Diodes Incorporated PI3HDX511FZLCEX

Overview

PI3HDX511FZLCEX from Diodes Incorporated is an ultra-low-power HDMI 1.4b ReDriver and dual-mode DisplayPort++ level shifter supporting up to 3.4 Gbps per lane (340 MHz pixel clock), 48-bit deep color, and sink-side TMDS pin-swapping. It delivers 2 µA standby current, 6-step input equalization (2.5/5/7.5 dB or 5/10/15 dB), and selectable DDC passive switch or active buffer modes for notebook, monitor, and A/V receiver applications.

For engineers reviewing the PI3HDX511FZLCEX datasheet, PI3HDX511FZLCEX pinout, PI3HDX511FZLCEX application, or PI3HDX511FZLCEX equivalent, this device is selected for HDMI/DP++ signal integrity restoration in space-constrained mobile and embedded systems requiring low-power operation, flexible power supply (3.3 V single or 3.3/1.5 V dual), and robust ESD protection (8 kV HBM).

Technical Context

The PI3HDX511FZLCEX integrates a 4-channel TMDS ReDriver with independent input EQ control (via EQ_STEP and EQ_S0), pre-emphasis (0/1.5/2.5 dB), and output termination selection (open-drain or double-terminated via ROUT_S0). Its dual-mode DP++ level shifting supports both HDMI and DisplayPort source/sink topologies with VBIAS-controlled input termination voltage.

It implements automatic squelch detection based on TMDS clock presence, HPD-driven output disable, and LDO bypass capability via LDO_EN. The DDC interface supports bidirectional passive switching or active buffering across source (SCL_SRC/SDA_SRC) and sink (SCL_SINK/SDA_SINK) sides, with 5 V-tolerant I/O pins.

Key Specifications

Pinout & Package

PI3HDX511FZLCEX uses a 40-pin, 3 mm × 6 mm TQFN package (ZLC code) with exposed thermal pad. Pin functions are validated per Diodes DS40011 Rev 5-2, including dedicated TMDS input/output pairs, DDC I/O channels, HPD control, and configuration pins for EQ, pre-emphasis, termination mode, and power supply selection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar HDMI/DP++ ReDriver applications.

Compared with PI3HDX511E and PI3HDX511D, the PI3HDX511FZLCEX uniquely combines LDO bypass, sink-side HPD control, TMDS pin swapping, and 2 µA standby - making it the only option for battery-powered, dual-role (source/sink), and space-constrained HDMI/DP++ interface extension.

Availability

PI3HDX511FZLCEX is available at Aetrix Electronics and suitable for notebook PCs, A/V receivers, all-in-one desktop monitors, and set-top boxes requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.

Supply support for PI3HDX511FZLCEX 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 is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-performance signal integrity, power management, and interface solutions for consumer, computing, and industrial markets.

The PI3HDX511F belongs to Diodes' ReDriver™ product line, engineered specifically for HDMI 1.4b and DP++ signal restoration in mobile and embedded platforms where ultra-low power, small form factor, and dual-standard interoperability are critical design requirements.

FAQ

What is the maximum supported pixel clock frequency for PI3HDX511FZLCEX?

The PI3HDX511FZLCEX supports up to 340 MHz pixel clock, corresponding to HDMI 1.4b's 3.4 Gbps per-lane data rate. This enables full 4K2K (3840×2160@30Hz), 1080p60, and 48-bit deep color transmission with verified eye opening per DS40011 Rev 5-2 test reports.

How does the LDO bypass function operate on PI3HDX511FZLCEX?

LDO bypass is enabled by driving LDO_EN low, configuring CEXT/VDD15 as a 1.5 V core supply input. When LDO_EN is high, the same pin serves as CEXT for an external 2.2–4.7 µF capacitor to stabilize the internal LDO. This reduces system power conversion losses and heat generation in battery-powered devices.

Can PI3HDX511FZLCEX be used in both source and sink configurations?

Yes - it supports both roles. As a sink (receptacle), it accepts TMDS inputs with pin-swapping (TMDS_ORDER), high-EQ settings (up to 15 dB), and HPD_SINK monitoring. As a source (transmitter), it drives TMDS outputs with pre-emphasis and ROUT_S0-controlled termination, plus HPDO_S0 HPD signaling to downstream devices.

What DDC voltage levels does PI3HDX511FZLCEX support on its SDA/SCL pins?

The PI3HDX511FZLCEX supports 1.8–3.3 V DDC operation via selectable DDC_SEL mode. In active buffer mode (DDC_SEL = 0), it translates between source-side (SCL_SRC/SDA_SRC) and sink-side (SCL_SINK/SDA_SINK) voltages. All DDC pins are 5 V tolerant, allowing direct connection to legacy 5 V DDC buses without external clamping.