iC-HD2 TSSOP20

Description

iC-HD2 is a robust line driver for industrial 5 V and 24 V applications with four complementary output channels. For signal lines with a characteristic impedance of 30 to 140 Ω the integrated line adapter, optimized to 75 Ω, minimizes ringing effects which arise when there is no line termination. At a supply of 24 V the push-pull driver stages typically provide 200 mA to discharge the line and also have a low saturation voltage (of typically 200 mV with a 40 mA low-side load). The outputs are current limited and short-circuit-proof, shutting down with excessive temperature. For bus applications the driver stages can be switched to high impedance by a high at input NEN. The driver stage inputs have a Schmitt trigger characteristic and are compatible with CMOS and TTL levels. The device recognizes under voltage at voltage regulator output VREF and thus indirectly also at supply voltage VB. VREF acts as a 5 V voltage supply for external loads of up to 5 mA. Excessive temperature and under voltage are signaled as an error by a low signal at the short-circuit-proof NERR output. For test purposes the temperature monitor can be deactivated by applying a voltage of greater than 12 V to input NEN. The iC-HD contains internal ESD protection circuitry.

Features