DJLXT386LE.B2 S E001 Intel, DJLXT386LE.B2 S E001 Datasheet - Page 28

• Manufacturer Part Number: DJLXT386LE.B2 S E001
• Manufacturer: Intel

Specifications of DJLXT386LE.B2 S E001

• Lead Free Status / RoHS Status: Not Compliant

LXT386 — QUAD T1/E1/J1 Transceiver
3.3.1
3.3.1.1
3.3.1.2
.
28
1. Line length from LXT386 to DSX-1 cross-connect point.
2. Maximum cable loss at 772KHz.
LEN2
Table 2.
0
1
1
1
1
0
LEN1
Transmit Pulse Shaping
The transmitted pulse shape is internally generated using a high speed D/A converter. Shaped
pulses are further applied to the line driver for transmission onto the line at TTIP and TRING. The
line driver provides a constant low output impedance regardless of whether it is driving marks,
spaces or if it is in transition. This well controlled dynamic impedance provides excellent return
loss when used with external precision resistors (± 1% accuracy) in series with the transformer.
Hardware Mode
In hardware mode, pins LEN0-2 determine the pulse shaping as described in
settings also determine whether the operating mode is T1 or E1. Note that in T1 operation mode, all
four ports will share the same pulse shaping setting. Independent pulse shaping for each channel is
available in host mode
Host Mode
In Host Mode, the contents of the Pulse Shaping Data Register (PSDAT) determines the shape of
pulse output at TTIP/TRING. Refer to
Line Length Equalizer Inputs
1
0
0
1
1
0
LEN0
1
0
1
0
1
0
0 - 133 ft. ABAM
133 - 266 ft. ABAM
266 - 399 ft. ABAM
399 - 533 ft. ABAM
533 - 655 ft. ABAM
E1 G.703, 75Ω coaxial cable and 120 Ω twisted pair cable.
Line Length
Table 24
1
and
Table
Cable Loss
25.
0.6 dB
1.2 dB
1.8 dB
2.4 dB
3.0 dB
2
Table
Operation Mode
2. The LEN
T1
E1
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