DJLXT380LE.B4 Cortina Systems Inc, DJLXT380LE.B4 Datasheet - Page 26

• Manufacturer Part Number: DJLXT380LE.B4
• Manufacturer: Cortina Systems Inc

Specifications of DJLXT380LE.B4

• Lead Free Status / RoHS Status: Not Compliant

LXT380 — Octal E1 G.703 Transceiver
2.7.2
2.7.3
26
Figure 8. Digital Loopback
Figure 9. Remote Loopback
Note: Signals on the RTIP & RRING pins are ignored during digital loopback. See
Note: Input signals on the TPOS & TNEG pins are ignored during remote loopback.
Digital Loopback
The digital loopback function is available in host mode only. When selected, the transmit clock and
data inputs (TCLK, TPOS & TNEG) are looped back and output on the RCLK, RPOS & RNEG
pins. The data presented on TCLK, TPOS & TNEG is also output on the TTIP & TRING pins.
Remote Loopback
During remote loopback, the RCLK, RPOS & RNEG outputs routed to the transmit circuits and
output on the TTIP & TRING pins.
In clock recovery mode, TCLK will tristate the output driver if held Low. See
* If Enabled
RNEG
TNEG
RPOS
RNEG
TPOS
RPOS
RCLK
* If Enabled
TPOS
TNEG
TCLK
RCLK
TCLK
Recovery
Timing &
Control
Timing
Recovery
Timing &
Control
Timing
TTIP
TRING
RTIP
RRING
TTIP
TRING
RTIP
RRING
Figure
Figure
8.
9.
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