets tLOW, tHIGH, tSU.STA, and tHD.STA timing requirements at 1.8 V, and includes Schmitt-triggered inputs with 50 ns noise filtering to ensure robust communication in low-voltage, noisy environments.

How does the WP pin function on the AT24C08BY6-YH-T?

The WP (Write Protect) pin on the AT24C08BY6-YH-T is an active-high hardware control that disables all write operations-including byte writes, page writes, and write cycles-when pulled to VCC. When WP is grounded or left floating (with internal pull-down inactive), normal read/write functionality is enabled. This feature provides deterministic, non-software-dependent protection against unintended memory corruption.

What package type is used for the AT24C08BY6-YH-T, and what are its key mechanical dimensions?

The AT24C08BY6-YH-T uses the 8Y6 package: an 8-lead Ultra-Thin Mini-MAP (MLP) dual-no-lead package measuring 2.00 mm × 3.00 mm with 0.50 mm pitch. It features a 1.50 mm × 1.50 mm exposed thermal pad (non-functional, optional grounding), 0.20–0.40 mm lead height, and pin 1 identified by a top-surface dot. This compact, low-profile package supports automated assembly and high-density PCB layouts.

Can the AT24C08BY6-YH-T be used interchangeably with the AT24C04B series on the same I²C bus?

No - the AT24C08BY6-YH-T and AT24C04B series are not interchangeable on the same bus without address conflict risk. The AT24C08B uses only A2 for hardware addressing (1010x000 format), while the AT24C04B uses A2 and A1 (1010xx0), resulting in different 7-bit device addresses. Mixing them requires careful address assignment and separate WP pin handling, as their memory maps and page boundaries also differ.