Diodes Incorporated PI3HDX511DZLEX

Overview

PI3HDX511DZLEX from Diodes Incorporated is a low-power HDMI 1.4b redriver with DisplayPort dual-mode level shifting, supporting 3.4 Gbps per lane (340 MHz pixel clock), 48-bit-per-pixel Deep Color, and automatic HPD-squelch for ultra-mobile source-side applications. It operates from a single 3.3 V supply, delivers six-step equalization (2.5/5/7.5 dB), and integrates DDC level shifting and 8 kV ESD protection.

For engineers reviewing the PI3HDX511DZLEX datasheet, PI3HDX511DZLEX pinout, PI3HDX511DZLEX application, or PI3HDX511DZLEX equivalent, key selection criteria include per-lane data rate compliance, integrated DDC level shift capability, standby current (<1 mA), equalization/pre-emphasis granularity, and QFN-30 2.5 × 4.5 mm package constraints in space-constrained HDMI source designs.

Technical Context

The PI3HDX511DZLEX implements a two-channel differential redriver architecture with independent equalization and pre-emphasis control per channel. It supports AC- or DC-coupled differential inputs and converts low-swing signals to full-amplitude HDMI-compatible outputs while maintaining signal integrity up to 3.4 Gbps.

Its integrated HPD detection block and automatic output squelch activate during no-signal conditions to reduce power consumption. The DDC switch includes bidirectional level shifting between 3.3 V (source) and 5 V (sink) domains, enabling interoperability without external translators.

Key Specifications

Pinout & Package

Package: 30-pin QFN (ZL30), 2.5 mm × 4.5 mm, 0.4 mm pitch, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar HDMI redriver with DP dual-mode level shifting applications.

Compared with TI TDP142RSBR and MAX9278, PI3HDX511DZLEX uniquely combines HDMI 1.4b redriving, DP dual-mode level shifting, integrated DDC translation, and sub-1 mA standby in a 2.5 × 4.5 mm package-making it the only viable option for space- and power-constrained ultra-mobile HDMI source designs.

Availability

PI3HDX511DZLEX is available at Aetrix Electronics and suitable for ultra-mobile HDMI source interfaces, notebook computer port expansion, USB-C Alt Mode adapters, and embedded display controller interconnects requiring stable component supply and lifecycle continuity.

Supply support for PI3HDX511DZLEX 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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.

The PI3HDX511DZLEX belongs to Diodes' high-speed interface redriver product line, engineered specifically for HDMI/DisplayPort signal restoration in battery-powered, space-constrained portable electronics.

FAQ

What is the maximum supported HDMI pixel clock frequency for PI3HDX511DZLEX?

The device supports up to 340 MHz pixel clock, corresponding to HDMI 1.4b 4K Ultra HD (3840×2160@30Hz) and 1080p60 with 48-bit Deep Color. This is validated per TMDS specification at 3.4 Gbps per lane with measured eye diagram compliance per HDMI Compliance Test Specification v1.4b.

Does PI3HDX511DZLEX require external components for DDC level shifting?

No. The device integrates bidirectional 3.3 V ↔ 5 V DDC level shifting on SCL_SINK/SDA_SINK and SCL_SRC/SDA_SRC pins. No external MOSFETs, resistors, or pull-ups are needed-only standard 3.3 V and 5 V DDC bus terminations per HDMI specification.

How does the automatic squelch function respond to HPD state changes?

When HPD_SINK deasserts (low), the internal logic disables all TMDS output drivers within 100 µs, reducing dynamic current to <100 µA. Upon HPD reassertion, outputs re-enable with full equalization applied; no host intervention or register programming is required.

Can PI3HDX511DZLEX operate with AC-coupled differential inputs?

Yes. The input receivers accept both AC-coupled (via 100 nF series capacitors) and DC-coupled differential signals. Internal common-mode biasing ensures proper operation across process/voltage/temperature corners without external bias networks.