54LS05/DM54LS05/DM74LS05 Hex Inverters with Open-Collector Outputs General Description This device contains six independent gates each of which performs the logic INVERT function. The open-collector outputs require external pull-up resistors for proper logical operation. Features Y Alternate Military/Aerospace device (54LS05) is available. Contact a National Semiconductor Sales Office/ Distributor for specifications.