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Diodes Incorporated PI3DPX8121AZLEX
- Part No.:
- PI3DPX8121AZLEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Signal Buffers, Repeaters, Splitters
- Package:
- 60-WFQFN Exposed Pad
- Datasheet:
-
PI3DPX8121AZLEX.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:3,500
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Product details
Overview
PI3DPX8121AZLEX from Diodes Incorporated is a 2:1 active DisplayPort mux ReDriver IC supporting 4-lane DP2.1 at 13.5Gbps per lane, with LTTPR-compliant linear Redriver architecture, +10.2dB CTLE equalization at 6.75GHz, and quad-level pin-strapped gain/flat-gain/output swing control for eDP1.5/DP1.4/DP2.1 channel loss compensation in laptop docking systems.
For engineers reviewing the PI3DPX8121AZLEX datasheet, PI3DPX8121AZLEX pinout, PI3DPX8121AZLEX application, or PI3DPX8121AZLEX equivalent, key selection criteria include DP2.1 UHBR13.5 signal integrity support, LT-Tunable ReDriver data path compliance, 3.3V single-supply operation, −40°C to +85°C industrial temperature range, and TQFN-60 (5×9mm) package thermal performance.
Technical Context
The PI3DPX8121A implements a Link Training Transparent PHY Repeater (LTTPR) Redriver data path with tunable pre-shoot and de-emphasis waveform transmission, enabling end-to-end channel optimization between source and sink during link training. Its CTLE equalizers operate at input stages with programmable bandwidth and gain profiles.
Quad-level pin-strapping configures four discrete equalizer gain settings (+10.2/+7.6/+5.0/+2.4dB), flat gain levels, and output swing linearity modes-enabling precise eye diagram opening without I²C or SPI interface overhead. All functions operate from a single 3.3V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 13.5Gbps per lane (UHBR13.5), supports DP2.1, DP1.4, eDP1.5 |
| Equalizer Gain | +10.2dB max at 6.75GHz for DP2.1 channel loss compensation |
| CTLE Architecture | Input-stage continuous-time linear equalizer with tunable frequency response |
| Power Supply | Single 3.3V rail; no auxiliary voltage required |
| Operating Temp | −40°C to +85°C; qualified for industrial system integration |
| Package | 60-pin TQFN (5×9mm, ZL code); exposed thermal pad for PCB heat dissipation |
Pinout & Package
60-pin TQFN (5×9mm, ZL code) with 0.4mm pitch and exposed thermal pad. Package supports high-speed DP signal routing with controlled impedance trace compatibility and low-inductance ground return paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AUXP_A / AUXN_A | DisplayPort AUX CH A differential pair | Carries bidirectional sideband communication for Source A; routed through internal mux |
| AUXP_B / AUXN_B | DisplayPort AUX CH B differential pair | Carries bidirectional sideband communication for Source B; selected via SEL pin logic |
| HPD_A / HPD_B | Hot Plug Detect inputs | Monitors display connection status per source; enables automatic source arbitration |
| SEL0–SEL1 | Mux select control inputs | 2-bit logic selects between Source A or B; determines active DP lane path |
| EQ0–EQ3 | Equalizer gain strap inputs | 4-bit combinational logic sets CTLE gain level (0–3) and flat gain mode |
Key Features
| Feature | Design Value |
|---|---|
| LT-Tunable Redriver Data Path | Preserves LTTPR-compliant pre-shoot/de-emphasis waveforms across mux boundary for full link training transparency |
| Quad-Level Pin-Strap EQ Control | Four discrete CTLE gain settings (+10.2/+7.6/+5.0/+2.4dB) configured without serial interface |
| Flat Gain & Output Swing Linearity Tuning | Independent pin-strapped adjustment of DC gain and AC linearity to maximize eye height/width |
| Single 3.3V Supply Operation | Eliminates need for dual-rail power design; reduces BOM count and layout complexity |
Applications
| Laptop Docking Stations | Desktop Multi-Source Switching |
|---|---|
Use Scenario: Dual-DisplayPort source switching in USB-C dock with independent AUX/HPD routing. IC Role / Device Role / Timing Role: 2:1 active mux Redriver ensuring signal integrity across variable-length PCB traces and cable assemblies. Use Value: Maintains UHBR13.5 eye margin (>12mVppd) after 15cm FR4 trace + 2m passive cable with <0.5UI jitter accumulation. | Use Scenario: KVM switch supporting simultaneous DP1.4 and DP2.1 sources feeding a single monitor. IC Role / Device Role / Timing Role: Lane-level signal regeneration with source-agnostic LTTPR transparency for seamless link training handoff. Use Value: Enables reliable hot-plug detection and AUX channel passthrough without firmware intervention or protocol translation. |
| Workstation GPU Output Multiplexing | Embedded Display Interface Hub |
Use Scenario: High-performance workstation with dual GPUs sharing one DP2.1 output port. IC Role / Device Role / Timing Role: Active mux with integrated CTLE equalization compensating GPU-to-mux insertion loss up to 18dB @6.75GHz. Use Value: Delivers >14dB channel loss compensation while preserving DP AUX timing spec (±50ns edge alignment). | Use Scenario: Industrial panel PC with configurable DP input selection from CPU or external media player. IC Role / Device Role / Timing Role: Low-latency 2:1 mux with pin-strapped EQ tuning for varying interconnect topologies. Use Value: Supports field-configurable equalization without reprogramming; eliminates need for EEPROM or host MCU coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DisplayPort 2.1 ReDriver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TUSB546A | Single-source 4-lane Redriver only; no 2:1 mux function; supports DP2.1 but lacks LTTPR transparency | Requires external analog mux for source selection; adds insertion loss and timing skew | Choose when only Redriver functionality is needed and source switching is handled upstream |
| Parade PS8421-A | 2:1 mux with integrated Redriver but limited to DP1.4 (8.1Gbps); no UHBR10/UHBR13.5 support | Cannot meet DP2.1 UHBR13.5 channel loss budgets beyond 10cm FR4 | Choose for cost-sensitive DP1.4-only designs where future-proofing to DP2.1 is not required |
Compared with TUSB546A and PS8421-A, the PI3DPX8121AZLEX uniquely integrates 2:1 muxing and LTTPR-transparent Redriver functionality at full DP2.1 UHBR13.5 rates, eliminating external signal routing components while maintaining link training fidelity across source transitions.
Availability
PI3DPX8121AZLEX is available at Aetrix Electronics and suitable for laptop docking stations, desktop KVM switches, and workstation GPU multiplexing requiring stable component supply and DP2.1 signal integrity assurance.
Supply support for PI3DPX8121AZLEX 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 industrial, computing, and consumer markets.
The PI3DPX8121A belongs to Diodes' high-speed interface product line, engineered specifically for DisplayPort 2.1 system-level signal integrity in space-constrained, thermally demanding applications like thin-client docks and multi-GPU workstations.
FAQ
What is the maximum supported DisplayPort version and data rate?
The PI3DPX8121AZLEX supports DisplayPort 2.1 at UHBR13.5 (13.5Gbps per lane) across all four lanes, with full backward compatibility to DP1.4 (8.1Gbps) and eDP1.5. It maintains signal integrity through CTLE equalization up to 6.75GHz and preserves LTTPR transparency for end-to-end link training.
Does this device require an I²C or SPI interface for configuration?
No. The PI3DPX8121AZLEX uses quad-level pin-strapping (EQ0–EQ3, FG0–FG1) for equalizer gain, flat gain, and output swing linearity selection. No serial interface is needed, simplifying layout and eliminating firmware dependencies during power-up or hot-plug events.
How does the LT-Tunable capability differ from standard Redriver operation?
The LT-Tunable design ensures pre-shoot and de-emphasis waveforms generated during DisplayPort link training pass unchanged through the device. Unlike non-LTTPR Redrivers, it does not alter or regenerate these training signals-enabling full transparency to both source and sink during channel equalization negotiation.
What thermal management provisions exist for the TQFN-60 package?
The ZL-code 60-pin TQFN (5×9mm) features an exposed thermal pad soldered directly to a dedicated PCB copper pour. Diodes' recommended layout uses ≥4 thermal vias under the pad connected to inner-layer ground planes, achieving ≤35°C/W junction-to-board thermal resistance in typical 4-layer board configurations.
PI3DPX8121AZLEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- ReDriver™
- Package/Case:
- 60-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Buffer, ReDriver
- Applications:
- DisplayPort
- Input:
- DisplayPort
- Output:
- DisplayPort
- Data Rate (Max):
- 13.5Gbps
- Number of Channels:
- 4
- Delay Time:
- -
- Signal Conditioning:
- Input Equalization, Output De-Emphasis
- Capacitance - Input:
- -
- Voltage - Supply:
- 3.3V
- Current - Supply:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 60-TQFN (5x9)
PI3DPX8121AZLEX FAQ
1.How can I place an order for PI3DPX8121AZLEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3DPX8121AZLEX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PI3DPX8121AZLEX reliable?
The price and inventory of PI3DPX8121AZLEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3DPX8121AZLEX is usually 5 days.
3.What payment methods are accepted for PI3DPX8121AZLEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3DPX8121AZLEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3DPX8121AZLEX?
PI3DPX8121AZLEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3DPX8121AZLEX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PI3DPX8121AZLEX?
For technical support, including PI3DPX8121AZLEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3DPX8121AZLEX requirements.
6.How does Aetrix verify that PI3DPX8121AZLEX is sourced from the original manufacturer or authorized distributors?
All PI3DPX8121AZLEX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PI3DPX8121AZLEX meets industry standards.
7.What is the process for return or replacement of PI3DPX8121AZLEX?
All PI3DPX8121AZLEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3DPX8121AZLEX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PI3DPX8121AZLEX part is unused and in its original packaging.
Return procedure for PI3DPX8121AZLEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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