It can be a significant challenge to avoid the overshoot, undershoot, and ringing issues that can arise from circuit layout. The low impedance of these drivers and their high di/dt can induce ringing between parasitic inductances and capacitances in the circuit. Utmost care must be used in the circuit layout.

In general, position the driver physically as close to its load as possible. Place a 1-µF bypass capacitor as close to the output side of the driver as possible, connecting it to pins 1 and 8. Connect a single trace between the two VDD pins (pin 1 and pin 8); connect a single trace between PGND and AGND (pin 5 and pin 4). If a ground plane is used, it may be connected to AGND; do not extend the plane beneath the output side of the package (pins 5 – 8). Connect the load to both OUT pins (pins 7 and 6) with a single trace on the adjacent layer to the component layer; route the return current path for the output on the component side, directly over the output path.

Extreme conditions may require decoupling the input power and ground connections from the output power and ground connections. The UCCx732x has a feature that allows the user to take these extreme measures, if necessary. There is a small amount of internal impedance of about 15 Ω between the AGND and PGND pins; there is also a small amount of impedance (approximately 30 Ω) between the two VDD pins. To take advantage of this feature, connect a 1-µF bypass capacitor between VDD and PGND (pins 5 and 8) and connect a 0.1-µF bypass capacitor between VDD and AGND (pins 1 and 4). Further decoupling can be achieved by connecting between the two VDD pins with a jumper that passes through a 40-MHz ferrite bead and connect bias power only to pin 8. Even more decoupling can be achieved by connecting between AGND and PGND with a pair of anti-parallel diodes (anode connected to cathode and cathode connected to anode).