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L64733 Datasheet(PDF) 9 Page - LSI Computer Systems |
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L64733 Datasheet(HTML) 9 Page - LSI Computer Systems |
9 / 48 page L64733/L64734 Tuner and Satellite Receiver Chipset 9 The following signal descriptions are listed according to the major interface groups. Within each group, the signals are described in alphabetic order. RF Signals The L64733 can accept an RF input signal and loop it through to RFOUT. This is controlled by an on-chip RF switch. RFINn, RFINp RF Input Input The RFIN differential signals form the 75 Ω input. Connect the RFINp signal through a series 100 pF capacitor to a 75 Ω F video connector and the RFINn signal through a series 75 Ω resistor and 100 pF capacitor to ground. RFOUT RF Output Output The RFOUT signal is a 75 Ω output that is active when the INSEL input is deasserted. When active, the signal at RFOUT is a copy of the RFIN signal. Oscillator Signals The L64733 has two internal oscillators: a crystal oscillator and a tank oscillator. CFLT Bias Voltage Bypass Bidirectional See Figure 7 on page 22 for information on how to connect the CFLT pin. TANKn, TANKp Oscillator Tank Port Input See Figure 7 on page 22 for information on how to connect the TANKp and TANKn pins. VRLO Local Oscillator Regulator Bypass Bidirectional See Figure 7 on page 22 for information on how to connect the VRLO pin. XTLn, XTLp Crystal Oscillator Port Input Connect the XTLp and XTLn pins as shown in Figure 7 on page 22. |
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