L8576B Dual Ringing SLIC
Data Sheet
May 2001
Electrical Characteristics
Generally, minimum and maximum values are testing requirements. However, some parameters may not be tested
in production because they are guaranteed by design and device characterization. Typical values reflect the design
center or nominal value of the parameter; they are for information only and are not a requirement. Minimum and
maximum values apply across the entire temperature range (0 °C to 70 °C) and entire battery range (to –72 V).
Unless otherwise specified, typical values are defined as 20 °C, V
CC
= 5.0 V, V
BAT
= –68.5 V. Positive currents flow
into the device.
Table 3. Operating Conditions and Powering
Parameter
Temperature Range
Humidity Range
Supply Voltages:
V
CC
V
BAT
Loop Closure Threshold—Detection Range
ac Termination Impedance Programming Range
On- and Off-hook 2-wire Signal Level
Power Supply—Powerup, No Loop Current (per section):
I
CC
I
BAT
(V
BAT
= –65 V)
Total power (one channel, V
BAT
= –65 V)
Power-supply Rejection (See Figures 6 and 7.):
V
CC
(1 kHz)
V
BAT
(500 Hz—3 kHz)
Thermal
4
:
Thermal Resistance (still air) T
j
Operating T
j
Thermal Shutdown Temperature
1.
2.
3.
4.
Min
0
5
4.75
–24
2
9.5
300
—
—
—
—
35
45
—
—
—
Typ
—
—
5.0
–65
12
600
3.14
4.5
3.0
230
—
—
47
—
160
Max
70
95
1
5.25
–72
14.5
1000
3
—
5.5
4.0
290
—
—
—
150
—
Unit
°C
%RH
V
V
mA
Ω
dBm
mA
mA
mW
dB
dB
°C/W
°C
°C
Noncondensing.
The L8576B will operate below –24 V; –24 V is used for production test.
The termination impedance can be programmed up to 1200
Ω;
1000
Ω
are used for production test.
This parameter is not tested in production. It is guaranteed by design and device characterization.
Table 4. Ring Trip Detector
1
Parameter
2
Ringing Source:
Frequency (ƒ) R
RNG
= 28.7 kΩ, R
TTH
= 52.3 kΩ
Frequency (ƒ) Contact Agere for Specific Component Values
C-message Weighted Noise (900
Ω)
REN Load (1386
Ω
+ 40
µF)
with Loop Resistance = 30
Ω,
R
PT
= 30
Ω,
R
PR
= 30
Ω
Detection Interval:
20 Hz
≥25
Hz
1. This table is provided for information purposes only.
2. These parameters are not tested in production.
Min Typ
17
20
—
—
—
—
20
—
—
—
—
—
Max
23
50
90
40
200
150
Unit
Hz
Hz
dBrnC
Vrms
ms
ms
10
Agere Systems Inc.
AGERE [ AGERE SYSTEMS ]
