FXMHD103UMX

Specialized Overview

The FXMHD103UMX is a reduced-pin-count, low-power HDMI voltage translator designed for DDC, CEC, and HPD control lines. It features three non-inverting bi-directional translation circuits with a host-side supply (VCCA) of 1.6V to 3.6V and an HDMI port supply (VCCC) of 4.8V to 5.3V. The device includes integrated DDC edge rate accelerators supporting up to 800pF loads and internal pull-ups (1.75kΩ on SCL/SDA_C, 27kΩ on CEC_C). It provides back-drive protection, non-preferential power sequencing, and ESD ratings of 8kV HBM and 2kV CDM. Operating temperature ranges from -40°C to 85°C in a 12-terminal Quad µMLP package.

Specialized Feature Summary

• Supports DDC, CEC, and HPD level shifting without requiring a direction pin.
• Includes integrated I2C edge rate accelerators for long HDMI cable support.
• Provides back-drive protection and non-preferential power-up/down sequencing.
• Features pin-out tailored for PCB trace routing to HDMI Type D connectors.

Specialized Applications

• Smart Phones
• Multimedia Phones
• Digital Camcorders
• Notebooks
• PC and Consumer Electronics

Specialized Procurement Notes

Verify the specific ordering suffix 'UMX' corresponds to the 5000-unit tape and reel packing method. Confirm the component is sourced from authorized ON Semiconductor or Fairchild distribution channels to ensure authenticity. Check for RoHS compliance status as the original manufacturer was Fairchild before integration into ON Semiconductor. Validate that the package matches the 12-terminal Quad µMLP specification.

Specialized Selection Notes

Select this component when interfacing 1.6V–3.6V host controllers with 5V HDMI sinks for control lines only. Ensure the application requires support for DDC clock stretching and high capacitive loads up to 800pF. Verify that the system design accommodates the specific 1.8mm x 1.8mm Quad µMLP footprint. Consider the device's ability to handle non-preferential power sequencing between VCCA and VCCC rails.

Specialized Part Context

Originally manufactured by Fairchild Semiconductor, this part is now part of the ON Semiconductor portfolio following their acquisition. The datasheet revision indicates it is a specialized interface IC for HDMI control protocols. It serves as a bridge for low-voltage mobile processors connecting to standard HDMI connectors.

Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult ON Semiconductor for current equivalent products within the HDMI translator family.

Specialized FAQ

How does the FXMHD103 handle DDC clock stretching?

The device supports DDC (I2C) clock stretching due to its hybrid architecture using Npassgates and dynamic drivers, which allows efficient direction changes during protocol events like ACK bits or arbitration.

What is the function of the OE pin?

The OE (Output Enable) pin controls the state of the DDC, CEC, and HPD paths. When LOW, all paths are disabled. When HIGH, the HPD path is enabled immediately, and DDC/CEC paths enable upon detection of a HIGH signal on HPD_C.

Does the FXMHD103 provide back-drive protection?

Yes, back-drive protection is provided on all pins facing the HDMI connector, including VCCC, SCL_C, SDA_C, CEC_C, and HPD_C, limiting back-drive current to a maximum of 5µA (1.8µA for CEC_C).