XRT83L314ES Exar, XRT83L314ES Datasheet - Page 38

• Manufacturer Part Number: XRT83L314ES
• Description: LIN Transceivers
• Manufacturer: Exar

Specifications of XRT83L314ES

• Product Category: LIN Transceivers
• Rohs: yes

XRT83L314
14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.0
This applications section describes common T1/E1 system considerations along with references to application
notes available for reference where applicable.
The XRT83L314 supports several loopback modes for diagnostic testing. The following section describes the
local analog loopback, remote loopback, digital loopback, and dual loopback modes.
With local analog loopback activated, the transmit output data at TTIP/TRING is internally looped back to the
analog inputs at RTIP/RRING. External inputs at RTIP/RRING are ignored while valid transmit output data
continues to be sent to the line. A simplified block diagram of local analog loopback is shown in Figure 31.
F
N
With remote loopback activated, the receive input data at RTIP/RRING is internally looped back to the transmit
output data at TTIP/TRING. The remote loopback includes the Receive JA (if enabled). The transmit input
data at TCLK/TPOS/TNEG are ignored while valid receive output data continues to be sent to the system. A
simplified block diagram of remote loopback is shown in Figure 32.
F
4.0 T1/E1 APPLICATIONS
4.1
4.1.1
4.1.2
IGURE
OTE
IGURE
: The transmit diagnostic features such as TAOS, NLC generation, and QRSS take priority over the transmit input
data at TCLK/TPOS/TNEG.
31. S
32. S
Loopback Diagnostics
Local Analog Loopback
Remote Loopback
IMPLIFIED
IMPLIFIED
TNEG
RPOS
RNEG
TPOS
RCLK
TCLK
B
B
LOCK
LOCK
RPOS
RNEG
TPOS
TNEG
RCLK
TCLK
D
D
NLC/PRBS/QRSS
IAGRAM OF
IAGRAM OF
Encoder
Decoder
NLC/PRBS/QRSS
Encoder
Decoder
L
R
OCAL
EMOTE
JA
JA
A
JA
JA
NALOG
L
OOPBACK
34
Data and
Recovery
Control
Timing
Clock
Data and
Recovery
L
Control
Timing
Clock
OOPBACK
TAOS
TAOS
Tx
Rx
Tx
Rx
TRING
TTIP
RRING
RTIP
TRING
RRING
TTIP
RTIP