SL323 level drive display circuit and pin arrangement

This circuit uses fluorescent indicator tube display. Its purpose is the same as the SL322C circuit.
    Circuit features:
    ① The operating voltage range is 12 -20V;
    ② It can directly drive fluorescent level display tubes, and its driving voltage interval remains linear (0.7V).
    Main electrical parameters: Maximum power supply voltage is 24V; power supply current ≤ImA (input is zero) and ≤40mA (input
is 5.5V); lighting level ≤lV (the first line is on) and ≤5.5V (all ten lines are on) ); the input impedance is 20kn.
    The SL323 level drive display circuit and pin arrangement are as shown in the figure