Microchip Technology 24AA01T-I/MNY

Overview

24AA01T-I/MNY from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory with hardware write-protection, 400 kHz max clock frequency at 2.5–5.5 V, and industrial temperature range (−40°C to +85°C). It supports page writes up to 8 bytes, operates down to 1.7 V, and delivers ≤1 µA standby current - ideal for low-power embedded system configuration storage.

For engineers reviewing the 24AA01T-I/MNY datasheet, 24AA01T-I/MNY pinout, 24AA01T-I/MNY application, or 24AA01T-I/MNY equivalent, key selection considerations include its 1.7–5.5 V supply range, I²C bus compatibility (including Schmitt-trigger inputs and slope control), 8-byte page buffer, hardware WP pin functionality, and MNY package-specific footprint and thermal characteristics.

Technical Context

The 24AA01T-I/MNY implements a standard two-wire I²C interface with fixed 7-bit client address (1010xxx) and R/W bit control. Its internal architecture includes an 8-byte page latch, EEPROM array, HV generator for programming, and memory control logic that manages self-timed erase/write cycles without external timing constraints.

It uses open-drain SDA/SCL with integrated Schmitt triggers and output slope control to suppress noise and eliminate ground bounce. Write protection is implemented via dedicated WP pin tied to VCC (full-array lock) or VSS (enabled), and A0–A2 pins are unconnected - no address selection capability.

Key Specifications

Pinout & Package

24AA01T-I/MNY is supplied in an 8-lead DFN (2 mm × 3 mm, 0.5 mm pitch) package with exposed pad. Pin 1 is top-left corner (A0), and the exposed pad is electrically connected to VSS per Microchip's recommended layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC01B-I/MNY, the 24AA01T-I/MNY adds 1.7 V operation for broader supply compatibility; compared with 24FC01T-I/MNY, it trades maximum speed for proven stability at 400 kHz in noise-sensitive environments - making it optimal for cost-sensitive, low-power industrial designs.

Availability

24AA01T-I/MNY is available at Aetrix Electronics and suitable for smart sensor calibration storage, IoT device identity management, and automotive body control module settings requiring stable component supply across extended production lifecycles.

Supply support for 24AA01T-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 microcontrollers, analog, FPGA, and memory solutions, serving industrial, automotive, communications, and consumer markets with vertically integrated silicon and development tools.

The 24AA01T-I/MNY belongs to Microchip's legacy 24XX01 family of I²C EEPROMs, designed specifically for reliable, low-power, pin-efficient nonvolatile storage in space-constrained embedded systems.

FAQ

What is the maximum I²C clock frequency supported by the 24AA01T-I/MNY?

The 24AA01T-I/MNY supports up to 400 kHz when V_CC is 2.5 V or higher. At V_CC between 1.7 V and 2.5 V, the maximum clock frequency is reduced to 100 kHz to ensure reliable timing margins. This dual-speed capability allows interoperability across diverse voltage domains without protocol changes.

Does the 24AA01T-I/MNY require external pull-up resistors on SDA and SCL lines?

Yes, the 24AA01T-I/MNY requires external pull-up resistors on both SDA and SCL because it uses open-drain outputs. Typical values are 10 kΩ for 100 kHz operation and 2 kΩ for 400 kHz. The exact value depends on bus capacitance and desired rise time, as specified in the I²C bus standard.

How does the WP pin function on the 24AA01T-I/MNY?

On the 24AA01T-I/MNY, the WP pin is a logic-level input: tying it to VCC disables all write operations (full-array write protection), while tying it to VSS enables normal read/write access. No internal pull-up or pull-down is present, so the pin must be actively driven to a valid logic level for predictable behavior.

What is the memory organization of the 24AA01T-I/MNY?

The 24AA01T-I/MNY contains 1 Kbit of EEPROM memory organized as 128 words × 8 bits (128 bytes), addressed using 7-bit word addresses (A6–A0). There are no block or page select bits - the entire array is accessible via linear addressing from 0x00 to 0x7F.

Is the 24AA01T-I/MNY RoHS compliant and AEC-Q100 qualified?

Yes, the 24AA01T-I/MNY is RoHS compliant and AEC-Q100 qualified for automotive applications. Its industrial temperature rating (−40°C to +85°C) and qualification status make it suitable for under-hood and cabin electronics where reliability and environmental robustness are mandatory.