EELXT360PE.A2SE001 Intel, EELXT360PE.A2SE001 Datasheet - Page 24

• Manufacturer Part Number: EELXT360PE.A2SE001
• Manufacturer: Intel

Specifications of EELXT360PE.A2SE001

• Number Of Transceivers: 1
• Operating Supply Voltage (typ): 5V
• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (max): 5.25V
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Compliant

LXT360 — Integrated T1/E1 LH/SH Transceiver for DS1/DSX-1 or PRI Applications
2.7.2
2.7.2.1
2.7.2.2
24
Figure 9. Dual Loopback
Figure 10. TAOS Data Path
Internal Pattern Generation and Detection
Transmit All Ones (TAOS)
See
transmits a continuous stream of 1’s at the TCLK frequency. When TCLK is not supplied, TAOS
timing is derived from MCLK. This can be used as the Alarm Indication Signal (AIS–also called
the Blue Alarm).
Both TAOS and LLOOP can operate simultaneously as shown in
inhibits TAOS. When both TAOS and LLOOP are active, TCLK and TPOS/TNEG loop back to
RCLK and RPOS/RNEG (through the jitter attenuator if enabled), and the all ones pattern is also
routed to TTIP/TRING.
In Host mode, TAOS is activated when bit CR2.ETAOS = 1. In Hardware mode, setting the TAOS
pin High activates TAOS.
Quasi-Random Signal Source (QRSS)
See
random bit sequence (PRBS) with no more than 14 consecutive zeros. For E1 operation, QRSS is
2
Both Hardware and Host Modes allow QRSS mode. The QRSS pattern is normally locked to
TCLK, however, if there is no TCLK, MCLK is the clock source. Bellcore Pub 62411 defines the
T1 QRSS transmit format and ITU G.703 defines the E1 format.
With QRSS transmission enabled, it is possible to insert a logic error into the transmit data stream
by causing a Low-to-High transition on the INSLER pin. However, if no logic or bit errors are to be
inserted into the QRSS pattern, INSLER must remain Low. Logic Error insertion waits until the
next bit if the current bit is “jammed”. When there are more than 14 consecutive 0s, the output is
jammed to a 1.
15
-1 PRBS with inverted output.
Figure
Figure
10. When TAOS is active, the transceiver ignores the TPOS and TNEG inputs and
11. For T1 operation, the Quasi-Random Signal Source (QRSS) is a 2
Figure
5, however, RLOOP
20
-1 pseudo-
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