Calling Line Identifier

FX602

© 1998 Consumer Microcircuits Limited

2

D/602/7

CONTENTS

Section

Page

1.0 Features .......................................................................................................... 1

1.1 Brief Description ............................................................................................ 1

1.2 Block Diagram ................................................................................................ 4

1.3 Signal List ....................................................................................................... 5

1.4 External Components .................................................................................... 7

1.5 General Description ....................................................................................... 8

1.5.1 Mode Control Logic ....................................................................... 8

1.5.2 Input Signal Amplifier .................................................................... 8

1.5.3 Bandpass Filter ............................................................................ 10

1.5.4 Level Detector............................................................................... 10

1.5.5 FSK Demodulator ......................................................................... 11

1.5.6 FSK Data Retiming ....................................................................... 11

1.5.7 Tone Alert Detector ...................................................................... 12

1.5.8 Ring or Line Polarity Reversal Detector .................................... 13

1.5.9 Xtal Osc and Clock Dividers ....................................................... 15

1.6 Application Notes......................................................................................... 16

1.6.1 'On-Hook' Operation .................................................................... 16

1.6.2 'Off-Hook' Operation .................................................................... 17

1.7 Performance Specification .......................................................................... 26

1.7.1 Electrical Performance ................................................................ 26

1.7.2 Packaging ..................................................................................... 30