WJLXT384LE.B1-868635 Cortina Systems Inc, WJLXT384LE.B1-868635 Datasheet - Page 56

• Manufacturer Part Number: WJLXT384LE.B1-868635
• Manufacturer: Cortina Systems Inc

Specifications of WJLXT384LE.B1-868635

• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Compliant

LXT384 Transceiver
Datasheet
248994, Revision 6.0
30 January 2008
Table 20
Table 21
6.6
Cortina Systems
Table 20
of power used and the type of cable with which the component is used.
Component Values to Use with Transformer Circuit
Table 21
Transmitter Transformer Turns Ratio Selection
Jitter Attenuation
Figure 7
neither an external crystal nor a reference clock that has a frequency higher than the line
frequency.
Data signals are clocked into the FIFO with the associated clock signal (TCLKi or RCLKi)
and are clocked out of the FIFO with the JA clock after removing jitter (TCLKo when TCLKi
is used, or RCLKo when RCLKi is used). When the FIFO is within two bits of overflowing or
underflowing, the FIFO adjusts the output clock by 1/8 of a bit period. For the associated
path, the JA produces a constant throughput delay of either 16 bits (when a 32 x 2-bit
register is used) or 32 bits (when a 64 x 2-bit register is used).
®
R
characteristic impedance
characteristic impedance
LXT384 Octal T1/E1/J1 Short-Haul PCM Transceiver with Jitter Attenuation (JA)
T
R
Low-power 75/120 Ω
R
Standard-Power Value
R
Standard 75/12 Ω
T
Characteristic
(Receive Resistor)
Low-Power Value
Component
Impedance
shows the internal LXT384 Transceiver jitter attenuation (JA) unit, which requires
lists the component values to use with the
lists the transmitter transformer turns ratios that can selected.
Component Value to Use with
Transmitter Transformer
75 Ω Coaxial Cable
Turns Ratio
9.31 Ω ± 1%
10 Ω ± 1%
11 Ω ± 1%
1:1.7
1:2
Figure 6
Component Value to Use with
Component Value to Use with
TM
TM
120 Ω Twisted-Pair Cable
120 Twisted-Pair Cable
Rt = 10 Ω ± 1%
circuit, depending on the type
Rt = 11 Ω ± 1%
10 Ω ± 1%
11 Ω ± 1%
15 Ω ± 1%
6.6 Jitter Attenuation
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