TSM-104-01-S-DV-002

FAQFrequently Asked Questions

• Can the TSM-104-01-S-DV-002 be used as a direct replacement for older 0.100" pitch headers in existing board designs without PCB layout modifications? The TSM-104-01-S-DV-002 maintains the standard 0.100" (2.54mm) pitch and surface mount footprint, making it compatible with legacy board designs using similar headers. However, verify that your existing PCB pads accommodate the SMD termination style, as this header uses solder termination rather than through-hole. If your design currently uses through-hole headers, the TSM-104-01-S-DV-002 will require PCB layout changes to implement the SMD pad pattern. Cross-reference the exact pad dimensions and solder mask clearances in the Samtec datasheet to ensure manufacturing compatibility.
• What are the practical implications of the TSM-104-01-S-DV-002 having 7 loaded positions out of 8 total positions? The TSM-104-01-S-DV-002 is supplied with only 7 contact positions populated, meaning one position remains empty. This configuration is typically used when designs require a keying mechanism or when a specific pin assignment excludes one position by design. Before finalizing your design, confirm whether the missing position aligns with your intended pinout and whether a fully populated 8-position variant better suits your application. If you require all 8 positions, you may need to specify a different part number or contact Samtec for custom configurations.
• How does the gold contact finish on the TSM-104-01-S-DV-002 mating surface affect signal integrity and long-term reliability in high-frequency applications? The gold finish (30.0µin / 0.76µm thickness) on the TSM-104-01-S-DV-002 mating contacts provides superior corrosion resistance and low contact resistance compared to bare copper or tin finishes. For high-frequency signals above 1 GHz, the gold plating reduces oxidation-induced impedance variations and maintains consistent RF performance across thermal cycling and humidity exposure. The tin plating on the post (solder side) facilitates reliable solder joint formation. In industrial environments with temperature swings (-55°C to 125°C), this dual-finish approach mitigates contact resistance drift that can degrade signal fidelity over years of operation.
• What design constraints should be considered when integrating the TSM-104-01-S-DV-002 into a push-pull mated connector system? The TSM-104-01-S-DV-002 features push-pull fastening, which requires a complementary receptacle with compatible latching geometry. When designing your mating connector interface, ensure that the receptacle housing can accommodate the push-pull mechanism's engagement and disengagement forces without inducing mechanical stress on the solder joints. Validate that PCB flex, vibration isolation, and cable routing do not create lateral stresses that could loosen the connection. For applications with frequent mating cycles (e.g., test fixtures or field-replaceable modules), perform mechanical fatigue analysis or prototype testing to confirm the solder joint longevity under repetitive insertion and removal.
• Is the TSM-104-01-S-DV-002 suitable for high-vibration industrial or automotive applications, or should alternative connectors with strain relief features be considered? The TSM-104-01-S-DV-002 is an unshrouded, surface-mount header with limited mechanical support beyond the solder joint interface. In high-vibration environments (e.g., automotive underbody, factory automation, aerospace), the solder joint experiences cyclic stress that can lead to fatigue cracking over time. While the header's operating temperature range (-55°C to 125°C) supports automotive thermal demands, the lack of integral strain relief or mechanical support structures increases risk in applications exceeding 2G continuous vibration. For such scenarios, evaluate alternatives with cable strain relief boots, reinforced mounting brackets, or conformal coating to improve fatigue life. If the TSM-104-01-S-DV-002 is selected, supplement the design with potting compound or structural adhesive to stabilize the solder connections.
• What is the contact mating length of the TSM-104-01-S-DV-002, and how does this affect connector engagement depth and signal pathway impedance in high-speed designs? The TSM-104-01-S-DV-002 has a contact mating length of 0.230" (5.84mm), which defines the depth of engagement between the header's male pins and the receptacle's female contacts. This mating depth influences the effective series inductance and contact resistance in the signal path. For high-speed applications (USB 3.x, LVDS, DDR memory interfaces), the 5.84mm contact length contributes approximately 1–2 nH per pin pair, which is generally acceptable for frequencies up to 500 MHz. However, in ultra-high-speed designs (PCIe Gen 4 or higher), verify the total interconnect inductance budget; if your stack-up includes multiple connector stages, the cumulative inductance may require careful impedance tuning or signal integrity simulation with the TSM-104-01-S-DV-002's actual contact model.
• Can the TSM-104-01-S-DV-002 be populated with a subset of positions, or does Samtec require ordering fully populated 8-position headers? The TSM-104-01-S-DV-002 is delivered as a pre-configured 7-position loaded assembly; individual position customization at order time depends on Samtec's manufacturing minimums and custom options. If your design requires fewer than 7 positions or a different loading pattern, contact Samtec directly to explore semi-custom or custom assembly services. Alternatively, some design practices populate the full 8-position header and electrically disable unused positions through high-impedance pull-ups or not routing traces to those pins, though this adds PCB complexity. Document your specific pinout requirements early in the design phase to confirm feasibility with your supplier.
• How does the Liquid Crystal Polymer (LCP) insulation material in the TSM-104-01-S-DV-002 compare to phenolic or polyimide materials in terms of thermal stability and creep resistance during extended operation at 125°C? Liquid Crystal Polymer (LCP) provides superior thermal stability, dimensional consistency, and creep resistance compared to phenolic or standard polyimide materials, especially at elevated temperatures. The TSM-104-01-S-DV-002's LCP insulation maintains structural integrity throughout the full -55°C to 125°C operating range, with minimal dimensional drift during long-term thermal cycling. LCP's low coefficient of thermal expansion (CTE) reduces mechanical stress at the solder joint interface when experiencing temperature swings. Additionally, LCP exhibits lower moisture absorption than phenolic materials, supporting higher reliability in humid industrial environments. The UL94 V-0 flammability rating of the TSM-104-01-S-DV-002 reflects this material's inherent fire resistance, beneficial for safety-critical or enclosed system designs.
• What accommodation considerations exist for designing cables or harnesses that mate with the TSM-104-01-S-DV-002 header in field-replaceable applications? The TSM-104-01-S-DV-002 is a board-to-board or cable-to-board header with unshrouded male pins, requiring careful cable assembly design to prevent accidental short circuits. When specifying a mating cable connector, select a receptacle with keying features or polarization slots to prevent reverse insertion. The push-pull fastening requires operators to understand engagement and disengagement procedures; provide clear labeling or mechanical guides on the PCB or enclosure to minimize field assembly errors. For high-reliability field replaceable modules, consider adding a connector position-assurance clip or cable latching mechanism to the receptacle. Document the mating procedure and torque specifications (if applicable) in the system's field service manual.
• What is the relationship between the TSM-104-01-S-DV-002's 2-row configuration and differential pair routing in high-speed serial protocols like HDMI, DisplayPort, or USB 3.x? The TSM-104-01-S-DV-002 features 2 rows with 0.100" spacing between rows, allowing differential pairs to be routed side-by-side (same row) or across rows (opposite rows) depending on PCB layout strategy. For high-speed differential signaling, co-locate the positive and negative pins of a pair to minimize loop area and maintain controlled impedance (typically 85–100 ohms for standard differential pairs). The 2-row geometry enables efficient routing but requires careful length matching and return-path planning to prevent crosstalk. When designing for HDMI, DisplayPort, or USB 3.x with the TSM-104-01-S-DV-002, perform electromagnetic simulation (HFSS or equivalent) to validate differential impedance across the frequency range of interest, as the header's contact inductance and PCB trace geometry collectively influence signal integrity.