xrt75r03 Exar Corporation, xrt75r03 Datasheet - Page 88

• Manufacturer Part Number: xrt75r03
• Description: Xrt75r03 -multi-channel Line Interface Unit Liu Family Desynchronizer And Jitter Attenuator With R3 Technologytm
• Manufacturer: Exar Corporation

XRT75R03
REV. 1.0.8
In this mode, the transmitter outputs (TTIP_n and TRING_n) are connected internally to the receiver inputs
(RTIP_n and RRING_n) as shown in Figure 26. Data and clock are output at RCLK_n, RPOS_n and RNEG_n
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.
XRT75R03 can be configured in Analog Loopback either in Hardware mode via the LLB_n and RLB_n pins or
in Host mode via LLB_n and RLB_n bits in the channel control registers.
N
F
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.
:
27. A
TPDATA
TNDATA
RPOS
RNEG
RCLK
TCLK
NALOG
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
L
OOPBACK
1
2
Transmit path
if enabled
if enabled and selected in either Receive or
HDB3/B3ZS
HDB3/B3ZS
DECODER
ENCODER
1
1
85
RECOVERY
CONTROL
DATA &
CLOCK
TIMING
Tx
Rx
xr
xr
xr
xr
TTIP
RTIP
RRING
TRING