PI3HDX621FBEX

Specialized Overview

The PI3HDX621FBEX is an active HDMI 1.4b compliant 2:1 switch designed for sink-side applications, manufactured by Diodes Incorporated in a 48-contact LQFP (FB48) package. It supports data rates up to 3.4 Gbps per lane and accommodates Deep Color with up to 48 bits per pixel. The device features programmable equalization, emphasis, and amplitude settings to optimize TMDS signal integrity. It integrates ARC drivers, DDC multiplexing, and ESD protection rated at 8 kV contact per IEC61000-4-2 level 4. Operating on a single 3.3 V supply, it functions within an industrial temperature range of -40 °C to +85 °C.

Specialized Feature Summary

• Active redriver functionality boosts input signal quality and restores integrity at the receiver through built-in high-speed multiplexing.
• Integrated Audio Return Channel (ARC) drivers and DDC 2:1 multiplexer simplify system design for sink-side implementations.
• Configurable output termination modes allow selection between double termination and open drain configurations via hardware pins.
• Idle clock detection enables automatic output squelch and standby modes to reduce power dissipation when no signal is present.

Specialized Applications

• Notebook Computers
• Set Top Box
• A/V Home Entertainment Systems
• Dongle and Switches

Specialized Procurement Notes

Verify the specific ordering suffix against official documentation before procurement. The 'E' suffix indicates Pb-free and Green packaging compliance. Confirm that the FB48 package variant matches the required footprint. Ensure the component meets RoHS3 standards if applicable to the target assembly process. Cross-reference the manufacturer part number with authorized distributor listings to confirm current availability status.

Specialized Selection Notes

Select this component for sink-side HDMI applications requiring fast switching between two TMDS input ports. It is suitable for designs needing integrated ARC support without external transceivers. Consider the 3.3 V single supply requirement and industrial temperature range for environmental compatibility. Verify that the 48-pin LQFP package fits the PCB layout constraints. Evaluate the need for programmable equalization and pre-emphasis to address specific channel loss scenarios.

Specialized Part Context

This component belongs to the PI3HDX series of active HDMI switches from Diodes Incorporated, formerly Pericom Semiconductor. It serves as a direct successor or alternative to legacy models like the PI3HDMI621FBE, which has been marked as obsolete. The PI3HDX621FBEX maintains HDMI 1.4b compliance while offering enhanced signal conditioning capabilities compared to passive switches.

Specialized Replacement Considerations

The PI3HDMI621FBE is listed as an obsolete direct replacement for this model. Verify pinout and functional compatibility before substituting. No other cross-model substitutes are confirmed in the provided documentation.

Specialized FAQ

How does the HPD_SINK pin affect the TMDS outputs?

When the HPD_SINK pin is floating or tied to GND, the TMDS outputs shut down to sleep mode. This pin does not control the DDC channel.

What are the selectable output termination modes?

The ROUT_S0 pin allows selection between double termination (logic '1' or NC) and open drain output (logic '0').

Is the PI3HDX621 compatible with DC-coupled inputs?

Yes, each input can be AC coupled or DC coupled, while the output maintains TMDS compliant DC coupled, current steering signals.