The transceivers of the SN75LBC978 can be enabled to function as totem-pole or open-drain outputs. The open-drain mode drives the wired-OR lines of SCSI (BSY, SEL, and RST) by inputting the data to the direction control input DE/RE instead of the A input.
| 器件型号 | 名称 | 产品系列 |
| SN75LBC978 | 9 通道差动收发器 | RS-485 |
