It seems that I fried my 74LS181N ALU, though I'm operating on 4.95v and have a 1k resistor (plus LED) on all output pins. I was sure it could handle those 5mA, but the datasheet suggests an output current of max 0.1 mA.
Im I misreading the datasheet, is it realistic that the ALUs limit is 0.1 mA?
For those who care, for testing I have the pins Vcc and input A0 tied to 5v, the output pins 14-17 floating, and all other on ground.
EDIT: Oh yeah, the chip gets hot.