The DC motor with the brush can be controlled by a forward-rotation and reverse-rotation.
Because the transistor that works as a switch is composed by H type, it is called H-bridge.
Moreover, it is only called the bridge driver and the motor reversing driver.

The PWM control signal cannot be input.
Please examine H-bridge driver series that PWM can control.

The output voltage setting function enables setting of the output voltage (motor revolution speed), regardless of the power supply voltage.

It is a circuit that prevents a certain power transistor being turned on at the same time in the top and bottom of the output stages.
It achieves by adding the circuit delayed at time to have decided standing up of the voltage of the base of the transistor by which the output became "H" state by an external capacitor, and the penetration current can be decreased sharply.

When the direction of the rotation is switched with the motor rotates, should once by way of the state of the brake or the opening.
The following are recommended at time passing.
•When pass the brake: More than time that the voltage of output L side terminal becomes the potential of GND or less when the brake operates.
•When opening pass: 1ms or more.

Diode is not necessary.
However, when the absolute maximum rating of driver IC might be exceeded, some, physical countermeasures (Clamp it by external Zener Di) are necessary.

This term is used becaause the circuit configuration is positioned between one channel and two channels.
Two motors cannot be driven at the same time.