Table Of Contents - Epson S1C05251 Technical Manual

Cmos calling number identification receiver ic

Table of Contents

1 Overview .......................................................................................................................1

1.1 Features ......................................................................................................................................................................1

1.2 Block Diagram...........................................................................................................................................................2

1.3 Pin Assignment.........................................................................................................................................................2

1.4 Pin Description..........................................................................................................................................................3

2 Power Supply Block and Initial Reset ...........................................................................6

2.1 Power Supply ............................................................................................................................................................6

2.2 Initial Reset.................................................................................................................................................................6

3 Functional Description ..................................................................................................7

3.1 Register Description................................................................................................................................................7

3.2 Outputs from the #RDET, #IRQ and #DET Pins.......................................................................................12

3.3 Input Amp Circuit...................................................................................................................................................13

3.3.1 Differential Input ..................................................................................................................................13

3.3.2 Single End Input .................................................................................................................................14

3.4 Ring/Line Reversal Signal Detection.............................................................................................................15

3.5 FSK Demodulation ...............................................................................................................................................15

3.6 Dual-Tone Detection............................................................................................................................................16

3.7 Off-Hook Detection...............................................................................................................................................16

4 Precautions on Mounting ............................................................................................ 17

5 Electrical Characteristics ............................................................................................ 19

5.1 Absolute Maximum Ratings ..............................................................................................................................19

5.2 Recommended Operating Conditions...........................................................................................................19

5.3 DC Characteristics................................................................................................................................................19

5.4 Current Consumption...........................................................................................................................................19

5.5 Crystal Oscillation Characteristics...................................................................................................................20

5.6 FSK Demodulation Circuit Characteristics...................................................................................................20

5.6.1 FSK AC Characteristics....................................................................................................................20

5.6.2 FSK Switching Characteristics.......................................................................................................20

5.6.3 FSK Energy Detection Mode AC Characteristics...................................................................21

5.6.4 FSK Energy Detection Mode Switching Characteristics......................................................21

5.7 Dual-Tone (CAS) Detection Circuit Characteristics.................................................................................22

5.7.1 CAS AC Characteristics...................................................................................................................22

5.7.2 CAS Switching Characteristics......................................................................................................22

5.8 Call Progress Mode (CPM) Detection Circuit Characteristics..............................................................23

5.8.1 CPM AC Characteristics...................................................................................................................23

5.8.2 CPM Switching Characteristics......................................................................................................23

5.9 Serial Interface Circuit Characteristics..........................................................................................................24

5.9.1 Serial Interface AC Characteristics..............................................................................................24

5.9.2 FSK Demodulated Data Read Mode ..........................................................................................25

5.9.3 CAS Detection Circuit Control-Register Write Mode.............................................................25

5.10 S1C05251 Timing Chart...................................................................................................................................26

5.10.1 Bellcore On-Hook Data Transfer................................................................................................26

5.10.2 Bellcore Off-Hook Data Transfer................................................................................................26

5.10.3 BT Idle State CLI Service .............................................................................................................27

5.10.4 BT Loop State CLI Service ..........................................................................................................27

S1C05251 TECHNICAL MANUAL

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Table Of Contents - Epson S1C05251 Technical Manual

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