XRT75R03IVTR Exar Corporation, XRT75R03IVTR Datasheet - Page 85

• Manufacturer Part Number: XRT75R03IVTR
• Description: IC LIU E3/DS3/STS-1 3CH 128LQFP
• Manufacturer: Exar Corporation

Specifications of XRT75R03IVTR

• Lead Free Status / RoHS Status: Contains lead / RoHS Compliant

xr
xr
xr
xr
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
B
IT
N
UMBER
1
0
STS-1/
SR/DR_n
N
AME
DS3
_n
T
R/W
R/W
YPE
D
V
EFAULT
ALUE
0
0
82
STS-1/DS3 Mode Select - Channel_n:
This READ/WRITE bit-field, along with Bit 2 (E3_n) is used
to configure a given channel (within the XRT75R03) into
either the DS3, E3 or STS-1 Modes.
0 - Configures Channel_n to operate in the DS3 Mode
(provided by Bit 2 [E3_n], within this same register) has
been set to "0").
1 - Configures Channel_n to operate in the STS-1 Mode
(provided that Bit 2 [E3_n], within the same register) has
been set to "0".
N
Single-Rail/Dual-Rail Select - Channel_n:
This READ/WRITE bit-field is used to configure Channel_n
to operate in either the Single-Rail or Dual-Rail Mode.
If the user configures the Channel to operate in the Single-
Rail Mode, then all of the following will happen.
•
•
•
•
If the user configures Channel_n to operate in the Dual-
Rail Mode, then all of the following will happen.
•
•
•
0 - Configures Channel_n to operate in the Dual-Rail
Mode.
1 - Configures Channel_n to operate in the Single-Rail
Mode.
OTE
The B3ZS/HDB3 Encoder and Decoder blocks (within
Channel_n) will be enabled.
The Transmit Section of Channel_n will accept all of the
outbound data (from the System-side Equipment) via the
TPDATA_n (or TxDATA_n) input pin.
The Receive Section of each channel will output all of
the recovered data (to the System-side Equipment) via
the RPOS_n output pin.
The corresponding RNEG_n/LCV_n output pin will now
function as the LCV (Line Code Violation or Excessive
Zero Event) indicator output pin for Channel_n.
The B3ZS/HDB3 Encoder and Decoder blocks of
Channel_n will be disabled.
The Transmit Section of Channel_n will be configured to
accept positive-polarity data via the TPDATA_n input pin
and negative-polarity data via the TNDATA_n input pin.
The Receive Section of Channel_n will pulse the
RPOS_n output pin "High" (for one period of RCLK_n)
for each time a positive-polarity pulse is received via the
RTIP_n/RRING_n input pins.
Section of each channel will also pulse the RNEG_n
output pin "High" (for one period of RCLK_n) for each
time a negative-polarity pulse is received via the
RTIP_n/RRING_n input pins.
: This bit-field is ignored if Bit 2 (E3_n) has been set
to "1". In this case, Channel_n will be configured
to operate in the E3 Mode.
D
ESCRIPTION
Likewise, the Receive
XRT75R03
REV. 1.0.8