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参数资料
型号： WJLXT384LEB1
厂商： CORTINA SYSTEMS INC
元件分类： 数字传输电路
英文描述： DATACOM, PCM TRANSCEIVER, PQFP144
封装： 20 X 20MM, ROHS COMPLIANT, LQFP-144
文件页数： 4/140页
文件大小： 1514K
代理商： WJLXT384LEB1
101
Document Number: 248994
Revision Number: 005
Revision Date: November 28, 2005
Intel LXT384 Octal T1/E1/J1 S/H PCM Transceiver with JA
Table 61 (E1) and Table 62 (T1) list the AC characteristics for the LXT384 Transceiver transmitter.
Table 61. Intel
LXT384 Transceiver E1 Transmit Transmission Characteristics
Parameter
Sym
Min.
Typ
Max
Unit
Test Condition
Output pulse
amplitude
75
Ω
120
Ω
–
2.14
2.7
2.37
3.0
2.60
3.3
V
Tested at the line side
Peak voltage of a
space
75
Ω
120
Ω
–
-0.237
-0.3
0.237
0.3
V
Transmit amplitude variation with supply
–
-1
+1
%
Difference between pulse sequences
–
200
mV
For 17 consecutive
pulses
Pulse width ratio of the positive and negative
pulses
–
0.95
1.05
At the nominal half
amplitude
Transmit transformer turns ratio for
75/120
Ω characteristic impedance
–1:2
Rt = 11
Ω ± 1%
Transmit return
loss 75
Ω coaxial
cable1
51kHz to 102 kHz
102 kHz to 2.048 MHz
2.048 MHz to 3.072 MHz
–
15
17
–
dB
Using components in
the LXD384
evaluation board.
Transmit return
loss 120
Ω twisted
pair cable
1
51kHz to 102 kHz
102 kHz to 2.048 MHz
2.048 MHz to 3.072 MHz
–
15
20
–
dB
Using components in
the LXD384
evaluation board
Transmit intrinsic jitter: 20Hz to 100kHz
–
0.030
0.050
U.I.
Tx path TCLK is jitter
free
Transmit path
delay
Bipolar mode
2
U.I.
JA Disabled
Unipolar mode
7
U.I.
1. Guaranteed by design and other correlation methods.
Table 62. Intel LXT384 Transceiver T1 Transmit Transmission Characteristics (Sheet 1 of 2)
Parameter
Sym
Min.
Typ
Max
Unit
Test Condition
Output pulse amplitude
–
2.4
3.0
3.6
V
Measured at the DSX
Peak voltage of a space
–
-0.15
–
+0.15
V
Driver output impedance1
––
1
–
Ω
@ 772 KHz
Transmit amplitude variation with power
supply
–-1
–
+1
%
Ratio of positive to negative pulse amplitude
–
0.95
–
1.05
–
T1.102, isolated pulse
Difference between pulse sequences
–
200
mV
For 17 consecutive
pulses, GR-499-CORE
Pulse width variation at half amplitude
–
20
ns
Jitter added by
Transmitter
1
10Hz - 8KHz
8KHz - 40KHz
10Hz - 40KHz
Wide Band
––
–
0.020
0.025
0.050
UIpk-pk
AT&T Pub 62411
TCLK is jitter free
1. Guaranteed by design and other correlation methods.
2. Power measured in a 3 KHz bandwidth at the point the signal arrives at the distribution frame for an all 1’s
pattern.
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