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IDT82V1671

CHIPSET OF RINGING SUBSCRIBER LINE INTERFACE CIRCUIT (RSLIC) & QUAD PROGRAMMABLE PCM CODEC

Integrated Device Technology 

RSLIC (IDT82V1671) & CODEC (IDT82V1074) CHIPSET

INDUSTRIAL TEMPERATURE RANGE

LIST OF FIGURES

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Line Circuit Functions Included in the RSLIC-CODEC Chipset ........................................................................................................ 16

DC Feeding Zones ............................................................................................................................................................................ 17

Constant Current Zone...................................................................................................................................................................... 17

Resistive Zone................................................................................................................................................................................... 17

Constant Voltage Zone...................................................................................................................................................................... 18

DC Feeding Characteristics Configuration ........................................................................................................................................ 18

DC Feeding Configuration Example for Short Loop Applications...................................................................................................... 18

Signal Paths for AC Transmission..................................................................................................................................................... 20

Voice Signal Path of the CODEC ...................................................................................................................................................... 20

Nyquist Diagram................................................................................................................................................................................ 21

Internal Balanced Ringing ................................................................................................................................................................. 23

External Ringing Synchronization ..................................................................................................................................................... 25

Hysteresis for Off-Hook Detection..................................................................................................................................................... 27

Debounce Filter for Off-hook/Ground-key Detection ......................................................................................................................... 28

FSK Signal Transmission Sequence................................................................................................................................................. 31

Recommended Programming Flow Chart for FSK Generation ......................................................................................................... 33

UTD Functional Diagram................................................................................................................................................................... 34

Example of UTD Recognition Timing ................................................................................................................................................ 35

Example of UTD Tone End Detection Timing ................................................................................................................................... 35

Conference Block Diagram ............................................................................................................................................................... 37

Level Meter Block Diagram ............................................................................................................................................................... 41

Continuous Measurement Sequence (AC & DC Level Meter) .......................................................................................................... 42

Single Measurement Sequence (AC & DC Level Meter) .................................................................................................................. 42

Example for Resistance Measurement ............................................................................................................................................. 46

Differential Resistance Measurement ............................................................................................................................................... 46

Capacitance Measurement ............................................................................................................................................................... 47

External Voltage Measurement Principle .......................................................................................................................................... 48

MPI Read Operation Timing.............................................................................................................................................................. 50

MPI Write Operation Timing .............................................................................................................................................................. 50

PCM Clock Slope Select Waveform.................................................................................................................................................. 51

Compressed GCI Frame Structure.................................................................................................................................................... 53

Linear GCI Frame Structure .............................................................................................................................................................. 54

Monitor Channel Operation ............................................................................................................................................................... 56

State Diagram of the Monitor Transmitter ......................................................................................................................................... 57

State Diagram of the Monitor Receiver ............................................................................................................................................. 58

Waveform of Programming Example: Writing to Local Registers ..................................................................................................... 83

Waveform of Programming Example: Reading Local Registers ....................................................................................................... 83

RSLIC Mode Control Signaling ......................................................................................................................................................... 87

RSLIC Control Timing Diagram......................................................................................................................................................... 88

RSLIC Internal Test Circuit................................................................................................................................................................ 89

IO Debounce Filter ............................................................................................................................................................................ 90

AC/DC Signal Path and Test Loopbacks .......................................................................................................................................... 92

Clock Timing...................................................................................................................................................................................... 99

MPI Input Timing ............................................................................................................................................................................. 100

MPI Output Timing .......................................................................................................................................................................... 100

PCM Interface Timing (Single Clock Mode) .................................................................................................................................... 101

PCM Interface Timing (Double Clock Mode)................................................................................................................................... 102

GCI Interface Timing ....................................................................................................................................................................... 103

Application Circuit for the Internal Ringing Mode ............................................................................................................................ 104

Application Circuit for the External Ringing Mode ........................................................................................................................... 105

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