TDA8501
Description
Y +SYNC output via an internal resistor of 2 kΩ; a notch filter can be connected to this pin 2 V (p-p) nominal Y +SYNC output Y +SYNC input; (from pin 22) connected to the output of the external delay line burst current adjustment via external resistor Y +SYNC output 1 V (p-p) nominal, connected to the input of the external delay line oscillator tuning: connected to either a crystal in series with capacitor to ground, or to an external frequency source via a resistor in series with a capacitor posite sync input, 0.3 V (p-p) nominal 1. Pin 4: in PAL mode, if not connected to external H2 pulse, this pin is the output for the internally generated H/2 signal.
Key Features
- Two input stages: R, G, B and -(R-Y), -(B-Y), Y with multiplexing
- Fully controlled modulator produces a signal according to the PAL or NTSC standard without adjustments
- A free running oscillator. Can be tuned by crystal or by an external frequency source
- Sync separator circuit and pulse shaper, to generate the required pulses for the processing, clamping, blanking, FH/2, and burst pulse
- H/2 control pin. In PAL mode the internally generated H/2 is connected to this pin and the phase of this signal can be reset
