
Preliminary Data Sheet
September 2001
High-Voltage Ringing SLIC for VoIP Applications
L9500A
18
Agere Systems Inc.
Electrical Characteristics
(continued)
Table 17. Ringing Specifications
Table 18. Ring Trip
Ringing will not be tripped by the following loads:
I
10 k
resistor in parallel with a 6
μF capacitor applied across tip and ring. Ring frequency = 17 Hz to 23 Hz.
I
100
resistor in series with a 2 μF capacitor applied across tip and ring. Ring frequency = 17 Hz to 23 Hz.
Parameter
Min
Typ
Max
Unit
RING
INN/P
:
Input Voltage Swing
Input Impedance
Ring Signal Isolation:
PT/PR to VTX
Ring Mode
Ring Signal Isolation:
RING
IN
to PT/PR
Nonring Mode
Ring Signal Distortion:
5 REN 1380
, 40 μF Load, 100
Loop
Differential Gain:
RING
INN/P
to PT/PR—VRING
INN/P
=
0.7 Vp, V
BAT1
= –70 V, R
LOAD
= 1400
0
—
—
—
100
60
V
CC
—
—
V
k
dB
—
80
—
dB
—
3
—
%
115
128
140
—
Parameter
Min
Typ
Max
Unit
Ring Trip (NSTAT = 0):
Loop Resistance (total) V
BAT1
applied
Ring Trip (NSTAT = 1):
Loop Resistance (total) V
BAT1
applied
Trip Time (f = 20 Hz)
Hysteresis
100
—
600
—
—
—
—
—
7
10
100
—
k
ms
mA