5409/DM7409 Quad 2-Input AND Gateswith Open-Collector OutputsGeneral Des criptionThis device contains four independent gates each of whichperforms the logic AND function. The open-collector outputsrequire external pull-up resistors for proper logical operation.Pull-Up Resistor EquationsRMAX eVCC (Min) b VOHN1 (IOH) a N2 (IIH)RMIN eVCC (Max) b VOLIOL b N3 (IIL)Where: N1 (IOH) e total maximum output high current for alloutputs tied to pull-up resistorN2 (IIH) e total maximum input high current for allinputs tied to pull-up resistorN3 (IIL) e total maximum input low current for allinputs tied to pull-up resistor