Other Parts Discussed in Thread: CD40109B, UCC27517
The pulse duration I need to generate is 0.1us to 10us.
If 1000pF is used as Cext , and the RL is 1kohm to 10kohm from figure 12 in datasheet. K is 1.11 if 3.3V supply is used (from figure 4.2)
- What is Rext used in this case ? tw = K x Rext X Cext = 1.11 x Rext x 1000pF
Is it directly calculate Rext = tW / (K x Cext ) ?
- How RL calculation involved in this case ? Is it both Rext and RL need to involved in this calculation?