Pin details of IC KA 2102A

Pin details of IC KA 2102A

Substitute : µPC 1353C


Funtions :

  1. Sound if and audio output
  2. FM detector
  3. Electronic attenuator
Pin No Function Voltage
1. Sqelch 9.8
2. FM detector coil 4.8
3. Electronic attenuator(decoupling capacitor) 5.9
4. Detected audio signal output from FM detector 5.2
5. Supply for sound IF section 8.4
6. Decoupling capacitor(for improving sound quality) 7.9
7. Detected audio signal input 3.8
8. Audio signal output to speaker 7.8
9. Bootstrap capacitor (to improve sound quality) 15.8
10. Positive supply(+Ve)for audio section 19.3
11. Feedback circuit(output to input)to improve sound quality 7.8
12. Sound IF signal input(Hot end)(5.5MHz.) 2.4
13. Sound IF signal input(Cold end)(5.5MHz.) 2.4
14. Volume control (electronic attenuator) 0.1



 
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