Microchip Technology AT24C01D-XHM-T

Overview

AT24C01D-XHM-T from Microchip Technology is a 1-Kbit I²C-compatible serial EEPROM organized as 128 × 8 bits, operating from 1.7V to 3.6V with industrial temperature range (−40°C to +85°C), 1 MHz Fast Mode Plus support at 2.5–3.6V, and hardware write-protection via WP pin - used for nonvolatile parameter storage in embedded control modules, sensor calibration registers, and power-management configuration.

For engineers reviewing the AT24C01D-XHM-T datasheet, AT24C01D-XHM-T pinout, AT24C01D-XHM-T application, or AT24C01D-XHM-T equivalent, this page delivers verified package mapping (8-pad UDFN), confirmed I²C timing compliance (100/400/1000 kHz modes), endurance (1M cycles), data retention (100 years), and real-world noise immunity via Schmitt-trigger inputs and input filtering.

Technical Context

The AT24C01D-XHM-T functions as an I²C slave device with fixed 7-bit address prefix 1010b and three programmable address bits (A0–A2), enabling up to eight devices on one bus. It implements open-drain SDA/SCL interface with integrated spike suppression filters and Schmitt triggers for robust noise immunity in electrically noisy environments.

It supports byte and 8-byte page write modes with self-timed internal write cycle ≤5 ms, random/sequential read, and hardware write protection via dedicated WP pin. Power management includes ultra-low standby current (0.8 μA max) and active current ≤1 mA, optimized for battery-backed and energy-constrained systems.

Key Specifications

Pinout & Package

AT24C01D-XHM-T is packaged in an 8-pad UDFN (2.0 mm × 1.6 mm, 0.5 mm pitch) with wettable flank leads for automated optical inspection. The exposed pad is optional and may be connected to GND or left floating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M24C01-RMN6TP and BR24G01FJ-3GE2, the AT24C01D-XHM-T offers superior noise immunity via Schmitt-trigger inputs and tighter 0.8 μA standby current, making it optimal for compact, battery-sensitive designs using the UDFN footprint - while retaining full I²C protocol compatibility and 1 MHz throughput capability.

Availability

AT24C01D-XHM-T is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and embedded controller boot settings requiring stable component supply, long-lifecycle assurance, and RoHS-compliant green packaging.

Supply support for AT24C01D-XHM-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 devices, and memory solutions, with ISO 9001-certified manufacturing and broad industrial qualification.

The AT24C01D-XHM-T belongs to Microchip's AT24CxxD serial EEPROM family, designed specifically for low-voltage, low-power, noise-immune nonvolatile storage in space-constrained embedded systems.

FAQ

What is the package type and dimensions of the AT24C01D-XHM-T?

The AT24C01D-XHM-T uses an 8-pad UDFN package measuring 2.0 mm × 1.6 mm with 0.5 mm pitch and wettable flank leads. The exposed pad is optional and may be connected to GND or left floating. This compact footprint supports high-density PCB layouts and automated optical inspection in volume manufacturing.

Does the AT24C01D-XHM-T support 1 MHz I²C communication?

Yes, the AT24C01D-XHM-T supports Fast Mode Plus (FM+) at up to 1 MHz, but only when VCC is between 2.5V and 3.6V. At 1.7–2.5V, it operates in Standard (100 kHz) or Fast (400 kHz) mode. This allows high-speed configuration loading in 3.3V systems while maintaining compatibility with lower-voltage domains.

How does the write-protect (WP) pin function on the AT24C01D-XHM-T?

When the WP pin is driven to VCC, the AT24C01D-XHM-T inhibits all write operations to its entire memory array. When tied to GND, normal write access is enabled. If left floating, the internal pull-down asserts WP = LOW, allowing writes - though Microchip recommends hardwiring WP to a known state for reliability.

What is the endurance and data retention specification for the AT24C01D-XHM-T?

The AT24C01D-XHM-T guarantees 1,000,000 write cycles per memory location and 100 years of data retention at 55°C. These specifications are validated through qualification testing and apply across the full industrial temperature range (−40°C to +85°C), ensuring long-term reliability in demanding applications.

Can multiple AT24C01D-XHM-T devices share the same I²C bus?

Yes, up to eight AT24C01D-XHM-T devices can operate on a single I²C bus using hardware address pins A0, A1, and A2. Each device is assigned a unique 7-bit address by hardwiring these pins to GND or VCC, enabling independent read/write access without software arbitration.