SCAS966 February 2024 SN74AC16-Q1
ADVANCE INFORMATION
Refer to the PDF data sheet for device specific package drawings
In this application, an open-drain inverter is used to drive a low voltage relay coil as shown in Figure 8-1. The high drive strength of the SN74AC16-Q1 allows direct driving of the relay coil. When the open-drain output of the device is set to the high-impedance mode, the current from the coil cannot change to zero as fast as the output can, so the output positive clamp diode provides a safe path for that current until it dissipates. A typical coil current and diode current are plotted in Figure 8-2, showing the normal diode current behavior while driving an inductive load.