The CP Series is usable on I/O ports where the signal voltage is positive. It will also protect in accordance with the immunity requirements of IEC61000-4-2 (EN61000-4-2) and IEC 61000-4-4, (EN 61000-4-2), level 4. These devices have been tested up to 25,000 volts of contact ESD. In addition, the CP Series is available for unidirectional signal applications consisting of four lines (CPxx Series), or five lines (CPxxC Series). The CPxxC can also be used on two differential line pair applications. Both series devices are available in a SOT-23-6 package, with voltage types ranging from 5 V to 24 V.