Samtec JTAG Connectors at Toby


Joint Test Action Group, Samtec Industry Standards Connectors

Joint Test Action Group, also known as JTAG, is the common name for IEEE standard 1149.1. This standard defines a method for testing board-level interconnects, which is also called Boundary Scan. In short, JTAG was created to test for common problems, but lately has become a way of configuring devices. The JTAG hardware interprets information from five different signals: TDI (Test Data In), TDO (Test Data Out), TMS (Test Mode Select), TCK (Test Clock), and TRST (Test Report-optional).

JTAG Connectors

Toby offers both JTAG connector and cable solutions from Samtec

Standard Connectors

Standard Connectors with Pin 7 Removed

Suggested Cable Mates


The primary advantage of boundary-scan technology is the ability to observe data at the device inputs and control the data at the outputs independently of the application logic. Simple tests can find manufacturing defects such as unconnected pins, a missing device, an incorrect or rotated device on a circuit board, and even a failed or dead device.

Other Compliant Samtec Series

  • EJH – 2.54mm (.100") Pitch Shrouded IDC Ejector Header
  • FTSH – 1.27mm (.050") Pitch Micro Terminal Strip
  • HMTSW – 2.54mm (.100") Pitch High-Temp Variable Post Height Terminal Strip
  • HTSS – 2.54mm (.100") Pitch High-Temp Shrouded Terminal Strip
  • HTST – 2.54mm (.100") Pitch High-Temp Shrouded Terminal Strip, Cable Mate
  • IDSD – 2.54mm (.100") Pitch Slim Body Double Row, IDC Ribbon Cable Socket
  • IDSS – 2.54mm (.100") Pitch Slim Body Single Row, IDC Ribbon Cable Socket
  • MTLW – 2.54mm (.100") Pitch Low Profile Variable Post Height Terminal Strip
  • MTSW – 2.54mm (.100") Pitch Variable Post Height Terminal Strip
  • TLW – 2.54mm (.100") Pitch Low Profile Terminal Strip
  • TSM – 2.54mm (.100") Pitch Surface Mount Terminal Strip
  • TSSH – 2.54mm (.100") Pitch End Shrouded Terminal Strip
  • TST – 2.54mm (.100") Pitch Shrouded Terminal Strip, Cable Mate
  • TSW – 2.54mm (.100") Pitch Terminal Strip
  • ZSS – 2.54mm (.100") Pitch Shrouded Elevated Terminal Strip
  • ZST – 2.54mm (.100") Pitch Shrouded Elevated Terminal Strip, Cable Mate


As a connector company, Samtec provides products that interact with many types of hardware and software. Samtec comply to a variety of Industry Standards. The majority of Industry Standards they adhere to address the following:

  • Transmission protocols (primarily software & firmware defining machine language to allow communication)
  • Hardware (physical electro-mechanical devices)
  • Interconnection (cables & connectors)
  • Sub-systems (typically daughter or carrier cards which include functional compliance specifications defining electro-mechanicals & mechanicals)

Related link: VITA Standards

Toby supports our customers Industry Standards requirements with Samtec’s excellence in this field. Making the route from application design, test and build as easy as possible. For more information on these and any Samtec series please contact

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This article is and amended version of original information and links from the Samtec standards pages.