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XRT82D20 Datasheet(PDF) 6 Page - Exar Corporation

Part # XRT82D20
Description  SINGLE CHANNEL E1 LINE INTERFACE UNIT
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT82D20 Datasheet(HTML) 6 Page - Exar Corporation

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XRT82D20
5
SINGLE CHANNEL E1 LINE INTERFACE UNIT
REV. 1.0.8
22
TTIP
O
Transmitter TIP Output:
Positive bipolar data output to the line.
23
TxLEV
I
Transmit Level:
Tie this pin high for 120
Ω twisted pair cable operation and tie it low for 75 Ω coaxial
cable operation (internal pull-down). This pin is only active for 5.0V operation.
24
AVDD
-
Analog Positive Supply
5.0 V + 5% or 3.3 V+ 5%
25
AGND
-
Analog Supply Ground
26
MuteRx
I
Mute Receive Output:
With this pin tied high, a loss of receive input signal (RLOS=0) will cause ClkLOS to
go low and generate the following.
Dual-rail mode operation:
With DIGI = 0, RClk = 1, RPOS and RNEG/RData = 0
fWith DIGI = 1, RClk =0, RPOS and RNEG/RData = 1
Single-rail mode:
RClk = 1 and RData=0
(internal pull-down)
27
RRing
I
Receive Bipolar Negative Input:
Bipolar line signal input to the receiver.
28
RTIP
I
Receiver Bipolar Positive Input:
Bipolar line signal input to the receiver.
PIN #SYMBOL
TYPE
DESCRIPTION


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