TB67H450FNG Pin Description Pin description of pin No. 1 to 8. Pin No. Pin name Description 1 GND Ground pin 2 IN2 Logic input pin 2 3 IN1 Logic input pin 1 4 VREF Motor output current setting pin 5 VM Motor power supply 6 OUT1 Motor output pin 1 7 RS Motor output current sense pin 8 OUT2 Motor output pin 2 4 2019-04-01