AD724,pdf datasheet (PAL Encod

The AD724 was designed to have three allowable modes of

applying a clock via the FIN pin. These are FSC (frequency of

subcarrier) mode with CMOS clock applied, FSC mode using

on-chip crystal oscillator, and 4FSC mode with CMOS clock

applied. The FSC frequency is 3.579545 MHz for NTSC or

4.433618 MHz for PAL.

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