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Diodes Incorporated PI3DBS3224ZNAEX
- Part No.:
- PI3DBS3224ZNAEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Analog Switches - Special Purpose
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
PI3DBS3224ZNAEX.pdf
- Description:
- IC MUX/DEMUX HS 2:4 20-TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,989
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Product details
Overview
PI3DBS3224ZNAEX from Diodes Incorporated is a 2:4 bidirectional differential multiplexer/demultiplexer for high-speed signal routing in DisplayPort auxiliary channel, USB 2.0, and LSRX/LSTX interfaces. It supports single 1:4, dual 1:2, or fan-out 1:2 configurations; delivers 1.2 GHz bandwidth (1:4/1:2 mode), 13 Ω typical RON, ±8-kV IEC61000-4-2 ESD protection, and operates from 3.0–3.6 V.
For engineers reviewing the PI3DBS3224ZNAEX datasheet, PI3DBS3224ZNAEX pinout, PI3DBS3224ZNAEX application, or PI3DBS3224ZNAEX equivalent, key selection criteria include differential channel count, 1.2 GHz bandwidth in standard mux mode, fail-safe high-impedance isolation during power loss, and TQFN-20 (3 × 3 mm) package compatibility with high-density PCB layouts.
Technical Context
The PI3DBS3224ZNAEX implements a CMOS-based analog switch matrix with four independent differential data paths (A0/A1/B0/B1), controlled by two 2-bit select buses (SA[1:0], SB[1:0]) and two enable inputs (ENA, ENB). Its architecture supports simultaneous bidirectional signal flow without polarity inversion or DC bias dependency.
It features fail-safe power-down operation: all I/O pins enter high-impedance state when VCC = 0 V, preventing signal contention or back-driving in unpowered systems. Bandwidth drops to 500 MHz only in fan-out configuration-otherwise maintains full 1.2 GHz performance across all active path combinations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 1.2 GHz (typ) in 1:4/dual 1:2 mode - enables clean transmission of 720 Mbps differential signals like DP AUX or USB 2.0. |
| RON | 13 Ω (typ) - minimizes insertion loss and signal distortion in high-speed differential pairs. |
| ESD Protection | ±8-kV contact discharge (IEC61000-4-2) on I/O pins - eliminates need for external TVS diodes in portable interface designs. |
| Supply Voltage | 3.0–3.6 V - compatible with standard 3.3 V system rails and low-voltage I/O domains. |
| OFF Isolation | −30 dB at 250 MHz - ensures >30 dB crosstalk suppression between inactive and active differential channels. |
| Propagation Delay | 50 ps (typ) - preserves timing integrity in sub-nanosecond edge-rate applications like USB 2.0 packet switching. |
| Package | TQFN-20 (3 × 3 mm, 0.4 mm pitch) - supports fine-pitch routing and thermal dissipation in space-constrained mobile PCBs. |
Pinout & Package
PI3DBS3224ZNAEX is housed in a 20-pin Thin Quad Flat No-Lead (TQFN) package measuring 3 mm × 3 mm with 0.4 mm pitch. The exposed pad enhances thermal performance and must be soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4, 6–11, 14–20 | Differential I/O (INA±, INB±, OUTA0±, OUTA1±, OUTB0±, OUTB1±) | Full-duplex bidirectional signal paths supporting both input and output roles per pin pair. |
| 12, 11, 15, 14 | Control Inputs (SBI, SBO, SAO, SAI) | 2-bit binary select lines per input group - determine routing destination for A and B sources. |
| 16, 10 | Enable Inputs (ENA, ENB) | Independent channel gating - disables entire A or B signal group to Hi-Z state when low. |
| 5 | GND | Signal and power reference plane - connects to PCB ground pour for noise immunity and return path integrity. |
| 13 | VCC | Single 3.3 V supply - powers internal logic and switch FETs; enables fail-safe isolation when absent. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional differential switching | Supports identical signal integrity in either direction - eliminates need for direction-control logic in DP AUX or UART routing. |
| Fail-safe power-down mode | Automatically isolates all I/O pins at high impedance when VCC = 0 V - prevents bus contention in hot-swap or partial-power-down systems. |
| Configurable topology | Hardware-selectable 1:4, dual 1:2, or 1:2 fan-out via control pins - enables reuse across multiple interface standards without redesign. |
| Low ON-capacitance | 9 pF (typ) - reduces loading on high-speed source drivers and preserves signal rise/fall times. |
| RoHS 3 & Halogen-free | Compliant with EU Directive 2015/863/EU and <900 ppm Br/Cl total - meets automotive and consumer environmental requirements. |
Applications
| DisplayPort Auxiliary Channel Multiplexing | USB 2.0 Signal Routing |
|---|---|
|
Use Scenario: Dynamic switching of DP AUX channel between GPU and embedded display controller in dual-display laptops. IC Role / Device Role / Timing Role: Bidirectional 2:4 mux managing I²C-like control signaling at up to 1 Mbps with sub-100 ps skew. Use Value: Enables single physical connector to serve two displays while maintaining AUX protocol timing compliance and ESD robustness. |
Use Scenario: Sharing one USB 2.0 PHY between host processor and peripheral hub in tablet docking stations. IC Role / Device Role / Timing Role: High-fidelity 480 Mbps data path switch with <50 ps propagation delay and <40 ps output skew. Use Value: Eliminates need for dual PHYs - reduces BOM cost and PCB area while preserving full-speed USB 2.0 eye diagram integrity. |
| LSRX/LSTX for USB4/TBT | DDC Channel Switching |
|
Use Scenario: Selecting between two Thunderbolt 3/USB4 controllers for legacy LSRX/LSTX sideband signals in hybrid docking solutions. IC Role / Device Role / Timing Role: Low-latency differential switch handling 100–200 MHz sideband clock/data pairs with matched trace routing support. Use Value: Maintains signal fidelity for link training and status reporting without introducing jitter or duty-cycle distortion. |
Use Scenario: Routing DDC (Display Data Channel) I²C signals between GPU and multiple monitors in multi-monitor workstations. IC Role / Device Role / Timing Role: Bidirectional I²C-compatible switch with <13 Ω RON and <9 pF CON - preserves rise time and pull-up compatibility. Use Value: Prevents I²C bus lock-up during hot-plug events and supports EDID read/write across up to four display ports. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TS3USB30E | Single 2:1 USB 2.0 switch; 500 MHz BW; no fan-out mode; smaller 10-pin UQFN package. | Limited to USB 2.0 only; lacks DP AUX or DDC support due to fixed 2:1 topology and no dual-enable control. | Select when only one high-speed channel needs switching and board space is constrained. |
| PI3DBS12412ZLEX | 12-channel 1:2 differential mux; 1.5 GHz BW; 3.3 V only; larger 32-pin TQFN. | Higher channel count but fixed 1:2 routing; no 1:4 or fan-out capability; requires more complex control logic. | Select when scaling to ≥4 independent differential paths is required and layout area permits larger footprint. |
Compared with TS3USB30E and PI3DBS12412ZLEX, the PI3DBS3224ZNAEX uniquely balances 2:4 flexibility, 1.2 GHz bandwidth, fail-safe isolation, and compact TQFN-20 packaging - making it optimal for multi-standard interface consolidation in mobile and docking platforms.
Availability
PI3DBS3224ZNAEX is available at Aetrix Electronics and suitable for DisplayPort auxiliary channel multiplexing, USB 2.0 signal routing, and DDC channel switching requiring stable component supply and long-term industrial availability.
Supply support for PI3DBS3224ZNAEX 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 interface solutions for computing, communications, and industrial markets.
The PI3DBS3224 belongs to Diodes' Pericom® high-speed signal integrity product line, engineered specifically for low-distortion, low-latency differential switching in USB, DisplayPort, and PCIe sideband applications.
FAQ
Does PI3DBS3224ZNAEX support DC-coupled differential signals?
Yes. The device uses fully complementary CMOS switch architecture with rail-to-rail analog voltage range (0 V to VCC). It passes DC-coupled differential signals without level-shifting or bias dependency, verified across −40°C to +85°C with 3.3 V supply and 100 Ω differential termination.
Can ENA and ENB be tied together for simplified control?
Yes. ENA and ENB may be connected to a common enable signal to activate or disable all four output channels simultaneously. This configures the device as a unified 2:4 mux/demux - confirmed in the function table and supported by identical ICC and IOFF specifications under combined enable conditions.
What is the maximum data rate supported in fan-out configuration?
In fan-out 1:2 mode, the device supports up to 500 MHz bandwidth (typ), corresponding to ~400 Mbps differential data rate with adequate margin for USB 2.0 and DisplayPort AUX eye opening. Measured crosstalk remains ≤−35 dB and OFF isolation ≥−30 dB at 250 MHz per datasheet Section 5.
Is the exposed thermal pad electrically connected internally?
No. The exposed pad on the TQFN-20 package is a mechanical thermal slug only - not connected to any internal node. It must be soldered to a PCB ground plane for thermal conduction but carries no electrical signal or power function, as confirmed in Diodes' PD-2169 mechanical drawing and DS41709 Rev 2-2 package notes.
PI3DBS3224ZNAEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- USB
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Switch Circuit:
- -
- Number of Channels:
- 2
- On-State Resistance (Max):
- 19Ohm
- Voltage - Supply, Single (V+):
- 3V ~ 3.6V
- Voltage - Supply, Dual (V±):
- -
- -3db Bandwidth:
- 1.2GHz
- Features:
- Bi-Directional, USB 2.0
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (3x3)
PI3DBS3224ZNAEX FAQ
1.How can I place an order for PI3DBS3224ZNAEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3DBS3224ZNAEX 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 PI3DBS3224ZNAEX reliable?
The price and inventory of PI3DBS3224ZNAEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3DBS3224ZNAEX is usually 5 days.
3.What payment methods are accepted for PI3DBS3224ZNAEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3DBS3224ZNAEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3DBS3224ZNAEX?
PI3DBS3224ZNAEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3DBS3224ZNAEX 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 PI3DBS3224ZNAEX?
For technical support, including PI3DBS3224ZNAEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3DBS3224ZNAEX requirements.
6.How does Aetrix verify that PI3DBS3224ZNAEX is sourced from the original manufacturer or authorized distributors?
All PI3DBS3224ZNAEX 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 PI3DBS3224ZNAEX meets industry standards.
7.What is the process for return or replacement of PI3DBS3224ZNAEX?
All PI3DBS3224ZNAEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3DBS3224ZNAEX, 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 PI3DBS3224ZNAEX part is unused and in its original packaging.
Return procedure for PI3DBS3224ZNAEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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