This chip is designed as a driver for two external FETs not for driving a motor by itself. If you look at page 1 of the data sheet you will see the typical connections for this.
IN Logic input for high and low side gate driver outputs... Switches the bridge up or down this translates to motor forward or reverse.
SD* Logic input for shutdown Start / stop - when stop uses magneto breaking that is it shorts the motor winding together so it stops quicker.
COM Low side return Ground for logic
LO Low side gate drive output goes to the gate of the bottom FET
VB High side floating supply + power for motor or at least enough to drive the FET gates to fully turn them on.
HO High side gate drive output goes to the gate of the top FET
VS High side floating supply return one side of the motor and the source of the top FET
VCC Low side and logic fixed supply + 3.3V (or 5V) power for logic
how do I know which h-bridges are suitable for motor control?
it depends on the motor you are having ! look fot the stall current rating on your motor and get a motor controller that can serve atleast 1.5X of it just to be sure that it doesn't melt itself
This is a half-bridge driver; you need two of them and four external N-channel MOSFETs to produce a full H-bridge.
I suggest that you read some of International Rectifier's application notes to give you a better grounding. The best place to start, IMO, is AN-1084: Power MOSFET Basics (http://www.irf.com/technical-info/appnotes/an-1084.pdf).
