Le79555
SPECIFICATIONS
Refer to
Figure 9, on page 16
for the Le79555 test circuit specifications.
Data Sheet
Transmission Performance
Description
Two-wire return loss
Analog output (VTX) impedance
Analog (VTX) output offset voltage
Overload level, 2-wire
Overload level
THD (Total Harmonic Distortion)
THD, On hook
Active state
On hook, R
LAC
= 600
Ω
0 dBm
+7 dBm
0dBm, R
LAC
= 600
Ω
–50
2.5
1.1
–64
–55
–50
–40
–36
dB
Test Conditions (See Note 1)
200 Hz to 3.4 kHz
Min
26
1
20
+50
Typ
Max
Unit
dB
Ω
mV
Vpk
2a
2b
5
5
Note
1, 4
4
Longitudinal Capability
(
See
Figure 6.
)
Description
Test Conditions
(See Note 1)
Normal Polarity:
0ºC to +70ºC
-40ºC to +85ºC
Longitudinal to metallic L-T, L-4
200 Hz to 1 kHz
0ºC to +70ºC
-40ºC to +85ºC
Reverse Polarity:
-40ºC to +85ºC
0ºC to +70ºC
-40ºC to +85ºC
Normal Polarity:
0ºC to +70ºC
-40ºC to +85ºC
Longitudinal to metallic L-T, L-4
1 kHz to 3.4 kHz
0ºC to +70ºC
-40ºC to +85ºC
Reverse Polarity:
-40ºC to +85ºC
0ºC to +70ºC
-40ºC to +85ºC
Longitudinal signal generation 4-L
Longitudinal current per pin (A or B)
Longitudinal impedance at A or B
200 Hz to 3.4 kHz
Active state
0 to 100 Hz
-2
-1
-1
53
52
50
40
17
27
25
mArms
Ω/pin
4, 8
4
4
4
-2,-4
-2,-4
-1,-3
-1,-3
58
53
52
50
4
4
-2
-1
-1
54
52
50
dB
4
4
-2,-4
-2,-4
-1,-3
-1,-3
63
58
52
50
4
4
Perf.
Grade
Min
Typ
Max
Unit
Note
Idle Channel Noise
Description
C-message weighted noise
Test Conditions (See Note 1)
R
L
= 600Ω, 0º to +70ºC
R
L
= 600Ω, –40º to +85ºC
R
L
= 600Ω, 0º to +70ºC
R
L
= 600Ω, –40º to +85ºC
–83
Min
Typ
7
Max
+10
+12
–80
–78
Unit
dBrnC
4
dBmp
Note
Psophometric weighted noise
8
Zarlink Semiconductor Inc.
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