bobthebanana:
Does anyone have a schematic for hooking up a 74LS181 ALU with dip switches so that I could test whether or not it works? I'm having a hell of a time hooking it up on a breadboard; the output pins seem to float around although they generally give the expected output. Also, the chip pulls 200mA and gets slightly warm, so I've probably fried at least part of the chip, or is this normal with the LS group? They were only $1.25 on Tayda, as opposed to $7 on digikey so maybe they're fakes...
The data for the LS181 suggests supply current of 20 to 35mA or so, 200mA suggests you have got something badly wrong or the chip is burnt out.