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| MC13028A |
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 MOTOROLA
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5 page 
MC13028A 5 MOTOROLA ANALOG IC DEVICE DATA PIN FUNCTION DESCRIPTION Description/External Circuit Requirements Internal Equivalent Circuit Symbol Pin 10 QPilot 10 5.0 k VCC Pilot Q Detector Output This pin is connected to the Pilot Q detector and requires a 0.47 µF capacitor to ground to filter the error line voltage at the PLL pilot tone detector. If the value of this capacitor is made too large, the decoder may be prevented from coming back into stereo after a signal drop out has been experienced in the field. The force to mono function is also accomplished at this pin by pulling the dc voltage level at the pin below 1.0 V. 11 PILOTfil VCC 2.0 k 11 VCC 30 k Pilot Signal Input A capacitor to ground forms a filter for the pilot input signal. The recommended value of the capacitor is 0.22 µF. The dc level at Pin 11 is approximately 1.0 Vdc. 12 VCC 12 VCC VCC Supply Voltage (VCC) The operating supply voltage range is from 1.8 Vdc to 12 Vdc. 13 OSCin Vreg 15 k 3.0 k 13 Vreg 3.1 k 6.3 pF 2.2 k Oscillator Input The oscillator pin requires a ceramic resonator and parallel capacitor connected to ground. The recommended source for the ceramic resonator is Murata, part number CSA 3.60MGF108. A 43 pF NPO capacitor is in parallel with the resonator. The dc level at Pin 13 is approximately 1.1 Vdc. |
