XRT59L921 Datasheet, PDF (30/32 Pages) Exar Corporation – TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT

XRT59L921
TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT
REV. 1.2.1
FIGURE 18. ILLUSTRATION ON HOW TO INTERFACE CHANNEL 1 (OF THE XRT59L921) TO THE LINE (RECEIVER IS
TRANSFORMER-COUPLED TO A 120Ω BALANCED LINE)
TxPOS_x
TxNEG_x
TxLineClk_x
XRT59L921
TTIP_x
TxPOS_x
TxNEG_x
TxLineClk_x
TRING_x
9.1 Ω
9.1 Ω
1:2
TTIP_x
TRING_x
RxPOS_x
RxNEG_x
Loss Of Signal_x
RxPOS_x
RTIP_x
RxNEG_x
RxLOS_x
RRING_x
1:1
120 Ω
RTIP_x
RRing_x
28