Multi-sensing solid state controller mated with its integrated circuit

As shown in the figure, the multi-sensitive solid-state controller is connected to other integrated circuits. Its working principle is that the output state of digital circuits such as CMOS, HCMOS, TTL, LSTTL can directly control the on/off of the multi-sensitive solid-state controller DM. The matching method is as shown in the above (a), (b), and (c). When the control signal is input to the 2nd and 3rd terminals of the controller, the connection of the normally closed circuit is as shown in (b). When the transistor VT has no signal input, the load stops working. Only when the VT is saturated, the DM 3 The terminal is low, and the load RL is energized. The connection of the 2, 3 terminal input control signal of the controller DM to the normally open circuit is as shown in (c). When the triode VT is cut off, the load is energized; when the VT is saturated, its saturation voltage drop is only about 0.3V, so the 2 terminals of the controller DM have no input voltage, and the load RL stops working.