Pin Details of IC TDA 2577A

Pin Details of IC TDA 2577A
Functions :

1. Horizontal sync separator
2. Noise Invertor
3. Horisontal oscillator & drive
4. Horisontal phase Detector
5. Vertical oscillator
6. Sand-Castle Pulse Generator
7. Vertical Sync Separator & Vertical Driver
8. Vertical blangking generator

Pin No.	Function	Voltage
1.	Vertical output (50 Hz.)	3.4
2.	Vertical feedback (output to input)	3.5
3.	Vertical frequency adjust (50 Hz.)(V-Hold)	5.6
4.	Vertical sync separator (50 Hz.)	2.4
5.	Video input to sync separator	3
6.	Horizontal sync separator (15625 Hz.)	6.6
7.	Horizontal sync separator (15625 Hz.)	5.8
8.	Phase detector1 output	3
9.	Ground (-Ve supply voltage)	0
10.	Positive (+ Ve supply voltage )	12
11.	Horizontal frequency out (15625 Hz.)	3.2
12.	Horizontal flyback pulse input (15625 Hz.)	0.4
13.	Video transmitter identification / VCR switch	11
14.	Phase detector 2 output	3.7
15.	Horizontal oscillator frequency (15625 Hz.) adjustment (H-Hold)	4.4
16.	Horizontal oscillator start supply circuit	9
17.	Sand - castle pulse output	1.4
18.	Coincidence detector	0.6

Pin Details of IC TDA 2540 | TDA 2541

Pin Details of IC TDA 2540 , TDA 2541
( For NPN Tuner )

Substitute : TDA3540 , TDA8340 ,A241D , TDA2541 , TDA8341
Functions :

1. Video IF Amplifier
2. AGC
3. AFC Detector
4. Video Detector

Pin No.	Functions	Voltage
1.	Balance IF input	4.7
2.	Decoupling Capacitor for thr Dc feedback loop of the IF amplifier	4.7
3.	Adjusting pin for starting point of tuner AGC	1.3
4.	Tuner AGC output	3.3
5.	AFT output	5.5
6.	AFT on/off switch	11
7.	AFT circuity to obtain in n/2 phase shift of the reference carrier	3.8
8.	Circuity for passive regeneration of the IF picture carrier	7.9
9.	Circuity for passive regeneration of the IF picture carrier	7.9
10.	AFT circuity to obtain n/2 phase shift of the reference carrier	3
11.	Positive (+Ve)supply voltage (10.2 to 13.2 V;40 to 70mA )	12
12.	Video signal output	4
13.	Ground (-Ve supply voltage )	0
14.	IF AGC , VCR switch	4.7
15.	Decoupling Capacitor for the DC feedback loop of the IF amplifier	2
16.	Balance IF input	2