JTAG Isolator is a galvanic isolator for the JTAG interface that protects devices from electrical damage caused by differences in reference potentials between connected devices (e.g. computer and development board).
It provides galvanic isolation of the 5-line JTAG interface, supports TCK frequencies up to 110 MHz, operates with 3–5 V supply from the target device, ensures compatibility with all 3–5 V JTAG interfaces, and offers multiple embedded connectors including IDC10, IDC20, and SIP8.