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MC13110A Datasheet(PDF) 11 Page - Motorola, Inc |
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MC13110A Datasheet(HTML) 11 Page - Motorola, Inc |
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11 / 68 page  MC13110A/B MC13111A/B 11 MOTOROLA ANALOG IC DEVICE DATA PIN FUNCTION DESCRIPTION Pin Symbol/ E i l I l Ci i (52 Pi QFP) Di i LQFP–48 QFP–52 Symbol/ Type Equivalent Internal Circuit (52 Pin QFP) Description 48 1 1 2 LO2 In LO2 Out LO2 Out 2 LO2 In 1 PLL Vref PLL Vref 100 100 PLL Vref These pins form the PLL reference oscillator when connected to an external parallel–resonant crystal (10.24 MHz typical). The reference oscillator is also the second Local Oscillator (LO2) for the RF receiver. “LO2 In” may also serve as an input for an externally generated reference signal which is typically ac–coupled. When the IC is set to the inactive mode, LO2 In is internally pulled low to disable the oscillator. The input capacitance to ground at each pin (LO2 In/ LO2 Out) is 3.0 pF. 2 3 Vag Vag 3 PLL Vref VCC Audio 30 k Vag is the internal reference voltage for the switched capacitor filter section. This pin must be decoupled with a 0.1 µF capacitor. 3 4 Rx PD (Output) 46 PLL Vref PLL Vref 15 This pin is a tri–state voltage output of the Rx and Tx Phase Detector. It is either “high”, “low”, or “high impedance,” depending on the phase difference of the phase detector input signals. During lock, very narrow pulses with a frequency equal to the 5 6 Tx PD (Output) Rx PD, Tx PD 4, 6 15 narrow pulses with a frequency equal to the reference frequency are present. This pin drives the external Rx and Tx PLL loop filters. Rx and Tx PD outputs can sink or source 1.0 mA. 4 5 PLL Vref PLL Vref 5 132 k VCC Audio PLL Vref is a PLL voltage regulator output pin. An internal voltage regulator provides a stable power supply voltage for the Rx and Tx PLL’s and can also be used as a regulated supply voltage for other IC’s. It can source up to 1.0 mA externally. Proper supply filtering is a must on this pin. PLL Vref is pulled up to VCC audio for the standby and inactive modes (Note 1). 6 7 Gnd PLL Ground pin for digital PLL section of IC. 7 8 Tx VCO (Input) T X VCO 8 PLL Vref 1.0 k PLL Vref Tx VCO is the transmit divide counter input which is driven by an ac–coupled external transmit loop VCO. The minimum signal level is 200 mVpp @ 60.0 MHz. This pin also functions as the test mode input for the counter tests. |
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Similar Description - MC13110A |
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