I am wondering if anyone has run into a similar problem. I was testing an L298 by having the output being a simple resistive load of 10 k-ohms. This was to make sure it was switching correctly before I put a large amount of current through it. I tested each of the 2 channels separately and tried it with three different devices to make sure it was not a defect in the ic. When using input 1 or 4, the device worked perfectly. The output voltage matched the source voltage and matched the triggering even at high frequency. However, when using input 2 or 3, it did not work. Instead, as soon as it was triggered there was just a bunch of noise and the device began drawing excessive current (not completely shorted but more than could be explained). It is simple to hook up and one of the tested components had worked in the past, while the other two were brand new. I have the 100n caps at their required locations. Any suggestions would be appreciated.