Xr2206 Pin Diagram. The frequency range is 1hz to 1mhz. Fsk keying level pin 9 0 8 1 4 2 4 0 8 1 4 2 4 v see section on circuit controls reference bypass voltage 2 9 3 1 3 3 2 5 3 3 5 v measured at pin 10.
The figure below shows the circuit diagram recommended by exar around the xr2206cp. The ic contains a voltage controlled oscillator vco whose frequency is determined by a capacitor between pins 5 and 6 and two resistors to ground on pins 7 and 8. This vco drives an open collector transistor of which the collector is available on pin 11.
And can be adjusted by vr3.
Fsk keying level pin 9 0 8 1 4 2 4 0 8 1 4 2 4 v see section on circuit controls reference bypass voltage 2 9 3 1 3 3 2 5 3 3 5 v measured at pin 10. The chip is advertised to work down to 0 01 hz. Reducing r to 2k gave an ideal 20 ms period or 50 hz. Xr2206 datasheet xr2206 pdf xr2206 data sheet xr2206 manual xr2206 pdf xr2206 datenblatt electronics xr2206 alldatasheet free datasheet datasheets data.
