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LANSDALE Semiconductor |
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ML145151 ML145156
ML145152 ML145157
ML145155 ML145158
PLL Frequency Synthesizer Family - CMOS
The devices described in this document are typically used as low–power, phase–locked loop frequency
synthesizers. When combined with an external low–pass filter and voltage–controlled oscillator, these
devices can provide all the remaining functions for a PLL frequency synthesizer operating up to the
device's frequency limit. For higher VCO frequency operation, a down mixer or a prescaler can be used
between the VCO and the synthesizer IC.
These frequency synthesizer chips can be found in the following and other applications:
CATV
TV Tuning
AM/FM Radios
Scanning Receivers
Two–Way Radios
Amateur Radio
OSC ÷R
CONTROL LOGIC
φ
÷ A ÷N
÷ P/P + 1
VCO
OUTPUT
FREQUENCY
EXTERNAL
COMPONENTS
CONTENTS
Page
DEVICE DETAIL SHEETS
ML145151 Parallel–Input, Single–Modulus ...........................................................................................2
ML145152 Parallel–Input, Dual–Modulus..............................................................................................5
ML145155 Serial–Input, Single–Modulus ..............................................................................................9
ML145156 Serial–Input, Dual–Modulus...............................................................................................13
ML145157 Serial–Input, Single–Modulus ............................................................................................17
ML145158 Serial–Input, Dual–Modulus...............................................................................................20
FAMILY CHARACTERISTICS
Maximum Ratings..................................................................................................................................23
DC Electrical Characteristics.................................................................................................................23
AC Electrical Characteristics.................................................................................................................25
Timing Requirements.............................................................................................................................26
Frequency Characteristics ......................................................................................................................27
Phase Detector/Lock Detector Output Waveforms................................................................................27
DESIGN CONSIDERATIONS
Phase–Locked Loop – Low–Pass Filter Design ....................................................................................28
Crystal Oscillator Considerations ..........................................................................................................29
Dual–Modulus Prescaling......................................................................................................................30
Page 1 of 35
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Issue A
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ML145151
Parallel-Input PLL
Frequency Synthesizer
Interfaces with Single–Modulus Prescalers
Legacy Device: Motorola/Freescale MC145151
The ML145151 is programmed by 14 parallel–input data
lines for the N counter and three input lines for the R counter.
The device features consist of a reference oscillator, selec-
table–reference divider, digital–phase detector, and 14–bit
programmable divide–by–N counter.
• Operating Temperature Range: TA = – 40 to 85°C
• Low Power Consumption Through Use of CMOS
Technology
• 3.0 to 9.0 V Supply Range
• On– or Off–Chip Reference Oscillator Operation
• Lock Detect Signal
• ÷ N Counter Output Available
• Single Modulus/Parallel Programming
• 8 User–Selectable ÷ R Values: 8, 128, 256, 512, 1024,
2048, 2410, 8192
• ÷ N Range = 3 to 16383
• “Linearized” Digital Phase Detector Enhances Transfer
Function Linearity
• Two Error Signal Options: Single–Ended (Three–State)
or Double–Ended
• Chip Complexity: 8000 FETs or 2000 Equivalent Gates
28
1
P DIP 28 = YP
PLASTIC DIP
CASE 710
28
1
SO 28W = -6P
SOG PACKAGE
CASE 751F
CROSS REFERENCE/ORDERING INFORMATION
PACKAGE
MOTOROLA
LANSDALE
P DIP 28
SO 28W
MC145151P2 ML145151YP
MC145151DW2 ML145151-6P
Note: Lansdale lead free (Pb) product, as it
becomes available, will be identified by a part
number prefix change from ML to MLE.
PIN ASSIGNMENT
fin
VSS
VDD
PDout
RA0
1
2
3
4
5
RA1 6
RA2 7
φR 8
φV 9
fV 10
N0 11
N1 12
N2 13
N3 14
28 LD
27 OSCin
26 OSCout
25 N11
24 N10
23 N13
22 N12
21 T/R
20 N9
19 N8
18 N7
17 N6
16 N5
15 N4
Page 2 of 35
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Issue A
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