Diodes Incorporated PI3VDP1431ZLSEX

Overview

PI3VDP1431ZLSEX from Pericom is a low-power dual-mode DisplayPort 3.4 Gbps level shifter and redriver IC with integrated DDC switch, designed for HDMI/DisplayPort signal bridging in mobile and desktop platforms. It supports 4K Ultra HD, 3D video (1080p/i, 720p), and 48-bit Deep Color, operates on a single 3.3 V supply, and delivers <50 µA standby current with HPD-driven power management.

For engineers reviewing the PI3VDP1431ZLSEX datasheet, PI3VDP1431ZLSEX pinout, PI3VDP1431ZLSEX application, or PI3VDP1431ZLSEX equivalent, key selection criteria include its 3.4 Gbps per-lane redriving capability, programmable 2.5/5/7.5 dB input equalization, 0/1.5/2.5 dB pre-emphasis, automatic squelch, and 32-pin TQFN (3×6 mm) package with integrated ESD protection (±4 kV contact).

Technical Context

The PI3VDP1431ZLSEX implements a dual-channel TMDS redriver architecture with independent equalization (EQ_S0) and pre-emphasis (OC_S0) control per lane, plus dedicated clock channel conditioning. Its internal LDO (CEXT pin) supplies core logic while supporting AC- or DC-coupled differential inputs via 50 Ω pull-down termination (RT) on all IN_ pins.

It integrates a passive DDC switch (not buffer) with ≤50 Ω R_ON, 10 pF I/O capacitance, and 1.5–2.5 V pass-through voltage - enabling bidirectional I²C-level shifting between 5 V sink and 3.3 V source domains without external level shifters. HPD_SRC and HPD_SINK pins provide hot-plug detection with open-drain output and internal 120 kΩ pull-down.

Key Specifications

Pinout & Package

PI3VDP1431ZLSEX is housed in a 32-pin TQFN (ZLS32) package measuring 3 mm × 6 mm with 0.5 mm pitch and exposed thermal pad. The package supports reflow soldering per JEDEC J-STD-020 and provides low-inductance ground path via multiple GND pins (pins 14, 31, 32).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-mode DisplayPort level shifter/redriver applications.

Compared with PI3VDP1431AZLSEX, the ZLSEX variant offers lower system cost and simpler DDC implementation for standard HDMI sinks, while PI3HDX1204-B enables future-proof 6 Gbps operation at the expense of layout redesign and higher power consumption (120 mA typical vs. 100 mA).

Availability

PI3VDP1431ZLSEX is available at Aetrix Electronics and suitable for notebook display interfaces, desktop GPU-to-monitor links, and USB-C docking stations requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PI3VDP1431ZLSEX 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

Pericom Semiconductor (now part of Diodes Incorporated) is a fabless provider of high-speed signal integrity solutions, specializing in interface, timing, and connectivity ICs for consumer, computing, and communications markets.

The PI3VDP1431 product line targets mobile and desktop video interface bridging, delivering low-power, pin-compatible DisplayPort-to-HDMI redrivers with integrated DDC and HPD management for seamless dual-mode operation.

FAQ

What is the function of the CEXT pin?

The CEXT pin is the output of an internal LDO that powers the device's core logic. It must be connected to a 2.2–4.7 µF ceramic capacitor to ground to stabilize the LDO and ensure proper redriver operation. Failure to install this capacitor causes excessive jitter and intermittent lock loss at 3.4 Gbps.

Can PI3VDP1431ZLSEX be used with HDMI 2.0 sources?

No - PI3VDP1431ZLSEX is rated for 3.4 Gbps per lane (HDMI 1.4b / DP 1.1a), not the 6 Gbps required for HDMI 2.0. Attempting to use it with HDMI 2.0 sources results in severe jitter accumulation, eye closure, and link training failure. For HDMI 2.0, consider PI3HDX1204-B instead.

How does the automatic squelch feature work?

Automatic squelch monitors the TMDS clock input (IN_CLK±); when differential voltage falls below threshold for >100 µs, the device disables all TMDS outputs and enters low-current state (<5 µA). Outputs resume within 50 µs after valid clock reappears - enabling zero-latency wake from display sleep without host intervention.

Is external termination required on TMDS outputs?

No - the device integrates 50 Ω output termination (ROUT=50 Ω) activated when ROUT_S0 = "1". When ROUT_S0 = "0", outputs operate in open-drain mode requiring external 50 Ω pull-downs to VDD. Default configuration uses internal termination, eliminating four external resistors and reducing layout complexity.