EELXT332PE.G2-871662 Cortina Systems Inc, EELXT332PE.G2-871662 Datasheet - Page 26

• Manufacturer Part Number: EELXT332PE.G2-871662
• Manufacturer: Cortina Systems Inc

Specifications of EELXT332PE.G2-871662

• 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

LXT332
Datasheet
249075, Revision 2.0
26 June 2007
Figure 8
4.9.2
Figure 9
Cortina Systems
TAOS Data Path
Local Loopback
Local Loopback (LLOOP) is selected when LLOOP = 1 and RLOOP = 0. In LLOOP mode,
the receiver circuits are inhibited. The transmit clock and data inputs (TCLK and TPOS/
TNEG or TDATA) are looped back and output at RCLK and RPOS/RNEG or RDATA.
During Local Loopback, the JASEL input functions as follows: If JASEL = 0, JA is enabled
and active in both the Transmit path and the loopback circuit. If JASEL = 1, JA is enabled
in the Loopback circuit only. If JASEL = MCLK, JA is disabled.
The transmitter circuits are unaffected by LLOOP. The TPOS/TNEG or TDATA inputs (or a
stream of 1s if the TAOS command is active) will be transmitted normally. When used in
this mode, the transceiver can be used as a stand-alone jitter attenuator.
TAOS with LLOOP & Selectable JA
®
LXT332 Dual T1/E1 Line Interface Unit with Crystal-less Jitter Attenuation
TCLK
TPOS
TNEG
RCLK
RNEG
RPOS
TAOS
TPOS
TNEG
TCLK
RCLK
RNEG
RPOS
TAOS
Transmit All Ones = LLOOP
RCLK
RNEG
TAOS
TCLK
TPOS
TNEG
RPOS
(See
Transmit All Ones = LLOOP
+LLOOP & Tx JA
Transmit All Ones = LLOOP
+LLOOP & Rx JA
Figure 9
JA*
1
0
JA*
1
and
*If Enabled
Timing &
Control
Timing &
Control
Recovery
Recovery
Timing
Figure 10
RLOOP
Timing
Timing &
Recovery
Control
Timing
RLOOP
0
0
RLOOP
0
*If Enabled
*If Enabled
TAOS
1
1
TAOS
1
TAOS
)
4.9 Diagnostic Mode Operation
0
(All 1s)
RTIP
RRING
(All 1s)
RTIP
RRING
TTIP
TRING
TTIP
TRING
JASEL
RTIP
RRING
(All 1s)
TTIP
TRING
1
JASEL
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