Diodes Incorporated PI3HDX511EZLSEX

Overview

PI3HDX511EZLSEX from Diodes Incorporated is an ultra-low-power HDMI 1.4b ReDriver and dual-mode level shifter supporting up to 3.4 Gbps per lane, 48-bit DeepColor, and 4K@30fps resolution. It features programmable input equalization (2.5/5/7.5 dB), pre-emphasis control (0/1.5/2.5 dB), integrated DDC level shifting, and 8 kV ESD protection on all I/O pins. It operates from a single 3.3 V supply and draws only 2 µA in standby.

For engineers reviewing the PI3HDX511EZLSEX datasheet, PI3HDX511EZLSEX pinout, PI3HDX511EZLSEX application, or PI3HDX511EZLSEX equivalent, key selection criteria include AC/DC-coupled differential input support, automatic HPD detection for power-state management, squelch-controlled output enable, and compatibility with non-standard HDMI source jitter compliance requirements.

Technical Context

The PI3HDX511EZLSEX functions as a source-side ReDriver in HDMI 1.4b systems, amplifying and reshaping degraded differential signals without retiming-preserving native jitter characteristics while restoring signal integrity. Its three-step equalization and pre-emphasis settings are digitally configurable via pin-strapping or I²C-compatible control logic.

It integrates a DDC level shifter for bidirectional SCL/SDA translation between 3.3 V source and 5 V sink domains, plus HPD detection circuitry that enables autonomous power-state transitions. The device uses internal LDO regulation and supports external capacitor-based filtering (CEXT) for stable VDD rail conditioning.

Key Specifications

Pinout & Package

Package: 32-pin TQFN (ZLS32, 3 mm × 6 mm, 0.5 mm pitch, exposed thermal pad).

Key Features

Applications

Equivalent & Alternatives

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

Compared with PI3HDX511A, the PI3HDX511EZLSEX reduces component count and standby power by integrating DDC level shifting and achieving 2 µA quiescent current; versus TI TDP142, it avoids added latency and power overhead by using ReDriver architecture instead of retiming.

Availability

PI3HDX511EZLSEX is available at Aetrix Electronics and suitable for notebook computers, HDMI dongles, A/V receivers, and HDMI switch boxes requiring stable component supply, full production traceability, and lifecycle continuity.

Supply support for PI3HDX511EZLSEX 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 solutions for consumer, computing, industrial, and communications markets.

The PI3HDX511EZLSEX belongs to Diodes' high-speed interface ReDriver product line, designed specifically to extend HDMI 1.4b reach in space-constrained, battery-sensitive source devices without introducing retimer latency or complexity.

FAQ

What is the function of the CEXT pin?

The CEXT pin connects an external capacitor (typically 10 nF) to ground to stabilize the internal LDO's output voltage and suppress high-frequency noise on the VDD rail. This capacitor ensures clean power delivery to analog signal paths, directly improving jitter performance and HDMI compliance margin at 3.4 Gbps.

Does PI3HDX511EZLSEX support HDMI 2.0 or higher?

No. The PI3HDX511EZLSEX is specified only for HDMI 1.4b operation up to 3.4 Gbps per lane. It does not support HDMI 2.0's 6 Gbps or HDMI 2.1's 12 Gbps data rates, nor does it implement TMDS clock recovery or dynamic HDR metadata handling required for newer standards.

Can the device operate with AC-coupled inputs only?

Yes. The PI3HDX511EZLSEX accepts both AC- and DC-coupled differential inputs. When AC-coupled, internal biasing networks establish proper common-mode voltage; no external bias resistors are needed. DC coupling preserves absolute signal level integrity for systems requiring precise common-mode control.

How is HPD detection implemented without external components?

HPD detection is implemented via an internal comparator monitoring HPD_SRC voltage against a 0.4 V threshold. When HPD_SRC rises above threshold, the device asserts HPD_SINK and initiates automatic squelch release. No pull-up resistors or external logic are required-the entire state machine resides on-die and consumes <1 µA in HPD-wait mode.