TDA8501T 查看數據表（PDF） - Philips Electronics

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TDA8501T

PAL/NTSC encoder

Philips Electronics 

Philips Semiconductors

PAL/NTSC encoder

Preliminary specification

TDA8501

SYMBOL

PIN

DESCRIPTION

PAL/NTSC and

Y/Y + SYNC

NOTCH

Y +SYNC OUT

Y +SYNC IN

BURST ADJ

Y +SYNC OUT

OSC

CS

17 four level control pin (note 2)

18 Y +SYNC output via an internal resistor of 2 kΩ; a notch filter can be connected to this pin

19 2 V (p-p) nominal Y +SYNC output

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

21 burst current adjustment via external resistor

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

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

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

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

is connected to VCC.

2. The listed voltages connected to pin 17 (if VCC = + 5 V) enable the following Y (via pin 5) input signal states:

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

April 1993

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