hello!
I'm working on a board that contains a TI SN74VC8T245. This device uses a VCC-A and VCC-B at pins 1 and 24 respectively.
The manufacturer has bodged a resistor between the two pins, connecting at the bypass capacitors for each pin.
I was just curious why this was being done. Any insight?
Thanks for the help!
Just guessing here:
-That resistor net effect is to keep the two Vcc's near each other
-So if one goes down, the other goes down, if one comes up, the other comes up
-Sort of synchronizing things
Otherwise, one Vcc might be up a long time (relatively speaking) before the other, with undesirable results.
Also notice the "keep ~OE high until vcca and vccb are up"...similar reasoning