XRT75R12IB-F Exar Corporation, XRT75R12IB-F Datasheet - Page 45

• Manufacturer Part Number: XRT75R12IB-F
• Description: Peripheral Drivers & Components (PCIs) 12 Channel 3.3V-5V temp -45 to 85C
• Manufacturer: Exar Corporation

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

REV. 1.0.4
The XRT75R12 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
6.2
6.2.1
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.
:
30. A
LOOPBACKS
TxPOS
TxNEG
RxPOS
RxNEG
RxClk
ANALOG LOOPBACK
TxClk
NALOG
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
L
OOPBACK
HDB3/B3ZS
HDB3/B3ZS
DECODER
ENCODER
Figure
30. Data and clock are output at RxClk_n, RxPOS_n and RxNEG_n
42
RECOVERY
CONTROL
DATA &
CLOCK
TIMING
Tx
Rx
XRT75R12
TTIP
RTIP
RRing
TRing