Diodes Incorporated PI3HDX414FCEEX

Overview

PI3HDX414 from Diodes Incorporated (acquired Pericom) is an HDMI 1.4b-compliant active 1×4 TMDS splitter with integrated equalization and pre-emphasis, designed for high-bandwidth video routing at up to 3.4 Gbps (340 MHz TMDS clock). It supports 1080p60 and 4K30 resolutions, features pin- or I²C-configurable output swing, slew rate, and 8-step receiver equalization (2.5–20 dB), and delivers Hi-Z outputs to drive four independent HDMI displays from a single source.

For engineers reviewing the PI3HDX414 datasheet, PI3HDX414 pinout, PI3HDX414 application, or PI3HDX414 equivalent, key selection criteria include TMDS data rate support (3.4 Gbps), configurable equalization depth, squelch-mode clock detection, HPD-aware port management, and 3.3 V single-supply operation in LQFP-80 packaging.

Technical Context

The PI3HDX414 implements an active TMDS channel demultiplexer architecture with adaptive signal conditioning: its 8-step programmable receiver equalizer compensates for channel loss across long cables (e.g., 15 m HDMI), while its pre-emphasis circuit enhances edge rates to maintain signal integrity at 3.4 Gbps. All four TMDS output channels are independently controllable for voltage swing and slew rate.

It integrates a built-in clock detector enabling squelch mode for power savings when no valid TMDS clock is present, and supports HPD monitoring per output port to enable dynamic display hot-plug management-critical for PC graphics multi-monitor switching and AV server applications.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (FCE80), RoHS-compliant, 12 mm × 12 mm body, 0.5 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar HDMI 1.4b 1×4 active splitter applications.

Compared with TPD12S016 and MAX9278, the PI3HDX414 uniquely integrates full HDMI 1.4b signal conditioning-including programmable equalization, pre-emphasis, and HPD management-in a native 1×4 TMDS topology, eliminating external redrivers and protocol translation overhead for direct HDMI distribution.

Availability

PI3HDX414 is available at Aetrix Electronics and suitable for PC graphics multi-display hubs, AV server video distribution systems, 4K home theater switching matrices, and HDMI compliance test fixtures requiring stable component supply and long-cable signal integrity.

Supply support for PI3HDX414 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

Diodes Incorporated acquired Pericom Semiconductor in 2017, expanding its interface and signal-integrity portfolio with high-speed HDMI, USB, and PCIe solutions.

The PI3HDX414 belongs to Diodes' HDMI signal-conditioning product line, engineered specifically for robust, long-cable HDMI 1.4b distribution in consumer and professional AV equipment.

FAQ

What is the maximum supported HDMI resolution and refresh rate?

The PI3HDX414 supports up to 4K resolution (3840×2160) at 30 Hz and full 1080p (1920×1080) at 60 Hz, compliant with HDMI 1.4b specifications. Its 3.4 Gbps TMDS data rate and 340 MHz clock frequency are validated for these resolutions using standard HDMI cables up to 15 meters with enabled equalization.

Does the PI3HDX414 require external termination resistors?

No. The PI3HDX414 integrates 50 Ω differential termination on all TMDS inputs and outputs, eliminating the need for external resistors. This simplifies PCB layout and ensures consistent impedance matching across all four output channels without additional components.

How does squelch mode reduce power consumption?

Squelch mode disables internal TMDS drivers and analog front-end circuitry when the built-in clock detector senses no valid TMDS clock signal for >100 ms. This reduces quiescent current from typical 180 mA to <25 mA, cutting idle power by over 86% without affecting wake-up latency or signal integrity on reactivation.

Can HPD signals be monitored while the device is in squelch mode?

Yes. HPD inputs (HPD1–HPD4) remain fully functional and actively monitored during squelch mode. The device continues to detect hot-plug events and update internal status registers, enabling immediate TMDS reactivation upon display connection-even while in low-power state.