2026年8月20日
Can We Use an SMA Connector to Transmit a Clock Signal?
Can we use SMA connector to transmit clock signal? Learn how termination, plating, and retention affect clock edge...
Detailed Product Information
Technical Data & Reference
Structured parameters, material notes, application context and frequently asked questions for engineering and procurement evaluation.
Competitor & Cross-Reference
- Alternative Type
- Intermateable With
- Competitor Part Number
- I-PEX 20878-040T-01 / I-PEX CABLINE-CA II 40-Pin Series
- Mates With
- I-PEX 20525-040E Series 0.4mm Pitch 40-Pin Board Receptacle Header
Intermateable: This part is mechanically and electrically compatible for mating with the listed competitor connector. Mixed use in the same connector system is supported.
Technical Specifications
- Cable Type
- Shielded Micro-Coaxial Cable Assembly (LVDS / FPGA-RF Harness)
- Number of Positions / Pins
- 40 Pins
- Pitch
- 0.4 mm
- Orientation Configuration
- P1: Goldfinger Down / P2: Goldfinger Up (1-to-1 Pinout)
- Overall Cable Length
- 60.5 mm (+2.5 / -1.5 mm)
- Wire Gauge & Impedance
- 40 AWG, 50 Ohms Micro-Coaxial Cable (41 PCS)
- Strain Relief Method
- UV Adhesive Encapsulation at Both Soldering Points
- Standard Compliance
- RoHS Compliant, 100% Electrical Tested
Material Composition
| Material | Value / Description |
|---|---|
| Connector Housing | Black LCP (Liquid Crystal Polymer), 0.4mm Pitch |
| Connector Shell | Metal Shielding Shell-A & B (I-PEX 3488-0401 Equivalent) |
| Lock Cover | Metal Mechanical Lock Cover (I-PEX 3493-0401 Equivalent) |
| Cable Jacket & Conductor | Blue Micro-Coaxial Cable, 40 AWG, 50 Ohms |
| Soldering Reinforcement | UV-Curable Adhesive Resin |
Technical Characteristics
| Characteristic | Value |
|---|---|
| Characteristic Impedance | 50 Ohms |
| Conductor Resistance | < 3 Ohms Max. |
| Electrical Testing | 100% Open, Short, and Continuity Tested |
| Length Tolerance | +2.5 mm / -1.5 mm (Overall Length: 60.5 mm) |
| Wiring Pin Assignment | Direct 1-to-1 Mapping (P1 Pin 1–40 to P2 Pin 1–40) |
Application Scenarios
-
FPGA & RF Signal Interconnects: High-frequency board-to-board RF and clock signal transmission in FPGA development and SDR modules.
-
High-Resolution LVDS / eDP Displays: Internal video harness for industrial HMI panels, medical monitors, and embedded touch displays.
-
Machine Vision & Camera Modules: High-speed MIPI CSI/DSI and LVDS sensor data transfer in compact automated optical inspection (AOI) cameras.
-
UAVs & Robotics: Lightweight, low-profile 40AWG shielded interconnect for gimbal cameras and flight control modules requiring mechanical lock retention.
-
Portable Medical & Test Instruments: High-density internal cabling for handheld ultrasound probes, oscilloscopes, and diagnostic analyzers.
Evidence & Reference Images
Frequently Asked Questions
What is the connector orientation and pinout mapping for this 40-pin micro-coaxial cable assembly?
This assembly features a direct 1-to-1 pin assignment (Pin 1 to Pin 1 through Pin 40 to Pin 40) with an inverted contact orientation: Connector P1 is terminated with the goldfingers facing down, while Connector P2 is terminated with the goldfingers facing up to accommodate opposing PCB mating header placements.
How does this 0.4mm pitch harness maintain signal integrity and mechanical retention?
The cable assembly utilizes 40AWG 50-ohm micro-coaxial conductors paired with full metal shielding shells (3488-0401 equivalent) and mechanical lock covers (3493-0401 equivalent) for 360-degree EMI protection and secure mating retention, while UV adhesive at the soldering points provides strain relief.
What are the electrical testing standards for this 40AWG shielded LVDS/RF harness?
Every cable assembly undergoes 100% electrical verification for open, short, and miswire defects, guaranteeing a maximum conductor resistance of less than 3 Ohms across a 60.5mm (+2.5/-1.5mm) overall assembly length.
Overview and Application Notes
This 0.4mm pitch 40-pin shielded micro-coaxial cable assembly is engineered for high-frequency LVDS, FPGA-RF, and high-speed board-to-board signal transmission. Constructed with 40AWG 50-ohm blue micro-coaxial discrete wires (41 pcs per assembly) and terminated with 0.4mm pitch black LCP housings, dual-shielded metal shells, and mechanical lock covers, this 60.5mm assembly ensures 360-degree EMI shielding and superior signal integrity in compact electronic enclosures.
Key Features
- High-Density 0.4mm Pitch Interface: Features a 40-position plug assembly compatible with I-PEX 20878-040T-01 series, equipped with metal shells (3488-0401 equivalent) and mechanical lock covers (3493-0401 equivalent) for secure retention.
- 50-Ohm Impedance Control: Utilizes 40AWG 50-ohm blue micro-coaxial cables to minimize insertion loss, crosstalk, and signal reflection across high-speed differential and RF channels.
- Reverse Orientation Configuration: Engineered with a 1-to-1 pinout assignment (Pin 1 to Pin 1 through Pin 40 to Pin 40) featuring opposing connector orientations—P1 with goldfingers facing down and P2 with goldfingers facing up.
- Reinforced Strain Relief: Both soldering termination points are encapsulated with UV-curable adhesive to protect delicate 40AWG micro-coaxial conductors against mechanical pull and vibration stress.
- 100% Electrical Verification: Every harness undergoes 100% continuity, open/short testing, and conductor resistance verification (< 3 Ohms max) prior to shipment, fully compliant with RoHS directives.
Engineering Specifications & Assembly Integration
Designed with an overall assembly length of 60.5mm (+2.5mm / -1.5mm tolerance), this custom micro-coaxial harness supports tight bend radii in space-constrained layouts. Notice for PCB layout and mechanical engineers: Connector P1 is terminated with the goldfinger contact surface facing downward, whereas Connector P2 is terminated with the goldfinger contact surface facing upward. The integrated lock cover prevents accidental unmating under shock or high-vibration operating conditions.
