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5409 DM7409 Quad 2-Input AND Gates with Open-Collector Outputs June 1989 5409 DM7409 Quad 2-Input AND Gates with Open-Collector Outputs General Description Pull-Up Resistor Equations This device contains four independent gates each of which VCC (Min) b VOH performs the logic AND function The open-collector out- RMAX e N1 (IOH) a N2 (IIH) puts require external pull-up resistors for proper logical op- eration VCC (Max) b VOL RMIN e IOL b N3 (IIL) Where N1 (IOH) e total maximum output high current for all outputs tied to pull-up resistor N2 (IIH) e total maximum input high current for all inputs tied to pull-up resistor N3 (IIL) e total maximum input low current for all inputs tied to pull-up resistor Connection Diagram Dual-In-Line Package TL F 6499