April 1993

5

Philips Semiconductors

Preliminary specification

PAL/NTSC encoder

TDA8501

Notes

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.

Pin 4: in NTSC mode, for internal set-up this pin is connected to ground; when internal set-up is switched off, this pin

0 V = PAL mode; at pin 5, Y without sync and input blanking on

5 V = NTSC mode; at pin 5, Y without sync and input blanking on

1.8 V = PAL mode; at pin 5, Y with sync and input blanking off

3.2 V = NTSC mode; at pin 5, Y with sync and input blanking off

PAL/NTSC and

Y/Y

+ SYNC

17

four level control pin (note 2)

NOTCH

18

Y +SYNC output via an internal resistor of 2 k

Ω; a notch filter can be connected to this pin

Y +SYNC OUT

19

2 V (p-p) nominal Y +SYNC output

Y +SYNC IN

20

Y +SYNC input; (from pin 22) connected to the output of the external delay line

BURST ADJ

21

burst current adjustment via external resistor

Y +SYNC OUT

22

Y +SYNC output 1 V (p-p) nominal, connected to the input of the external delay line

OSC

23

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

CS

24

composite sync input, 0.3 V (p-p) nominal

SYMBOL

PIN

DESCRIPTION