L9219A Datasheet, PDF (7/30 Pages) Agere Systems – Low-Cost Line Interface with Reverse Battery and Dual Current Limit

Data Sheet
November 2001
L9219A/G Low-Cost Line Interface
with Reverse Battery and Dual Current Limit
Absolute Maximum Ratings (at TA = 25 °C)
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
Parameter
5 V Power Supply
Battery (Talking) Supply
Logic Input Voltage
Analog Input Voltage
Maximum Junction Temperature
Storage Temperature Range
Relative Humidity Range
Ground Potential Difference (BGND to AGND)
PT or PR Fault Voltage (dc)
PT or PR Fault Voltage (10 x 1000 µs)
Current into Ring Trip Inputs
Symbol
VCC
VBAT
—
—
TJ
Tstg
RH
—
VPT, VPR
VPT, VPR
IRTSP, IRTSN
Min
—
—
–0.5
–7.0
150
–40
5
—
VBAT – 5
VBAT – 15
—
Typ
—
—
—
—
—
—
—
±3
—
—
±240
Max
7.0
–75
7.0
7.0
—
125
95
—
3
15
—
Unit
V
V
V
V
°C
°C
%
V
V
V
µA
Note: The IC can be damaged unless all ground connections are applied before, and removed after, all other connections. Furthermore, when
powering the device, the user must guarantee that no external potential creates a voltage on any pin of the device that exceeds the
device ratings. Some of the known examples of conditions that cause such potentials during powerup are the following:
1. An inductor connected to tip and ring can force an overvoltage on VBAT through the protection devices if the VBAT connection chatters.
2. Inductance in the VBAT lead could resonate with the VBAT filter capacitor to cause a destructive overvoltage.
Recommended Operating Conditions
Parameter
Ambient Temperature
VCC Supply Voltage
VBAT Supply Voltage
Min
Typ
Max
Unit
–40
—
85
°C
4.75
5.0
5.25
V
–24
–48
–70
V
Agere Systems Inc.
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