H-bridge
- The switching elements (Q1..Q4) are usually bi-polar or FET transistors, in some high-voltage applications IGBTs. Integrated solutions also exist but whether the switching elements are integrated with their control circuits or not is not relevant for the most part for this discussion.
- The diodes (D1..D4) are called catch diodes and are usually of a Schottky type.
substitutes
The biggest difference between the HIP4080A and the HIP4081A is that the HIP4081A allows separate and individual control of the 4 MOSFET gates, whereas the HIP4080A does not.
Pic16F177x
- pin 28
pic16f1778
- pin 40
pic16f1777
pic16f1779
There is no alternative to the PIC16F177x; a redesign is required.