XRT75R12DIB-F Exar Corporation, XRT75R12DIB-F Datasheet - Page 37

• Manufacturer Part Number: XRT75R12DIB-F
• Description: Peripheral Drivers & Components (PCIs) 12 Channel 3.3V-5V temp -45 to 85C
• Manufacturer: Exar Corporation

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

REV. 1.0.3
When the Digital Loopback is selected, the transmit clock TxClk_n and transmit data inputs (TxPOS_n &
TxNEG_n are looped back and output onto the RxClk_n, RxPOS_n and RxNEG_n pins as shown in
Figure
With Remote loopback activated as shown in
after the jitter attenuator (if selected in receive or transmit path) to the transmit path using RxClk as transmit
timing. The receive data is also output via the RxPOS and RxNEG pins.
N
F
F
5.2.2
5.2.3
OTE
IGURE
IGURE
: Input signals on TxClk, TxPOS and TxNEG are ignored during Remote loopback.
TxPOS
TxNEG
TxPOS
TxNEG
RxCLK
RxCLK
RxNEG
RxPOS
TxCLK
TxCLK
RxNEG
RxPOS
19.
19. D
20. R
DIGITAL LOOPBACK
REMOTE LOOPBACK
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
IGITAL
EMOTE
L
L
OOPBACK
OOPBACK
HDB3/B3ZS
HDB3/B3ZS
HDB3/B3ZS
DECODER
HDB3/B3ZS
DECODER
ENCODER
ENCODER
Figure
33
20, the receive data on RTIP and RRing is looped back
RECOVERY
RECOVERY
CONTROL
CONTROL
DATA &
DATA &
CLOCK
CLOCK
TIMING
TIMING
Tx
Rx
Tx
Rx
XRT75R12D
RTIP
TTIP
RTIP
RRing
TTIP
TRing
TRing
RRing