Diodes Incorporated PI3HDX12211ZHEX

Overview

PI3HDX12211ZHEX from Diodes Incorporated is a 12 Gbps, 4-channel HDMI 2.1 linear ReDriver IC with programmable equalization, output swing, and flat gain via I²C or pin strapping. It supports four 100-Ω differential CML I/Os, delivers 16 dB gain compensation at 6 GHz, operates from 3.3 V ±0.3 V, and targets signal integrity restoration in high-speed HDMI interconnects between SoC and display interfaces.

For engineers reviewing the PI3HDX12211ZHEX datasheet, PI3HDX12211ZHEX pinout, PI3HDX12211ZHEX application, or PI3HDX12211ZHEX equivalent, key selection criteria include per-channel independent I²C configurability, transparent link training compatibility, 220 mW/channel power dissipation at 1200 mVpp output swing, and industrial temperature range (–40°C to +85°C) support.

Technical Context

The PI3HDX12211ZHEX implements a linear redriver architecture-neither retiming nor protocol-aware-preserving HDMI 2.1 link training, TMDS encoding, and data rate negotiation. Its four independent channels each integrate a 3-bit equalizer, 2-bit output swing control, and 2-bit flat gain control, enabling fine-grained signal integrity tuning pre- and post-amplification.

It features conditional pull-up input termination (50 Ω or Hi-Z), back-current leakage-free (I_OFF) protection on HDMI and I²C pins, and dual I²C operation modes: slave mode for register configuration and master mode for external EEPROM initialization. The device latches pin-strapped settings into its I²C register map.

Key Specifications

Pinout & Package

PI3HDX12211ZHEX is housed in a 42-contact, 9 mm × 3.5 mm Thin Fine-Pitch Quad Flat No-Lead (TQFN) package, designated ZH. The package is lead-free, halogen- and antimony-free ("Green"), and RoHS 3 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar HDMI 2.1 linear redriver applications.

Compared with TI TDP158 and MAX96752, PI3HDX12211ZHEX uniquely balances transparency, per-channel configurability, and low-power linear amplification-making it optimal for cost-sensitive, protocol-faithful HDMI 2.1 extension where retiming adds unnecessary complexity and latency.

Availability

PI3HDX12211ZHEX is available at Aetrix Electronics and suitable for laptop/desktop PC design, gaming console signal routing, and docking station HDMI 2.1 extension requiring stable component supply and long-term production continuity.

Supply support for PI3HDX12211ZHEX 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 integrated circuits, specializing in high-performance analog, logic, and signal integrity solutions for consumer, industrial, and computing markets.

The PI3HDX12211 belongs to Diodes' ReDriver™ family-engineered specifically for high-speed serial interface signal restoration in HDMI, DisplayPort, and USB applications without altering protocol timing or data content.

FAQ

Does PI3HDX12211ZHEX require external clocking or reference signals?

No. The PI3HDX12211ZHEX is a linear redriver and does not require an external clock, PLL, or reference oscillator. It operates transparently on incoming HDMI TMDS data and clock lanes, preserving native timing relationships and eliminating added jitter from clock recovery circuits.

Can PI3HDX12211ZHEX be used with HDMI 2.0 sources or displays?

Yes. The device supports multi-data-rate operation from 3.4 Gbps (HDMI 1.4) up to 12 Gbps (HDMI 2.1). Its programmable equalization and flat gain allow optimization for lower rates, and its transparent architecture ensures full backward compatibility with HDMI 2.0, 1.4, and earlier specifications.

What is the function of the PRSNT# pin?

The PRSNT# pin is an active-low presence detect input used to indicate HDMI connector insertion status. When asserted, it enables internal termination and initiates redriver activation sequence; it supports hot-plug detection in compliance with HDMI specification requirements.

Is I²C communication required to operate PI3HDX12211ZHEX?

No. I²C is optional. All critical functions-including equalization, output swing, and flat gain-can be set via pin strapping (A0–A2, PRSNT#, and dedicated configuration pins). I²C provides dynamic runtime adjustment and EEPROM-based initialization but is not mandatory for basic operation.