Substitute: TDA1190, TDA 3190
Functions:
- IF limiter amplifier
- Aktive low pass filter
- FM detector
- D.C volume control
- AF ppre-amplifier
- AF output stage
| Pin No. | Functions | Voltage |
| 1. | IF amplifier input(sound IF input) | 2.5 |
| 2. | IF decoupling capacitor for IF amplifier | 2.5 |
| 3. | IF decoupling capacitor | 2.5 |
| 4. | FM detector capacitor (tank circuit ) | 2 |
| 5. | FM detector capacitor (tank circuit ) | 2 |
| 6. | DC volume control(electronic attenuator ) | 2 |
| 7. | Audio frequency feedback | 10 |
| 8. | Conpensation for soun quality | 0.2 |
| 9. | Audiio frequency output | 10 |
| 10. | Positive(+Ve)supply voltage(Vcc) | 24 |
| 11. | Rippley rejection | 10 |
| 12. | De-emphasis (Frequency attenuator) | 2.5 |