Product News: Electrical Equipment & Systems

Galvanic Isolator improves serial scan interference immunity.

Press Release Summary:

Galvanic Isolator improves serial scan interference immunity.

Aug 29, 2012 - Designed for applications in critical signal environments requiring interference immunity and potential isolation, TAP-Isolator module enables complete galvanic insulation of Test Access Port (TAP) transceiver from target. This box can be used in each scan path and separates transceiver's primary TAP interface from target's secondary TAP interface. Potential isolation eliminates mutual interference between TAP transceiver/target, increasing functional safety of Boundary Scan applications.

GOEPEL electronics LLC - Austin, TX

Original Press Release

GOEPEL Electronic Makes Boundary Scan Applications Interference-Free

Press release date: Aug 27, 2012

GOEPEL electronic introduces the TAP-Isolator, a special module to improve interference immunity in serial scan operations.

The newly developed hardware was specifically designed for applications in critical signal environments needing potential isolation, enabling a complete galvanic insulation of the Test Access Port (TAP) transceiver from the target.

"The topic of interference immunity and potential isolation play a role for mixed-signal designs with integrated power electronics. Moreover, they are requested from the start in several safety-critical applications in the areas of space and avionics as well as medical technology", says Bettina Richter, Marketing Manager with GOEPEL electronic. "The TAP-Isolator is a standard product addressing these issues for conventional single-ended interconnections. In combination with the already available solutions for potential isolation for differential signal transmissions we are now able to cover every application scenario."

The TAP-Isolator is an small stand-alone box that can be used as add-on hardware in each scan path.  It separates the transceiver's primary TAP interface from the target's secondary TAP interface, and is easily upgradable at any time.

The potential isolation eliminates mutual interference between TAP transceiver and target. That means an increase in the functional safety of Boundary Scan applications such as interconnection test, PLD programming or Flash programming.

The TAP-Isolator can be operated on the secondary side with fixed or variable output voltage between 1.8 V and 4.5 V, and maximum transmission frequency of 70 MHz. It supports all standard TAP signals (TCK, TMS, TDI, TDO) as well as the optional /TRST.

The isolation hardware’s possible runtime delays when used with modern Boundary Scan systems such as SCANFLEX® can be individually compensated per TAP by the integrated ADYCS(TM) technology. Additionally, the TAP-Isolator can be run with all JTAG controllers from GOEPEL electronic, e.g. PicoTAP(TM) and SCANBOOSTER(TM), as well as other vendors.

The TAP-Isolator will be ready for shipping in September 2012.

About GOEPEL electronic:
GOEPEL electronic is a worldwide leading vendor of innovative electronic and optical test and inspection systems, being the market leader for professional JTAG/Boundary Scan solutions for Embedded System Access (ESA). A network of branch offices, distributors and service partners ensures the global availability of the products as well as the support of the more than 7,500 system installations. Founded in 1991 and headquartered in Jena, Germany, GOEPEL electronic employs currently about 200 employees and generated a revenue of 26 Million Euro in 2011 (ca. $35 Mio). GOEPEL electronic has continuously been ISO9001 certified since 1996 and has been honoured with TOP-JOB and TOP-100 awards for being one of the best medium-sized companies in Germany. GOEPEL electronic's products won several awards in recent years and are used by the leading companies in telecommunication, automotive, space and avionics, industrial controls, medical technology, and other industries. Further information about the company and its products can be found on the internet at

Press Contact:
GOEPEL electronic GmbH  Tel: +49-3641-6896-739
Stefan Meissner    Fax: +49-3641-6896-944
Goeschwitzer Str. 58-60/66  Email:
D-07745 Jena    URL: