SEGGER 8.06.16 – J-Link 6-Pin Needle Adapter connects a J-Link or SEGGER Flasher to a PCB that omits a mating connector or header. It adapts from the standard 20-pin 0.1″ J-Link/JTAG connector to a compact 6-pin spring-needle pattern intended for SWD-based bring-up and production programming. A tri-pin locating pattern ensures correct orientation, while high-reliability spring pins provide stable contact during test and programming.
This 6-pin variant targets SWD; if full JTAG or target-power pin support is required, consider the SEGGER 10-Pin Needle Adapter (8.06.04). For alternative compact connectors (e.g., Cortex-M 10-pin 0.05″), see the 50-Mil 10-Pin Patch Adapter, and for general J-Link probes visit J-Link BASE Compact.
Engineers choose the needle approach to save PCB area and remove BoM and assembly cost associated with fitted headers, particularly in space-constrained or high-volume designs. The footprint and pinout are widely documented, simplifying PCB library creation and production use.
What to know: Six pins support SWDIO, SWCLK, RESET, SWO (optional), VTref and GND; for JTAG (TMS/TCK/TDI/TDO) use the 10-pin needle adapter.
- key_feature_2: 6-Pin SWD Needle Interface - key_feature_2_tooltip: {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Provides SWDIO, SWCLK, RESET, VTref, GND and optional SWO via spring needles, enabling reliable debug/programming on boards without fitted connectors while minimising PCB area and handling time during bring-up and production."}]}]} - key_feature_3: Tri-Pin Locating Pattern - key_feature_3_tooltip: {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Three locating pins key the adapter footprint so it can only seat one way. This reduces placement errors on the line and improves first-time pass rates during programming or boundary tests."}]}]} - key_feature_4: High-Reliability Spring Pins - key_feature_4_tooltip: {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Pogo-style contacts accommodate board tolerances and oxidation better than bare pads, maintaining stable contact force for repeatable programming across many cycles and fixtures."}]}]} - key_feature_5: Saves PCB Space & BoM - key_feature_5_tooltip: {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Eliminates through-hole or SMT headers, reducing component count, assembly time and keep-out zones—useful in compact enclosures and cost-sensitive production."}]}]} - key_feature_6: Adapts 20-Pin J-Link - key_feature_6_tooltip: {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Converts the standard 20-pin 0.1″ J-Link/JTAG connector to the 6-pin needle footprint, keeping existing J-Link cables, scripts and workflows unchanged."}]}]} - key_feature_7: Documented Pinout - key_feature_7_tooltip: {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Pin definitions align with SEGGER’s published SWD guidance (VTref, SWCLK, SWDIO, SWO optional, RESET, GND), easing library creation and DFM checks."}]}]} - key_feature_8_tooltip: {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"If a project later needs JTAG or target power over the needle connection, migrate to the 10-pin needle variant without changing J-Link tooling or software."}]}]} - key_feature_8: Upgrade Path to 10-Pin - why_people_choose_3_title: Fits Existing J-Link Workflows - why_people_choose_2_title: Orientation-Safe, Repeatable Contact - why_people_choose_1_title: Eliminate Headers On Production PCBs - why_people_choose_1: Removes the need for fitted connectors, saving BoM, assembly time and precious PCB area in compact products. - why_people_choose_3: Adapts the standard 20-pin J-Link cable to a small SWD footprint without changing tools, scripts or fixtures. - why_people_choose_2: Locating pins and spring needles improve placement accuracy and contact reliability during bring-up and volume programming. - 1569147: What problem does the 6-pin needle adapter solve?***SIMP***It enables SWD debug/programming on boards without connectors, reducing BoM and PCB area while preserving J-Link workflows. - 1569148: Which signals are available on the 6-pin footprint?***SIMP***VTref, SWDIO, SWCLK, RESET, GND and optional SWO for trace/printf. For JTAG signals, use the 10-pin version. - 1569149: Does it supply power to the target?***SIMP***The 6-pin version is intended for SWD signalling. If you need JTAG and the 5 V target-power pin via needle connection, use the 10-pin needle adapter (8.06.04). - 1569151: How does it ensure correct orientation?***SIMP***A three-pin locating pattern keys the adapter so it only mates one way. This reduces operator error and rework. - 1569152: Is this the same as Tag-Connect?***SIMP***It’s a similar “spring-pin to pad” concept. SEGGER notes its needle pinout is based on Tag-Connect but not identical; the 10-pin variant includes a 5 V supply pin. - 1569153: Will it work with J-Link BASE/PLUS/PRO and SEGGER Flashers?***SIMP***Yes—designed for J-Link and Flasher families via the 20-pin 0.1″ connector. See also the J-Link BASE Compact. - 1569154: What PCB footprint size should I plan for?***SIMP***Use SEGGER’s published pad pattern from the datasheet; the footprint is smaller than a fitted header, aiding dense layouts. - 1569155: How does this compare to more expensive fixtures?***SIMP***Versus custom bed-of-nails fixtures, needle adapters offer much lower NRE and faster setup while still giving repeatable contact for programming. - 1569156: Any workflow tips for first bring-up?***SIMP***Follow SEGGER SWD pin guidance (VTref, RESET handling, optional SWO). Verify pull-ups/downs per device vendor before first connection. - 1569157: What if I need a different connector standard later on?***SIMP***SEGGER provides adapters such as the 50-Mil 10-Pin Patch Adapter and the Target Supply Adapter to cover other scenarios.