Home / Semiconductors / 74 Series-Dip Package / 7404 IC TTL. Menu; 3D Printers/CNC Machines. 3D Printers. 3D Printer Replacement Parts - Ender ... 7404, Integrated ... 7404 Pinout Diagram If you just connect an output of your 7404 chip to a BNC connector you don't have to worry about pull-ups or pull-downs on the output side. It looks like outputs of this chip cannot be tristated so you should always have a known output of the BNC connector. The output will be determined by the input of the NOT gate. 74LS04 - 74LS04 Hex Inverter Datasheet - Buy 74LS04. Technical Information - Fairchild Semiconductor 74LS04 Datasheet.