Servo control pin drive current?

[Kaptah]

Has someone measured the PWM input pin resistance or the current to the servo control pin, when driving the servo with for example 5V logic high signal?

I need this information to detemine the needed voltage level shifter circuit for the servo control of a typical RC servo.

[Tom Harper]

Never measured it, but it's signal level stuff - should be very small.

Tom

[Kaptah]

Ok, thanks. I was just thinking whether a 4.7k ohm pull-up resistor is enough to reliably generate the logic high state. An NPN transistor would then act as a pull-down.

[Tom Harper]

I use 10K with no problems.