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.
Crystal Oscillator Port
Input
Connect the XTLp and XTLn pins as shown in
Figure 7
on
page 22.
XTLn, XTLp
L64733/L64734 Tuner and Satellite Receiver Chipset
9
LSI [ LSI COMPUTER SYSTEMS ]
