MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
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by MC145106/D
PLL Frequency Synthesizer
CMOS
The MC145106 is a phase–locked loop (PLL) frequency synthesizer
constructed in CMOS on a single monolithic structure. This synthesizer finds
applications in such areas as CB and FM transceivers. The device contains an
oscillator/amplifier, a 210 or 211 divider chain for the oscillator signal, a
programmable divider chain for the input signal, and a phase detector. The
MC145106 has circuitry for a 10.24 MHz oscillator or may operate with an
external signal. The circuit provides a 5.12 MHz output signal, which can be
used for frequency tripling. A 29 programmable divider divides the input signal
frequency for channel selection. The inputs to the programmable divider are
standard ground–to–supply binary signals. Pull–down resistors on these inputs
normally set these inputs to ground enabling these programmable inputs to be
controlled from a mechanical switch or electronic circuitry.
The phase detector may control a VCO and yields a high level signal when
input frequency is low, and a low level signal when input frequency is high. An
out–of–lock signal is provided from the on–chip lock detector with a “0” level for
the out–of–lock condition.
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Single Power Supply
Wide Supply Range: 4.5 to 12 V
Provision for 10.24 MHz Crystal Oscillator
5.12 MHz Output
Programmable Division Binary Input Selects up to 29
On–Chip Pull–Down Resistors on Programmable Divider Inputs
Selectable Reference Divider, 210 or 211 (Including
÷
2)
Three–State Phase Detector
See Application Note AN535 and Article Reprint AR254
Chip Complexity: 880 FETs or 220 Equivalent Gates
See the MC145151–2 and MC145152–2 for Higher Performance and
Added Flexibility
18
MC145106
P SUFFIX
PLASTIC DIP
CASE 707
1
20
1
DW SUFFIX
SOG PACKAGE
CASE 751D
ORDERING INFORMATION
MC145106P
MC145106DW
Plastic DIP
SOG Package
BLOCK DIAGRAM
OSCout
÷
2out
÷
2
REFERENCE
DIVIDE 29 OR 210
PHASE
DETECTOR
fin
DIVIDE–BY–N COUNTER 29 – 1
LD
FS
φDet
out
OSCin
P0 P1
P2
P3 P4
P5
P6
P7 P8
REV 3
1/98
©
Motorola, Inc. 1998
MC145106
MOTOROLA
1
MOTOROLA [ MOTOROLA, INC ]
