Part Identification
(UPDATE: This has been reworded to not sound like crap.)
I’m looking for an IC, but having a hard time figuring out exactly which one does what I need.
Here’s what I need it to do:
Have five inputs which are connected to five pins on a microcontroller. Have one common input connected to +5VDC. (This could be common with Vcc for the IC.) When one of the five input pins goes high or low, the common input is connected to or disconnected from the output. The point of this is so that I can provide / sink more current than the microcontroller can handle.
My original idea was just to use five NPN transistors, but I figured I could find something in the form of a single IC and make assembly easier.
This is going to be used to drive some relays and LEDs. I could do it with discreet transistors, but that seems clunky and harder to solder.
What sort of part do I look for, or which data / catalog sheets can I pour over to find something like this?
5 inputs driving an input? Huh?
Do you need a digital switch? I know those exist in chips… perhaps a FET?
there’s also things like electronic potentiometers.
Er, I meant that the five inputs basically connect/disconnect the one input to the five outputs. Or some other similar number.
I was going to use five NPN transistors to drive the relays and LEDs in that thing i’m making, but I was hoping I could find basically the same thing in a chip.
like a mux?
Five NPNs of whatever kind with the collectors all tied together would work just great.
I just updated the post to read better.
Some sort of Darlington Driver IC should do, something like a Nat Semi DS2003CJ, there might even be some in the 74*** range of ICs.
That nat semi part even has the protection diodes included to protect the driver from any voltage from the inductive load.
Thanks very much, I wasn’t even sure which sort of part to start looking at. I’ll have to dig through some 74-series parts as well…
Looks like the ULQ2003A will do it, and the price is also reasonable.