SLXT332QE.G2 S E001 Intel, SLXT332QE.G2 S E001 Datasheet - Page 32

• Manufacturer Part Number: SLXT332QE.G2 S E001
• Manufacturer: Intel

Specifications of SLXT332QE.G2 S E001

• 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: Not Compliant

LXT332 — Dual T1/E1 Line Interface Unit with Crystal-less Jitter Attenuation
4.5
4.5.1
4.5.2
32
Figure 15. Line Interface for E1 Coax Applications
2.048 Mbps E1/CEPT Interface Applications
E1 Coaxial Applications
Figure 15
LEN code should be set to 000 for coax. With 9.1 Rt resistors in line with the 1:2 output
transformers, the LXT332 produces 2.37 V peak pulses as required for coax applications. As in the
T1 application shown in
E1 Twisted-Pair Applications
Figure 16
tied to ground, the LXT332 operates in the bipolar data I/O mode. The JA circuit is placed in the
transmit path by the Low on JASEL. The line length equalizers are controlled by the hardwired
LEN inputs. With the LEN code set to 001 and 15 Rt resistors in line with the 1:2 output
transformers, the LXT332 produces the 3.0 V peak pulses required for this application. Center
tapped 1:2 transformers are used on the receive side.
A single clock source provides the 2.048 MHz input to MCLK and TCLK. The DFM pin may
routed to an LED driver or other indicator, or it may be left unconnected. Switches on the TAOS,
LLOOP and RLOOP inputs provide mode control and hardware reset capability.
The transmit driver power supply pins (TVCC0 and TVCC1) are tied to a common bus with 68 µF
decoupling capacitors. The power supply for the remaining (non-driver) circuitry (VCC) uses 1.0
µF and 0.1 µF decoupling capacitors.
shows the line interface for a typical 2.048 Mbps E1 coaxial (75 ) application. The
shows a typical 2.048 Mbps E1 twisted-pair (120 ) application. With the TRSTE pin
Figure
LXT332
2
1 Typical value. Adjust for actual board
parasitics to obtain optimum return loss.
Protection diodes (Schottky):
International Rectifier: 11DQ04 or 10BQ060;
Motorola: MBR0540T1.
14, center tapped 1:2 transformers are used on the receive side.
RRINGn
TRINGn
RTIPn
TTIPn
2
+5V
1k
1k
+5V
Rr=150
Rr=150
Rt
Rt
=9.1
=9.1
470
pF
1
2CT:1
1:2
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