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MC13109A Datasheet(PDF) 12 Page - Motorola, Inc |
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MC13109A Datasheet(HTML) 12 Page - Motorola, Inc |
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12 / 28 page  MC13109A 12 MOTOROLA RF/IF DEVICE DATA PIN FUNCTION DESCRIPTION 48–TQFP Pin 52–QFP Pin Symbol Type Description 1 2 1 2 LO2 In LO2 Out – 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. 3 3 PLL Vref Supply Voltage Regulator output pin. The 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 the other IC’s. 4 4 Rx PD Output Three state voltage output of the Rx Phase Detector. This pin 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 reference frequency are present. This pin drives the external Rx PLL loop filter. It is important to minimize the line length and capacitance of this pin. 5 5 Gnd PLL Gnd Ground pin for PLL section of IC. 6 6 Tx PD Output Three state voltage output of the Tx Phase Detector. This pin 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 reference frequency are present. This pin drives the external Tx PLL loop filter. It is important to minimize the line length and capacitance on this pin. 7 7 E Cap – Expander rectifier filter capacitor pin. Connect capacitor to VCC. 8 8 Tx VCO Input Transmit divide counter input which is driven by an ac coupled external transmit loop VCO. The minimum signal level is 200 mVpp @ 80.0 MHz. This pin also functions as the test mode input for the counter tests. 9 10 11 9 10 11 Data EN Clk Input Microprocessor serial interface input pins for programming various counters and control functions. 12 12 Clk Out Output Microprocessor Clock Output which is derived from the 2nd LO crystal oscillator and a programmable divider. It can be used to drive a microprocessor and thereby reduce the number of crystals required in the system design. The driver has an internal resistor in series with the output which can be combined with an external capacitor to form a low pass filter to reduce radiated noise on the PCB. This output also functions as the output for the counter test modes. N/A 14 Status Out Output This pin indicates when the internal latches may have lost memory due to a power glitch. 13 15 CD Out/ Hardware Interrupt Output/ Input Dual function pin; 1) Carrier detect output (open collector with external 100 k Ω pull–up resistor. 2) Hardware interrupt input which can be used to “wake–up” from Inactive Mode. 14 16 BD Out Output Low battery detect output (open collector with external pull–up resistor). 15 17 DA Out Output Data amplifier output (open collector with internal 100 k Ω pull–up resistor). 16 18 SA Out Output Speaker amplifier output. 17 19 SA In Input Speaker amplifier input (ac coupled). 18 20 E Out Output Expander output. 19 21 VCC Audio Supply VCC supply for audio section. 20 22 DA In Input Data amplifier input (ac coupled). 21 23 Pre–Amp Out Output Pre–amplifier output for connection of pre–amplifier feedback resistor. 22 24 Rx Audio In Input Rx audio input to pre–amplifier (ac coupled). 23 25 Det Out Output Audio output from FM detector. 24 26 RSSI – Receive signal strength indicator filter capacitor. N/A 27 N/A – Not used. 25 28 Q Coil – A quad coil or ceramic discriminator are connected to this pin. 26 29 VCC RF Supply VCC supply for RF receiver section. 27 28 30 31 Lim C2 Lim C1 – IF amplifier/limiter capacitor pins. |
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