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Advance Data Sheet
March 1997
L8575
Dual-Resistive, Low-Cost SLIC
Lucent Technologies Inc.
13
Electrical Characteristics
(continued)
Transmission
Transmit direction is Tip/Ring to XMT. Receive direction is IRP/VRN to Tip/Ring.
Table 7. Transmission Characteristics
1. IEEEis a registered trademark of The Institute of Electrical and Electronics Engineers, Inc.
2. Assumes ideal external components.
3. This parameter is not tested in production. It is guaranteed by design and device characterization.
4. Transmission characteristics are specified assuming a 600
resistive termination; however, feedback using external components allows the
user to adjust the termination impedance from the intrinsic 600
of the feed resistors to most ITU-T recommended complex termination
impedances.
5. Measured with the L8575 SLIC connected per application diagram with ideal external components.
Parameter
Min
Typ
Max
Unit
Longitudinal Balance (IEEE
1
Std. 455—1976)
2
:
50 Hz—1 kHz
1 kHz—3 kHz
Metallic to Longitudinal Balance
2
:
200 Hz—4 kHz
RFI Rejection
3
:
(0.5 Vrms, 50
source, 30% AM Mod. 1 kHz)
500 kHz—10 MHz
10 MHz—100 MHz
Tip/Ring Signal Level
ac Termination Impedance
4
Total Harmonic Distortion (200 Hz—4 kHz)
3
Transmit Gain (
= 1 kHz)
5
:
Tip/Ring to XMT
Receive Gain (
= 1 kHz):
IRP Current to Differential Current Flowing from PT to PR
VRV to IRP
CBN Gain (
= 1 kHz):
1 RGBN Current to Current Flowing
CBN to RGBN
Gain vs. Frequency (transmit & receive; 1 kHz reference)
3
:
200 Hz—3.4 kHz
Gain vs. Level (transmit & receive; 0 dBV reference)
3
:
–50 dB to +3 dB
Interchannel Crosstalk
3
:
200 Hz—3.4 kHz
Idle-channel Noise (Tip/Ring; 600
termination):
Psophometric
3
C-message
3 kHz flat
3
Idle-channel Noise (XMT; 600
termination):
Psophometric
3
C-message
3 kHz flat
3
54
50
70
66
—
—
dB
dB
30
—
—
dB
—
—
—
—
—
—
—
—
600
—
–65
–45
3.17
—
0.3
dBV
dBV
dBm
%
–0.486
–0.500
–0.514
—
195
0.995
200
1
205
1.005
—
—
–49.5
0.995
–50
1
–50.5
1.005
—
—
–0.1
0
0.1
dB
–0.05
0
0.05
dB
—
—
77
dB
—
—
—
—
—
—
–77
12
20
dBmp
dBrnC
dBrn
—
—
—
—
—
—
–77
12
20
dBmp0
dBrnC0
dBrn0