JT 2139 TAP Isolator

Galvanic isolation for TAP signals
Protects instruments within a fixture
Isolates instruments when sharing uut signals
Ideal for ATE builders

The JT 2139 is a TAP signal isolation module designed for use in combinational test systems that utilise multiple instrument interfaces. To avoid parasitic capacitance effects and/or unwanted ground loops the JT 2139 can be used to completely galvanically isolate any JTAG Technologies boundary-scan controller from the remainder of the instrumentation system. JT 2139 isolators are a standard component of the JTAG Technologies ‘Symphony’ systems that integrate boundary-scan with In-Circuits Testers etc..

  • Small design fits easily inside test fixtures
  • One per TAP – only install the number you need per application
  • Basic 5V power supply
  • Full relay isolation per TAP signal
  • Galvanically isolates TAP signals
  • Simple compact design
  • Universally applicable
  • Dimensions 36W x 145L x 12H mm
  • Weight 40 grams
  • 4 x 4mm mounting holes
  • Relay separation for all JTAG outputs (TDI, TMS. TCK, TRST) AW, and User signals

Use in ATEs to fully isolate JTAG/boundary-scan TAP signals from the remainder of the test system. Use of TAP isolation modules avoids the potential for poor functional test measurements due to stray [test] system impedances.

We are boundary-scan

We will ensure that your organisation gets the maximum return on investments and receives the greatest benefits from this technology. Look through our website and support section for whatever kind of information you might need and feel free to contact us if the answer to your question is not provided.