XRT82D20_06 Datasheet, PDF (22/27 Pages) Exar Corporation – SINGLE CHANNEL E1 LINE INTERFACE UNIT

XRT82D20
SINGLE CHANNEL E1 LINE INTERFACE UNIT
REV. 1.0.8
FIGURE 16. CAPACITIVELY-COUPLING THE RECEIVE SECTION FOR 75 OHM APPLICATION AND 5V SUPPLY
75 Ω Coax
75 Ω
Signal
Source
75 Ω Coax
R Load
75 Ω
0.1 µF
37.4 Ω
RTIP
Rx Input
0.1 µF
RRING
1.36:1
15.4 Ω
TTIP
Tx Output
15.4 Ω
TRING
RPOS/RData
RNEG/LCV
RClk
TVDD
AVDD
10 µF
TxLEV
TGND
AGND
+5 V
0.1 µF
TNEG/CODE
TPOS/TData
TClk
NOTE: Resistive divider attenuates the input signal by one-half for both 75 Ω and 120 Ω applications.
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