J-Link JTAG Isolator (8.07.00)
Standard 20-pin 0.1 male connector to provide electrical isolation, Segger
The J-Link JTAG Isolator can be connected between J-Link and any ARM-board that uses the standard 20-pin JTAG-ARM connector to provide electrical isolation. This is essential when the development tools are not connected to the same ground as the application. It is also useful to protect the development tools from electrical spikes that often occur in some applications, such as motor control applications. Another typical field of application is development of products with sensors or other analog circuitry, in which case the target hardware is protected from electrical noise originating from the development PC.
This product is compatible with J-Link, J-Link PRO, J-Link ULTRA, J-Link ULTRA+, J-Link PLUS and Flasher ARM.
Including all models, more than 100,000 J-Links have been sold so far, making J-Link probably the most popular emulator for ARM cores and the de-facto standard.

Features
Connectors and indicators
The JTAG Isolator uses high speed optocouplers that allow a very low propagation time between input and output. It comes with the following connectors and indicators:

Contents
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Code: J-Link JTAG Isolator (8.07.00)
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Standard 20-pin 0.1 male connector to provide electrical isolation, Segger