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Issue A

ML145151

ML145152

ML145155

ML145156

ML145157

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

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

R

÷

÷

÷

÷

OSC

CONTROL LOGIC

N

A

φ

P/P

VCO

OUTPUT

FREQUENCY

EXTERNAL

COMPONENTS