Pin 2: CPU pulse input terminal.
Pin 3: CPU pulse input terminal.
Pin 4: CPU pulse input terminal.
Pin 5: CPU pulse input terminal.
Pin 6: CPU pulse input terminal.
Pin 7: CPU pulse input terminal.
Pin 8: Ground.
Pin 9: This pin is the anode of seven internal freewheeling diodes, and the anode of each diode is connected to the collector of each Darlington tube. When used for inductive load, the pin is connected to the positive pole of the load power supply to realize the free-wheeling function. If this pin is grounded, it is actually the collector of Darlington tube grounded.
10 pin: pulse signal output terminal, corresponding to 7 pin signal input terminal.
1 1 pin: pulse signal output terminal, corresponding to 6 pin signal input terminal.
12 pin: pulse signal output terminal, corresponding to 5 pin signal input terminal.
13 pin: pulse signal output terminal, corresponding to 4 pin signal input terminal.
14 pin: pulse signal output terminal, corresponding to 3 pin signal input terminal.
Pin 15: pulse signal output terminal, corresponding to two pin signal input terminals.
16 pin: pulse signal output end, corresponding to 1 pin signal input end. Extreme electrical characteristics