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MC13110A Datasheet(PDF) 13 Page - Motorola, Inc |
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MC13110A Datasheet(HTML) 13 Page - Motorola, Inc |
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13 / 68 page  MC13110A/B MC13111A/B 13 MOTOROLA ANALOG IC DEVICE DATA PIN FUNCTION DESCRIPTION (continued) Description Equivalent Internal Circuit (52 Pin QFP) Symbol/ Type Pin Description Equivalent Internal Circuit (52 Pin QFP) Symbol/ Type QFP–52 LQFP–48 16 18 C Cap C Cap 18 VCC Audio VCC Audio 40 k C Cap is the compressor rectifier filter capacitor pin. It is recommended that an external filter capacitor to VCC audio be used. A practical capacitor range is 0.1 to 1.0 µF. 0.47 µF is the recommended value. 17 19 C In (Input) C In 19 VCC Audio 12.5 k VB C In is the compressor input. This pin is internally biased and has an input impedance of 12.5 k. C In must be ac–coupled. 18 20 Amp Out (Output) VCC Audio 21 VCC Audio Microphone amplifier output. The gain is set with external resistors. The feedback resistor should be less than 200 k Ω. 19 21 Tx In (Input) Amp Out 20 VB Tx In 21 Tx In is the Tx path input to the microphone amplifier (Mic Amp). An external resistor is connected to this pin to set the Mic Amp gain and input impedance. Tx In must be ac–coupled, too. 20 22 DA In (Input) DA In 22 VCC Audio 250 k 250 k VCC Audio The data amplifier input (DA In) resistance is 250 k Ω and must be ac–coupled. Hysteresis is internally provided. 21 23 VCC Audio VCC audio is the supply for the audio section. It is necessary to adequately filter this pin. 22 24 Rx Audio In (Input) Rx Audio In 24 VCC Audio 600 k VB The Rx audio input resistance is 600 kΩ and must be ac–coupled. 23 25 Det Out (Output) Det Out 25 VCC Audio VCC RF 240 30 µA Det Out is the audio output from the FM detector. This pin is dc–coupled from the FM detector and has an output impedance of 1100 Ω. |
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