L9218A データシートの表示（PDF） - Agere -> LSI Corporation
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L9218A Datasheet PDF : 30 Pages
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Data Sheet
November 2001
L9218A/G Low-Cost Line Interface
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
Symbol
Min
Typ
Max
Unit
5 V Power Supply
VCC
—
—
7.0
V
Battery (talking) Supply
VBAT
—
—
–75
V
Logic Input Voltage
—
–0.5
—
7.0
V
Analog Input Voltage
—
–7.0
—
7.0
V
Maximum Junction Temperature
TJ
150
—
—
°C
Storage Temperature Range
Tstg
–40
—
125
°C
Relative Humidity Range
RH
5
—
95
%
Ground Potential Difference (BGND to AGND)
—
—
±3
—
V
PT or PR Fault Voltage (dc)
VPT, VPR
VBAT – 5
—
3
V
PT or PR Fault Voltage (10 x 1000 µs)
VPT, VPR
VBAT – 15
—
15
V
Current into Ring Trip Inputs
IRTSP, IRTSN
—
±240
—
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.
7
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