I am using a SN754410NE Quad Half H-Bridge to control 2 motors. It works great, except for one thing. When I supply a voltage to pin 8 for the motor power (separate from the chip's logic power), the voltage that comes out of the motor output pins is about 2 volts lower that what I put in. Is this supposed to happen? Can I fix this?
On the fifth page, there is something that might be related. It says that for the test condition "IOH = –1 A" that "VCC2 – 2 V" Is this related? What does this mean?