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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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UPD178024GC-051 Fiches technique(PDF) 10 Page - NEC |
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UPD178024GC-051 Fiches technique(HTML) 10 Page - NEC |
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10 / 98 page  Data Sheet U14608EJ1V0DS00 10 µµµµPD178024GC-051 Pin No. Symbol Pin Name Description I/O Type 31 VCOH FM local oscillation input This pin inputs the local oscillation output (VCO) of the FM band. Because it is connected to an internal AC amplifier, connect a capacitor to this pin in series to cut off the DC component. The voltage on this pin is at the intermediate level (about 1/2VDD) during auto tuning of the FM band, but at all other times the pin goes into a high-impedance state. Input 32 VCOL AM local oscillation input This pin inputs the local oscillation output (VCO) of the AM band (MW, LW). Because it is connected to an internal AC amplifier, connect a capacitor to this pin in series to cut off the DC component. The voltage on this pin is at the intermediate level (about 1/2VDD) during auto tuning of the AM band (MW, LW), but at all other times the pin goes into a high-impedance state. Input 33 GNDPLL PLL ground Ground pin for PLL. Connect this pin to the GND pin. − 34 35 EO0 EO1 Error out These pins are the output pins of the charge pump of the phase comparator that constitutes the PLL. Input the output signals from these pins to an external LPF (Low Pass Filter), and apply them to a varacter diode via the LPF. If the divided local oscillation frequency (VCO output) is higher than the reference frequency, these pins output a high level; if this frequency is lower than the reference frequency, they output a low level. If the frequency matches, these pins are floated. CMOS 3-state output 36 IC Internally connected This pin is internally connected. Directly connect this pin to the GND pin with as short a wiring length as possible. If noise is superimposed on this pin, it may cause the device to malfunction. − 37 LOC Local signal output This pin outputs the local signal of the radio. This pin outputs a high level during auto tuning in the local mode. At all other times, it outputs a low level. CMOS push-pull output This pin inputs a stereo signal. Input a signal to this pin as follows: STEREO Pin Description 0 Stereo broadcasting being received 1 Stereo broadcasting not received (0: Low level, 1: High level) 38 STEREO Stereo signal input The stereo signal is ignored unless the FM band is being received. Input Outputs a loudness signal. This pin outputs a signal as follows in the power-on status, depending on the loudness status. LOUD Pin Loudness Status 0 Loudness on 1 Loudness off (0: Low level, 1: High level) 39 LOUD Loudness signal output At all other times, this pin outputs a high level. CMOS push-pull output |
Numéro de pièce similaire - UPD178024GC-051 |
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Description similaire - UPD178024GC-051 |
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