> > > Remember the Rogers uQ decoupling capacitors? They were a flat capacitor > that fit under a dip package with leads sticking out at pins 7 and 14, or > 8 and 16, or whatever. The leads were narrow enough to go through the > circuit board hole along with the chip lead. Since the whole flat package > was the capacitor, the lead length and ESL was very low. I used those in > the 1970s and 1980s. Now THOSE were actually useful. I do a routing thing that was inspired by the cap sockets, which actually works. I put the decoupling cap right next to the ground pin, and route VCC to the cap, and then to the chip. Connecting VCC at the VCC pin, and then to the cap really reduces the effectiveness of the cap. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist