Microchip Technology 24AA08T-I/MNY

Overview

24AA08T-I/MNY from Microchip Technology Inc. is an 8-Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit blocks, operating from 1.7V to 5.5V with 400 kHz max clock frequency, 1 µA standby current, and industrial temperature range (–40°C to +85°C). It features hardware write-protection via the WP pin, 16-byte page write buffer, and Schmitt-trigger inputs for noise immunity - deployed in embedded system configuration storage, sensor calibration data retention, and power-management parameter backup.

For engineers reviewing the 24AA08T-I/MNY datasheet, 24AA08T-I/MNY pinout, 24AA08T-I/MNY application, or 24AA08T-I/MNY equivalent, key selection considerations include VCC compatibility down to 1.7V, I²C timing compliance at 400 kHz (with derating below 2.5V), WP-enabled memory protection, page write latency ≤5 ms, and MNY package-specific footprint and thermal characteristics.

Technical Context

The 24AA08T-I/MNY implements a two-wire I²C interface with fixed 4-bit device code '1010', block-select addressing (B1/B0 bits), and R/W bit control. Its internal architecture includes a 16-byte page latch, HV generator for EEPROM programming, and address pointer auto-increment logic supporting sequential, random, and current-address read modes.

It uses open-drain SDA/SCL with external pull-up resistors (10 kΩ typical at 100 kHz), incorporates Schmitt-trigger inputs and output slope control to suppress ground bounce, and supports acknowledge polling to detect write-cycle completion without fixed delay timing.

Key Specifications

Pinout & Package

24AA08T-I/MNY is supplied in an 8-lead UDFN (Ultra-Thin DFN) package, 2 mm × 3 mm, 0.5 mm pitch, with exposed pad (connected to VSS or left floating per design). Pin numbering follows standard top-view orientation with Pin 1 at top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC08BT-I/MNY, the 24AA08T-I/MNY offers lower-voltage operation critical for 1.8V systems; compared with 24FC08T-I/MNY, it trades 1 MHz speed for broader legacy I²C timing compatibility and proven qualification in cost-sensitive industrial deployments.

Availability

24AA08T-I/MNY is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded system configuration backup, and power management unit parameter storage requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.

Supply support for 24AA08T-I/MNY 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 Inc. is a leading provider of microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24AA08T-I/MNY belongs to Microchip's 24XX08 family of I²C EEPROMs, designed specifically for reliable, low-power, nonvolatile data storage in space-constrained industrial, automotive, and consumer applications where robustness and long-term data integrity are essential.

FAQ

What is the maximum I²C clock frequency supported by the 24AA08T-I/MNY?

The 24AA08T-I/MNY supports up to 400 kHz when VCC is 2.5V or higher. At VCC between 1.7V and 2.5V, the maximum clock frequency is reduced to 100 kHz to ensure timing margin compliance. This dual-speed capability allows flexible deployment across mixed-voltage systems without external clock dividers or protocol translation.

Does the 24AA08T-I/MNY require external pull-up resistors on SDA and SCL lines?

Yes, the 24AA08T-I/MNY has open-drain SDA and SCL pins and requires external pull-up resistors. Typical values are 10 kΩ for 100 kHz operation and 2 kΩ for 400 kHz. The exact value depends on bus capacitance and rise-time requirements specified in the I²C standard and must be validated per target system layout.

How does the WP pin function on the 24AA08T-I/MNY?

When the WP pin of the 24AA08T-I/MNY is tied to VCC, all write operations to the entire 8-Kbit memory array are inhibited - reads remain fully functional. When tied to VSS (or left floating, though not recommended), full read/write access is enabled. This hardware-level protection prevents accidental overwrites during power transients or software faults.

What is the memory organization of the 24AA08T-I/MNY?

The 24AA08T-I/MNY contains 8 Kbit (1024 bytes) of EEPROM organized as four independent 256-word blocks (000–0FF, 100–1FF, 200–2FF, 300–3FF). Block selection is controlled by B1/B0 bits in the I²C client address, enabling logical partitioning of configuration, calibration, and event-log data without software address mapping overhead.

Is the 24AA08T-I/MNY qualified for automotive applications?

No - the 24AA08T-I/MNY carries the "I" (Industrial) temperature grade (–40°C to +85°C) and is not AEC-Q100 qualified. While the broader 24XX08 family includes AEC-Q100-qualified variants (e.g., 24AA08HT-I/MNY), the 24AA08T-I/MNY is intended for industrial, commercial, and consumer applications where extended temperature or automotive reliability certification is not required.