XRT83L34_05 Datasheet, PDF (9/99 Pages) Exar Corporation – QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR

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XRT83L34
QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR REV. 1.0.1
SIGNAL NAME
RPOS_0/
RDATA_0
RPOS_1/
RDATA_1
RPOS_2/
RDATA_2
RPOS_3/
RDATA_3
PIN #
7
25
78
96
TYPE
O
DESCRIPTION
Receiver Positive-Polarity Data Output/Receive Data Output - Channel
n:
The exact function of this output pin depends upon whether the XRT83L34
device has been configured to operate in the Single-Rail or Dual-Rail Mode
as described below.
Dual-Rail Mode Operation - Receive Positive-Polarity Data Output Pin -
RPOS_n:
The Receive Section of Channel n will output the positive-polarity portion of
the Recovered incoming DS1/E1 data (from the remote terminal equipment)
via this output pin. Each Channel (within the XRT83L34 device) will update
the data (that is output via this output pin) upon the "user-selected" edge of
the RCLK_n output clock signal.
The "Negative-Portion" of this recovered incoming DS1/E1 data (from the
remote terminal equipment) will be output via the corresponding RNEG_n
output pin.
Single-Rail Mode Operation - Receive Data Output Pin - RDATA_n
If Channel n has been configured to operate in the Single-Rail Mode, then
the entire incoming DS1/E1 data (that has been recovered by the Receive
Section of Channel n) will be output via this output pin upon the "user-
selected" edge of the RCLK_n output clock signal.
RTIP_0
RTIP_1
RTIP_2
RTIP_3
9
I
Receiver Differential Tip Positive Input for Channel _n:
23
This input pin, along with the corresponding RRING_n input pin functions as
80
the "Receive DS1/E1 Line Signal" for Channel n, within the XRT83L34
94
device.
The user is expected to connect this signal and the corresponding RRING_n
input signal to a 1:1 transformer.
Whenever the RTIP_n/RRING_n input pins are receiving a positive-polarity
pulse within the incoming DS1 or E1 line signal, then this input pin will be
pulsed to a "higher-voltage" than that of the corresponding RRING_n input
pin.
Conversely, whenever the RTIP_n/RRING_n input pins are receiving a nega-
tive-polarity pulse within the incoming DS1 or E1 line signal, then this input
pin will be pulsed to a "lower-voltage" than that of the corresponding
RRING_n input pin.
RRING_0
10
I
Receiver Differential Ring Negative Input for Channel _n:
RRING_1
22
RRING_2
81
RRING_3
93
This input pin, along with the corresponding RTIP_n input pin functions as
the "Receive DS1/E1 Line Signal" for Channel n, within the XRT83L34
device.
The user is expected to connect this signal and the corresponding RTIP_n
input signal to a 1:1 transformer.
Whenever the RTIP_n/RRING_n input pins are receiving a positive-polarity
pulse within the incoming DS1 or E1 line signal, then this input pin will be
pulsed to a "lower-voltage" than that of the corresponding RTIP_n input pin.
Conversely, whenever the RTIP_n/RRING_n input pins are receiving a nega-
tive-polarity pulse within the incoming DS1 or E1 line signal, then this input
pin will be pulsed to a "higher-voltage" than that of the corresponding RTIP_n
input pin.
6