Pin Details of IC TDA1940 and Pin Details of IC TDA1950
Functions :- Sync separator
- Phase comprator or AFC
- Voltage controlled horizontal oscillator
- Bar horizontal output (Pre-amplifier)
- Send castle pulse generator
- Muting circuit
| Pin No. | Function | Voltage |
| 1. | Ground(-Ve supply voltage) | 0 |
| 2. | Horizontal drive pulse output(15625Hz) | 1.8 |
| 3. | Flyback(Reference)pulse input from EHT(15625 Hz) | 11 |
| 4. | Sand castle pulse output | 1.8 |
| 5. | Switch over input VCR operation | 2 |
| 6. | Output of time constant switching stage for phase comprator-1 | - |
| 7. | Muting output (sound) | 0.7 |
| 8. | Reference pin vertical sync separator | 6 |
| 9. | Vertical sync output (50Hz) | 1.5 |
| 10. | Video porch clamp level | 3.8 |
| 11. | Sync separator input | 3 |
| 12. | Horizontal frequency adjust (15625 Hz) | 7.3 |
| 13. | Out phase comparator | 6 |
| 14. | Positive supply (+Ve terminal) | 12 |
| 15. | Horizontal oscillator capacitor(15625Hz) | 6 |
| 16. | Horizontal oscillator resistor(15625 Hz) | 6.1 |
| 17. | Phase shift (phase correction input) | 5.3 |
| 18. | Vertical flyback (blanking) pulse input(50Hz) | -6.5 |
