LXT351 — T1/E1 Short Haul Transceiver with Crystal-less Jitter Attenuation
Table 16. Transmit Return Loss (2.048 Mbps)
Return Loss
EC3-1
Xfrmr/Rt
RL (Ω)
75
CL (pF)
(dB)
0
470
0
14
16
12
13
13
16
1:2/
9.1 Ω
000
120
470
0
1:2.3/9.1
120
Ω
470
Table 17. Transmit Return Loss (1.544 Mbps)
Return Loss
(dB)
EC3-1
Xfrmr/Rt
RL (Ω)
100
CL (pF)
0
16
17
2
1:2/
9.1 Ω
470
0
0112
1:1.151/
0.0 Ω
100
470
2
1. A 1:1.15 transmit transformer keeps the total transceiver
power dissipation at a low level, a 0.47 µF DC blocking
capacitor must be placed on TTIP or TRING.
2. Refer to Table 8.
Table 18. Transformer Specifications
Leakage
Inductance
µH
Interwinding
Capacitance
pF
Dielectric1
Breakdown
V
Primary
Inductance
µH (minimum)
DCR
Ω
(maximum)
Frequency
MHz
Turns
Ratio
Tx/Rx
(max)
(max)
(minimum)
0.90 pri
1.544
2.048
1:1.15
1:2.3
600
600
0.80
0.80
60
60
1500 VRMS
1.70 sec
2
0.70 pri
1500 VRMS
Tx
Rx
(3000 VRMS)
1.20 sec
2
1.0 pri
1.70 sec
1500 VRMS
1.544/2.048
1.544/2.048
1:2
1:1
600
600
0.80
1.10
60
60
(3000 VRMS)
2
1.10 pri
1.10 sec
1500 VRMS
(3000 VRMS)
1. Some ETSI applications may require a 2.3 kV dielectric breakdown voltage.
2. Some applications require transformers to guarantee performance in extended temperature range (-40° to +85° C) ETSI
applications require a dielectric breakdown voltage of 3000 VRMS.
30
Datasheet
INTEL [ INTEL ]
