L7581 Ringing Access Switch
Data Sheet
November 1999
Protection (continued)
Integrated SLIC Protection (continued)
Table 11. Electrical Specifications, Protection Circuitry
Parameters Related to Diodes (in Diode Bridge)
Parameter
Test Condition
Measure
Min
Typ
Voltage Drop @ Continuous Cur- Apply ±dc current limit Forward
—
—
rent (50 Hz/60 Hz)
of break switches
Voltage
Voltage Drop @ Surge
Current
Apply ±dynamic cur- Forward
—
5
rent limit of break
Voltage
switches
Parameters Related to Protection SCR
Surge Current
Gate Trigger Current*†
—
—
—
—
—
—
—
25
Gate Trigger Current† Temperature
—
Coefficient
—
—
–0.5
Hold Current
—
—
70
—
Gate Trigger Voltage
Trigger current
—
VBAT – 4 —
Reverse Leakage Current
ON-State Voltage§
VBAT
—
0.5 A, t = 0.5 µs
VON
2.0 A, t = 0.5 µs
—
—
—
—
–3
—
–5
Max
3
—
‡
50
—
VBAT – 2
1.0
—
—
Unit
V
V
A
mA
%/°C
mA
V
µA
V
V
* Previous versions of this data sheet specified a Trigger Current of 50 mA minimum. Trigger Current is defined as the minimum current drawn
from tip and ring to turn on the SCR. The specification in this data sheet is Gate Trigger Current, which is defined as the maximum current
that can flow into the battery before the SCR turns on.
† Typical at 25 °C.
‡ Twice ± dynamic current limit of break switches.
§ In some instances, the typical ON-state voltage can range as low as –25 V.
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Lucent Technologies Inc.