Eight-Channel Level Shifter Drives Logic FETs

The iC-MFL is a monolithically integrated, eight-channel level shifter for driving logic FETs. The device’s internal circuit blocks have been designed in such a way that with single errors, such as open pins or the short-circuiting of two outputs, the iC-MFL’s output stages switch to a predefined, safe state. Externally connected FETs therefore shut down safely in the event of a single error. The device is now qualified for typical SIL/ASIL applications according to AEC Q100. Typical applications include driving FETs from 1.8-V, 3.3-V or 5-V TTL- and CMOS-compatible systems such as FPGAs and modern MCUs and CPUs with a “fail safe” requirement. The inputs of the eight channels consist of a Schmitt trigger with a pull-down current source and are compatible with TTL and CMOS levels (1.8 V, 3.3 V or 5 V) and are voltage-proof up to 18 V. Pull-down resistors provide the safe levels at open inputs and have two stages in order to minimize power dissipation with enhanced noise immunity. The eight channels have a current limiting push-pull output stage and a pull-down resistor. The devices operate from -40°C to 125°C and are available in a RoHS-compatible QFN24 package. The iC-MFL is in production and costs $2.54 in lots of 1000. IC-HAUS GMBH, Bodenheim, Germany. +49 61 35/92 92-0