XRT75R12IB-F Exar Corporation, XRT75R12IB-F Datasheet - Page 44
XRT75R12IB-F
Manufacturer Part Number
XRT75R12IB-F
Description
Peripheral Drivers & Components (PCIs) 12 Channel 3.3V-5V temp -45 to 85C
Manufacturer
Exar Corporation
Datasheet
1.XRT75R12IB-F.pdf
(90 pages)
Specifications of XRT75R12IB-F
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Operating Supply Voltage
3.3 V
Package / Case
TBGA-420
Ic Interface Type
Parallel, Serial
Supply Voltage Range
3.135V To 3.465V
Operating Temperature Range
-40°C To +85°C
Digital Ic Case Style
BGA
No. Of Pins
420
Filter Terminals
SMD
Rohs Compliant
Yes
Data Rate Max
51.84Mbps
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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XRT75R12
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
The XRT75R12 contains an on-chip Pseudo Random Binary Sequence (PRBS) generator and detector for
diagnostic purpose. With the PRBSEN_n bit = “1”, the transmitter will send out PRBS of 2
2
PRBS pattern is detected by the receiver, the RNEG/LCV pin will go “Low” to indicate PRBS synchronization
has been achieved. When the PRBS detector is not in sync the PRBSLS bit will be set to “1” and RNEG/LCV
pin will go “High”.
With the PRBS mode enabled, the user can also insert a single bit error by toggling “INSPRBS” bit. This is
done by writing a “1” to INSPRBS bit. The receiver at RNEG/LCV pin will pulse “High” for one RxClk cycle for
every bit error detected. Any subsequent single bit error insertion must be done by first writing a “0” to
INSPRBS bit and followed by a “1”.
Figure 29
N
F
6.0 DIAGNOSTIC FEATURES
6.1
15
OTE
IGURE
-1 in STS-1/DS3 rate. At the same time, the receiver PRBS detector is also enabled. When the correct
: In PRBS mode, the device is forced to operate in Single-Rail Mode.
29. PRBS MODE
PRBS Generator and Detector
shows the status of RNEG/LCV pin when the XRT75R12 is configured in PRBS mode.
RxNEG/LCV
RxClk
SYNC LOSS
PRBS SYNC
Single Bit Error
41
23
-1 in E3 rate or
REV. 1.0.4
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