XRT75R12DIB-F Exar Corporation, XRT75R12DIB-F Datasheet - Page 36
![Peripheral Drivers & Components (PCIs) 12 Channel 3.3V-5V temp -45 to 85C](/photos/16/9/160975/xrt75r12_sml.jpg)
XRT75R12DIB-F
Manufacturer Part Number
XRT75R12DIB-F
Description
Peripheral Drivers & Components (PCIs) 12 Channel 3.3V-5V temp -45 to 85C
Manufacturer
Exar Corporation
Datasheet
1.XRT75R12DIB-F.pdf
(133 pages)
Specifications of XRT75R12DIB-F
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Operating Supply Voltage
3.3 V to 5 V
Package / Case
TBGA-420
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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XRT75R12D
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
The XRT75R12D offers three loopback modes for diagnostic purposes. The loopback modes are selected via
the RLB_n and LLB_n bits n the Channel control registers select the loopback modes.
In this mode, the transmitter outputs TTIP_n and TRing_n are internally connected to the receiver inputs
RTIP_n and RRing_n as shown in
pins for the corresponding transceiver. Analog loopback exercises most of the functional blocks of the device
including the jitter attenuator which can be selected in either the transmit or receive path.
N
F
5.2
5.2.1
OTES
IGURE
1. In the Analog loopback mode, data is also output via TTIP_n and TRing_n pins.
2. Signals on the RTIP_n and RRing_n pins are ignored during analog loopback.
:
18. A
LOOPBACKS
TxPOS
TxNEG
RxPOS
RxNEG
RxClk
ANALOG LOOPBACK
TxClk
NALOG
L
OOPBACK
HDB3/B3ZS
HDB3/B3ZS
DECODER
ENCODER
Figure
18. Data and clock are output at RxClk_n, RxPOS_n and RxNEG_n
32
RECOVERY
CONTROL
DATA &
CLOCK
TIMING
Tx
Rx
TTIP
RTIP
RRing
TRing
REV. 1.0.3
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