Datasheet
MC33411A/B
15
MOTOROLA RF/IF DEVICE DATA
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PIN FUNCTION DESCRIPTION (continued)
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Description
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Description
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Symbol/Type
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Pin
43, 45 LO2+, LO2–
LO2+
43
LO2
V
CC
LO2
V
CC
The 2nd LO. External tank components are
required. The internal capacitance across the pins
is adjustable from 0 to 7.6 pF for fine tuning
performance with bits 7/20–18.
44 LO2 Ctl
(Input)
LO2–
45
LO2 Ctl
44
LO2
V
CC
55 k
LO2 Control is the dc control input for this VCO.
Typically it is the output of the low–pass filter fed
from the phase detector output.
46 LO2 Gnd Ground pin for the LO2 section. A direct connection
to a ground plane is strongly recommended.
47 LO2PD
(Output)
LO2 PD
47
100/
400 µA
LO2 PLL V
CC
100/
400 µA
LO2
PLL
V
CC
125
125
to Filter
LO2 Phase Detector Output. The output either
sources or sinks current, or neither, depending on
the phase difference of the phase detector input
signals. During lock, very narrow pulses with a
frequency equal to the PLL reference frequency are
present. Output current is either ±100 µA or
±400 µA, selectable with bit 3/14.
48 LO2 Gnd Ground pin for the LO2 section. A direct connection
to a ground plane is strongly recommended.
NOTE: 1. All V
CC
pins must be within ±0.5 V of each other.
ARCHIVE INFORMATION
ARCHIVE INFORMATION
Fr
eescale S
emiconduct
or
, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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