XRT81L27 Datasheet, PDF (9/30 Pages) Exar Corporation – SEVEN CHANNEL E1 LINE INTERFACE UNIT WITH CLOCK RECOVERY

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XRT81L27
SEVEN CHANNEL E1 LINE INTERFACE UNIT WITH CLOCK RECOVERY
REV. 1.1.0
PIN DESCRIPTIONS
NOTE: I -H indicates an input pin with a 50kΩ pull-up Resistor, I-L indicates an input pin with a 50kΩ pull-down resistor.
PIN #
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
NAME
TVDD_5
TTIP_5
PDTx_5
RRING_5
RTIP_5
AGND
RRING_3
RTIP_3
AVDD
TGND_3
TRING_3
TVDD_3
TTIP_3
PDTx_3
TGND_1
TRING_1
TVDD_1
TTIP_1
PDTx_1
RRING_1
RTIP_1
ICT
95
LOS_1
96
RClk_1
97
RNEG_1/
LCV_1
98
RPO_1S/
RDATA_1
99
LOS_3
100
RClk_3
101
RNEG_3/
LCV_3
TYPE
Vdd
O
I-H
I
I
Gnd
I
I
AVdd
Gnd
O
Vdd
O
I-H
Gnd
O
Vdd
O
I-H
I
I
I-H
O
O
O
O
O
O
O
DESCRIPTION
Transmitter 5 Positive Supply (3.3V± 5%)
Transmitter 5 Tip Output: Positive bipolar data output to the line.
Power-down Transmitter 5: (see pin 6)
Receiver 5 Bipolar Negative Input:
Receiver 5 Bipolar Positive Input:
Analog Supply Ground
Receiver 3 Bipolar Negative Input:
Receiver 3 Bipolar Positive Input:
Analog Positive Supply(3.3V± 5%)
Transmitter 3 Supply Ground
Transmitter 3 Ring Output: Negative bipolar data output to the line.
Transmitter 3 Positive Supply(3.3V± 5%)
Transmitter 3 Tip Output: Positive bipolar data output to the line.
Power-down Transmitter 3: (see pin 6)
Transmitter 1 Supply Ground.
Transmitter 1 Ring Output: Negative bipolar data output to the line.
Transmitter 1 Positive Supply(3.3V± 5%)
Transmitter 1 Tip Output: Positive bipolar data output to the line.
Power-down Transmitter 1: (see pin 6)
Receiver 1 Bipolar Negative Input:
Receiver 1 Bipolar Positive Input:
In-Circuit Testing (Active Low):
When this pin is tied to "Low", all output pins are forced to high imped-
ance state for in-circuit testing.
Receiver 1 Loss of Signal: (see pin 2)
Receiver 1 Clock Output:
Receiver 1 Negative Data Output: (see pin 34)
Receiver 1 Positive/NRZ Data Output: (see pin 35)
Receiver 3 Loss of Signal: (see pin 2)
Receiver 3 Clock Output:
Receiver 3 Negative Data Output: (see pin 34)
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