Diodes Incorporated PI2DPT1021XEAEX

Overview

PI2DPT1021XEAEX from Diodes Incorporated is a bidirectional, bit-level DisplayPort Alt Mode ReTimer IC for USB Type-C systems, supporting DP1.4 (10 Gbps/lane) and USB3.2 Gen2 (10 Gbps) with -23 dB channel loss compensation at 5 GHz, <1 ns latency, and programmable lane configuration (4-lane DP, 2-lane DP/USB, or dual USB3.2 Gen2) via I²C. It integrates adaptive CTLE, 3-tap TX equalization, AUX/SBU crossbar switching, and USB link power state compliance (U0–U3).

For engineers reviewing the PI2DPT1021XEAEX datasheet, PI2DPT1021XEAEX pinout, PI2DPT1021XEAEX application, or PI2DPT1021XEAEX equivalent, key selection considerations include bidirectional signal flow support, DP ALT mode AUX listener functionality, I²C-configurable lane mapping, 1.8 V single-supply operation, and integrated SBU/AUX routing for Type-C flip/non-flip plug compatibility.

Technical Context

The PI2DPT1021XEAEX implements a fully bidirectional retiming architecture with independent RX adaptive CTLE and TX 3-tap FIR equalization per lane, enabling real-time compensation of asymmetric channel loss in active cables and docking solutions. Its AUX Listener monitors AUX channel traffic to auto-detect DP data rate, lane count, swing/pre-emphasis, and D3 power-down requests.

USB Rx detection continuously monitors TX terminal plug status, while LFPS-based PWM message (LBPM) detection enables USB mode handshaking. The integrated AUX/SBU crossbar switch dynamically maps DP AUX± to Type-C SBU1/SBU2 pins, supporting both DFP-to-UFP and UFP-to-DFP signal flow without hardware reconfiguration.

Key Specifications

Pinout & Package

PI2DPT1021XEAEX is housed in a 32-pin X1-QFN2845-32 package (2.85 mm × 4.5 mm, 0.4 mm pitch, 0.45 mm height), thermally enhanced with exposed thermal pad. Pin functions are validated per Diodes DS43234 Rev 5-2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional DP Alt Mode ReTimer applications.

Compared with TUSB1146 and PS8818, PI2DPT1021XEAEX uniquely integrates bidirectional retiming, USB3.2 Gen2 + DP1.4 co-processing, and autonomous AUX/SBU routing - reducing component count by up to two ICs in USB-C active cable and dock reference designs.

Availability

PI2DPT1021XEAEX is available at Aetrix Electronics and suitable for USB-C active cables, DP Alt Mode docking stations, notebook internal display interfaces, and compact dongles requiring stable component supply, consistent lead times, and long-term lifecycle support.

Supply support for PI2DPT1021XEAEX 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 connectivity solutions for consumer, computing, and industrial markets.

The PI2DPT1021 belongs to Diodes' USB-C Connectivity & Signal Integrity product line, engineered specifically for low-latency, protocol-aware retiming in bidirectional Type-C ecosystems where DP Alt Mode and USB3.2 Gen2 coexist on shared physical lanes.

FAQ

Does PI2DPT1021XEAEX support USB-C plug flip detection and automatic SBU routing?

Yes. The device integrates hardware-level CC logic interpretation and automatically configures the internal AUX/SBU crossbar switch to route DP AUX± signals to the correct SBU1/SBU2 pins based on plug orientation. This eliminates manual PCB routing decisions and ensures reliable operation in both flip and non-flip configurations without firmware involvement.

Can PI2DPT1021XEAEX operate in USB-only mode without DP functionality enabled?

Yes. Via I²C register configuration, the device can be set to 2-lane USB3.2 Gen2 x1 or x2 mode only, disabling DP lane drivers and AUX monitoring. In this state, it performs full USB retiming with adaptive CTLE and TX equalization, maintains U1–U3 power state compliance, and retains USB Rx termination detection for automatic power-down.

What is the thermal pad connection requirement for the XEA package?

The exposed thermal pad on the X1-QFN2845-32 (XEA) package must be soldered to a solid copper thermal land on the PCB, connected to the VSS plane through ≥4 thermal vias (0.3 mm diameter, spaced ≤1 mm apart). Diodes DS43234 specifies minimum 120 mm² copper area for continuous 10 Gbps operation at 85°C ambient.

How does the AUX Listener function impact DP power management?

The AUX Listener continuously monitors AUX channel traffic to detect D3 power-down requests, lane count changes, and voltage swing adjustments from the sink. Upon detecting a D3 request, it triggers internal power gating of unused lanes and asserts status to the system PD controller via I²C - enabling coordinated low-power states without host CPU intervention.