# Splitter PCB Design & Assembly, PCBA Service Supplier

_Published: 2025-08-19_

Table of Contents

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- What is Splitter PCB?
- What is the Purpose of Splitter PCB?
- What Are Types of Splitter PCB?
- What Are Applications of PCB Splitter?
- HDMI Splitter PCB Design Technical Parameter
- How to Design a HDMI Splitter PCB?
- How to Assemble a Splitter PCB?
- Why Choose EBest Circuit (Best Technology) as PCBA Service Supplier?

What is[splitter PCB](https://www.bestpcbs.com/blog/2025/08/splitter-pcb-design-assembly-pcba-service-supplier/)? Let’s explore its function, types, applications, technical parameter, design guide, assembly processes through this blog.

**Customer Pain Points and Difficulties:**

- Severe signal attenuation and short transmission distance? (Splitter PCB uses high-precision impedance matching to ensure lossless signal distribution and extend transmission distance.)
- Multi-path signal interference and poor stability? (Splitter PCB’s optimized isolation design effectively suppresses EMI/EMC and ensures signal purity.)
- Complex assembly process and low yield? (Splitter PCB’s standardized production process and automated SMT placement improve consistency.)

**EBest Circuit (Best Technology) can provide services and solutions:**

**Customized Design Support: Provide impedance simulation and stack up optimization to ensure Splitter PCB meets your signal distribution needs.
Efficient Production and Delivery: 7-day proofing and 15-day mass production, quickly responding to your project schedule.
Full-Process Quality Assurance
ISO 9001 control throughout the entire process, from PCB manufacturing to assembly and testing, ensures reliability.**

**Let EBest Circuit (Best Technology) be your splitter PCB expert and solve your signal distribution challenges!** **Contact us now if you have any request for [splitter PCB](https://www.bestpcbs.com/blog/2025/08/splitter-pcb-design-assembly-pcba-service-supplier/) design and assembly: [sales@bestpcbs.com](mailto:sales@bestpcbs.com).**

## What is Splitter PCB?

A[splitter PCB](https://www.bestpcbs.com/blog/2025/08/splitter-pcb-design-assembly-pcba-service-supplier/) is a printed circuit board (PCB) specifically designed for signal or power distribution. It distributes input signals/currents to multiple output ports in equal or unequal proportions, enabling system signal synchronization or power isolation.

[https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/main-25.jpg](https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/main-25.jpg)

## What is the Purpose of Splitter PCB?

- RF Signal Distribution: Used in communications equipment (such as base stations and routers), it splits RF signals into multiple channels.
- Mixed Signal Isolation: Isolates noise interference from analog and digital circuits.
- Power Management: Distributes different voltage rails in multi-voltage systems (such as automotive BMS).
- High-Speed Interface Optimization: Improves the transmission stability of high-speed signals such as PCIe/USB4.
- Test Support: Facilitates device debugging and performance monitoring.
- Flexible Electronics Integration: Adapts to the compact space requirements of wearable devices and foldable displays.

## What Are Types of Splitter PCB?

- POE Splitter PCB: Separates Power over Ethernet (PoE) into data and power, adapting to non-PoE devices.
- Audio Splitter PCB: Distributes audio signals to multiple output channels (such as 3.5mm/RCA jacks), supporting parallel connection of speakers or headphones.
- Fan Splitter PCB: Connects multiple fans (12/24V) in parallel, simplifying wiring for cooling systems (such as 3D printers or chassis fans).
- HDMI Splitter PCB: Duplicates a single HDMI signal to multiple displays, supporting 4K/8K video transmission (such as conference presentations or advertising screens).
- USB Splitter PCB: Expands a single USB port into multiple ports, supporting peripheral connection or charging (such as keyboards, mice, and mobile phones).

[https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/3-21.png](https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/3-21.png)

## What Are Applications of PCB Splitter?

- Communications and RF Systems – Signal distribution (such as 1-to-2 splitters), frequency band division (broadband equal power division), and RF test equipment (connecting signal sources and measuring instruments).
- Audio Equipment – Speaker crossover (high/mid/low frequency band distribution), electronic crossovers (weak signal division before amplifiers).
- Automotive Electronics – Power control (motor controllers, battery management systems), intelligent driving (millimeter-wave radar high-frequency PCBs), new energy battery data acquisition cables (FPC flexible monitoring).
- Consumer Electronics – Smartphones/tablets (HDI boards, flexible PCBs), wearable devices (lightweight and heat-resistant designs).
- Industrial and Aerospace – Extreme environments (high temperature/high pressure/strong electromagnetic interference), high-precision control (multilayer boards, ceramic substrates).
- Data Centers and Cloud Computing – High-speed signal transmission (servers, data center multilayer boards), low-latency data processing.
- Smart Home and IoT: Wireless device integration (sensors, communication modules), low-power flexible PCB design.

## HDMI Splitter PCB Design Technical Parameter

**Parameter Category**
**Technical Specifications**

Input/Output Interface
1×HDMI input, 2×/4×/8×HDMI outputs (configurable)

HDMI Version Support
HDMI 2.0b/2.1 (supports 4K@60Hz, HDR, HDCP 2.2/2.3)

Resolution Support
Maximum 4K@60Hz (4:4:4), compatible with 1080P/720P and below

Signal Bandwidth
18Gbps (HDMI 2.0) / 48Gbps (HDMI 2.1)

Operating Voltage
DC 5V (typical)

Power Consumption
≤5W (static), ≤10W (dynamic)

PCB Layers
4-6 layer board (impedance-controlled layers)

PCB Material
FR-4 (Tg≥170℃), optional high-frequency material (e.g., Rogers 4350B)

Differential Impedance
100Ω±10% (HDMI differential signal lines)

Signal Integrity
Insertion loss ≤-3dB@6GHz, return loss ≤-10dB@6GHz

EDID Support
Dynamic/Static EDID storage (EEPROM capacity ≥256Byte)

HDCP Support
HDCP 1.4/2.2/2.3 compliant

Connector Type
HDMI Type A female socket (gold-plated contacts, thickness ≥15μm)

ESD Protection
Human Body Model ±8kV, Machine Model ±200V (IEC 61000-4-2)

Operating Temperature
0℃~70℃ (commercial grade), optional -40℃~85℃ (industrial grade)

Certification Standards
CE, FCC, RoHS, HDMI Adopter Certification

## How to Design a HDMI Splitter PCB?

HDMI **[splitter PCB design](https://www.bestpcbs.com/blog/2025/08/splitter-pcb-design-assembly-pcba-service-supplier/)** guide:

**1. Basic Layout and Stackup Design**

**Shortening the signal path:**

- Minimize the distance between the HDMI connector and the processing chip (such as the TMDS341A) to reduce signal attenuation and EMI.

**Stackup Structure:**

- Use at least a 4-layer PCB (6 layers recommended), including a complete power and ground layer.
- High-speed signal layers should be placed adjacent to the ground layer to enhance magnetic field coupling and suppress EMI.

**2. Differential Signal Impedance Control (100Ω)**

**Trace Rules:**

- A 1:1 differential pair width/space ratio is recommended, with intra-pair error ≤ 5 mil and inter-pair error ≤ 10 mil.
- Trace spacing (s) must meet the following requirements: `s < h` (dielectric thickness), `s < W` (line width), and `d > 2s` (distance from other traces).
- Use a 2D field solver to accurately calculate impedance, avoiding reliance on empirical values.

**Via Design:**

- Use small vias (8 mil/16 mil recommended) to reduce capacitance effects and impedance drop.
- Avoid switching high-speed signals across different layers; otherwise, additional return vias will be required.

**3. Power Supply and Decoupling Capacitor Design**

- Power Inlet: Place a 10μF tantalum capacitor for voltage regulation.
- Chip Power Supply: Place a 0.1μF or 0.01μF ceramic capacitor next to each high-speed chip, and connect the capacitor pins with double vias to reduce inductance.
- Decoupling Capacitors: Configure at least one 4.7μF capacitor and five 0.1μF capacitors, connecting them directly to the power plane (minimizing the path).
- Power Plane: Avoid signal lines crossing split planes to ensure a continuous return path.

**4. EDID Management Strategy**

- EDID Compose Mode: Automatically analyzes the resolutions of all displays and selects the lowest compatible value (e.g., 1080P) to ensure compatibility.
- Fixed Mode: Forces the output to a specific resolution (e.g., 4K@60Hz) to accommodate high-end devices.
- Priority Setting: Supports port priority (for example, when Output 1 is disconnected, Output 2 defaults to 1080P)

**5. Design for Manufacturability (DFM)**

**Trace Equal Length:**

- Length deviation within a differential pair should be ≤ 5 mil to prevent EMI caused by phase shift.
- Use curved or serpentine traces to correct for length differences.

**Pad and Spacing:**

- HDMI pads should be minimized to prevent impedance mismatch.
- The copper pad to board margin distance should be ≥ 75 mil to meet production process requirements.

**6. Expandable Functionality and Compatibility**

**Output Port Planning: **

- Select the number of ports based on requirements (e.g., 1×2/1×4), and reserve one or two spare ports for upgrades.

**Supported Protocols:**

- Ensure support for HDCP 1.4+/HDMI 2.0, 4K@60Hz, and 3D formats.
- Integrate CEC commands (e.g., one-button standby and remote control passthrough) to enhance the user experience.

**External Power Supply: **

- Multiple ports (≥4 outputs) require a separate 12V/5A power supply to avoid power shortages.

**7. Design Considerations**

- Avoid Cross-Splits: A complete reference plane is required beneath the differential lines, otherwise impedance jumps and noise will occur.
- Capacitor Selection: Use low-ESL ceramic capacitors for high-frequency ranges (>100MHz) and tantalum capacitors for voltage stabilization in low-frequency ranges.
- Connector Quality: Use connectors that meet HDMI impedance standards to avoid signal reflections.

[https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/2-14.png](https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/2-14.png)

## How to Assemble a Splitter PCB?

Below are** [splitter PCB assembly](https://www.bestpcbs.com/blog/2025/08/splitter-pcb-design-assembly-pcba-service-supplier/)** processes:

**1. Prepare Materials & Tools**

- Gather Splitter PCB (pre-etched), component kit (resistors, capacitors, transmission lines), solder wire, flux, soldering iron, tweezers, multimeter.
- Inspect PCB for cleanliness and shorts; verify components match BOM (e.g., resistor values).

**2. Component Placement**

**Align components with PCB silkscreen:**

- Insert resistors/capacitors into pads; press gently.
- Embed transmission lines (e.g., quarter-wavelength microstrip) into slots, ensuring contact with pads.
- High-frequency parts (e.g., Wilkinson resistors) must follow polarity marks.

**3. Soldering**

- Set iron to 280–320°C (use lower temp for PTFE to avoid warping).
- Steps:a. Apply flux to pad/lead.b. Feed solder until melted; remove iron for smooth joints.c. Use “drag soldering” for SMD parts.
- Focus: Transmission line joints and isolation resistors (avoid cold joints/bridges).

**4. Quality Inspection**

- Visual check: Conical, shiny solder joints with no cracks.
- Electrical test: Measure resistance (e.g., isolation resistors) with multimeter (≤5% deviation).
- Continuity test: Short input to one output; others should show no connection.

**5. Functional Verification**

- Connect signal generator and spectrum analyzer:a. Input signal to PCB; measure output power (e.g., 1-to-2 divider: ≤0.5dB difference).b. Test port isolation (e.g., ≤-20dB).
- Debug: Re-solder components if power imbalance or poor isolation persists.

**6. Cleaning & Protection**

- Wipe flux residue with alcohol to prevent corrosion.
- Apply conductive adhesive on edges for RF applications to reduce EMI.
- Package in anti-static bags with specs/test results labeled.

**7. Notes:**

- Use automated soldering for high-frequency PCBs (e.g., 77GHz automotive radar) to avoid parameter shifts.
- Prioritize network analyzers for testing; multimeters suit low-frequency checks only.

[https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/1-21.png](https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/1-21.png)

## Why Choose EBest Circuit (Best Technology) as PCBA Service Supplier?

Reasons why choose us as splitter PCB assembly service supplier:

- 19 Years of Industry Experience: Proven expertise in RF/high-speed splitter PCB assembly for 5G, automotive, and IoT applications.
- Full Certification Compliance: ISO 9001, IATF 16949, ISO 13485 and RoHS, UL certified, and ensures global market compliance and reliability.
- Cost-Effective Solutions: Competitive pricing and optimized material sourcing help reduce your production costs by 15-30%.
- Free DFM & Design Support: Expert impedance matching (e.g., 50Ω RF traces) and signal integrity analysis ensure optimal splitter PCB performance.
- Reliable Quality Control: Strict process control with AOI/SPI/X-Ray inspection ensures 99.5% assembly yield and minimal defects.
- Fast Turnkey Assembly: 7-day prototype delivery and 15-day mass production for splitter PCB orders (100pcs–10Kpcs).
- Advanced SMT Capabilities: Supports 01005-size components and 0.3mm BGA assembly for high-density splitter PCB designs.
- Effective Signal Isolation: Dedicated EMI/EMC control measures prevent crosstalk in mixed-signal splitter boards.
- Flexible Scalability: Seamless transition from prototypes to large-scale production (1M+ units) with consistent quality.
- 24/7 Technical Support: Dedicated engineers provide real-time DFM feedback and troubleshooting support.

Welcome to contact us if you have any request for PCBA service: **[sales@bestpcbs.com](mailto:sales@bestpcbs.com)**.