N681622YG Nuvoton Technology Corporation of America, N681622YG Datasheet - Page 15

• Manufacturer Part Number: N681622YG
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of N681622YG

• Lead Free Status / RoHS Status: Supplier Unconfirmed

7.
Figure 1: N681386/87 Pin Configuration ........................................................................................................................ 2
Figure 2: N681622 Subscriber Line Feed Circuit (SLFC) Pin Configuration .................................................................. 3
Figure 3: N681386/87 Block Diagram ............................................................................................................................ 7
Figure 4: AC signal Path .............................................................................................................................................. 25
Figure 5: DC Feed Regions ......................................................................................................................................... 26
Figure 6: Line Loop Control .......................................................................................................................................... 27
Figure 7: Example State Diagram ................................................................................................................................ 30
Figure 8: Block Diagram Oscillator 1 ............................................................................................................................ 38
Figure 9: Zero Crossing for Tone Generation .............................................................................................................. 39
Figure 10: Trapezoidal Ringing .................................................................................................................................... 42
Figure 11: Positive DC offset for Trapezoidal Ringing .................................................................................................. 43
Figure 12: Programming V
Figure 13: Unbalanced Ringing on TIP ........................................................................................................................ 44
Figure 14: RING Trip Detection Mechanism ................................................................................................................ 45
Figure 15: Loop Closure Detector Block Diagram ........................................................................................................ 47
Figure 16: Ground Key Detection Circuitry ................................................................................................................... 49
Figure 17: The Architecture of Linear FSK Waveform Generator................................................................................. 50
Figure 18: DTMF Detector - Functional Block Diagram ................................................................................................ 53
Figure 19: Characteristic Line Impedance .................................................................................................................... 56
Figure 20: Diagnostics Support Block Diagram ............................................................................................................ 59
Figure 21: Voltage Tracking in Forward Active State ................................................................................................... 61
Figure 22: Dynamic Battery Target .............................................................................................................................. 61
Figure 23: Three Voltage External Battery switching ................................................................................................... 62
Figure 24: Two Battery Supply Control Circuit ............................................................................................................. 62
Figure 25: Wideband 8kHz Frame Sync PCM interface ............................................................................................... 66
Figure 26: Wideband 16kHz Frame Sync PCM interface ............................................................................................. 67
Figure 27: Register write operation through a 8-bit SPI port ........................................................................................ 70
Figure 28: Register read operation through a 8-bit SPI port ......................................................................................... 70
Figure 29: Register write operation through a 16-bit SPI port ...................................................................................... 70
Figure 30: Register read operation through a 16-bit SPI port ....................................................................................... 70
Figure 31: Three Chip Daisy Chain connection ............................................................................................................ 71
Figure 32: Device/Register Address for Three Device Daisy Chain application ........................................................... 71
Figure 33: DATA for Three Device Daisy Chain application ......................................................................................... 72
Figure 34: Burst mode operation (BST=1) ................................................................................................................... 72
Figure 35: SPI 12-bits Read sequence ........................................................................................................................ 74
Figure 36: N681622 Equivalent Internal diagram ......................................................................................................... 76
Figure 37: PCM Timing for Non-GCI .......................................................................................................................... 141
Preliminary Datasheet Rev1.0
LIST OF FIGURES
CMR
voltage for Trapezoidal Ringing ................................................................................... 43
Page 15 of 164
Single Programmable Extended Codec/SLCC
N681386/87
January 2010