Data Sheet
November 1999
L7581 Ringing Access Switch
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
Max
Unit
Voltage Drop @ Continuous Cur-
rent (50 Hz/60 Hz)
Apply ±dc current limit
of break switches
Forward
Voltage
—
—
3
V
Voltage Drop @ Surge
Current
Apply ±dynamic cur-
rent limit of break
switches
Forward
Voltage
—
5
—
V
Parameters Related to Protection SCR
‡
Surge Current
Gate Trigger Current*†
—
—
—
—
—
—
—
—
—
—
25
A
50
—
mA
Gate Trigger Current† Temperature
Coefficient
–0.5
%/°C
Hold Current
—
Trigger current
VBAT
—
—
—
70
VBAT – 4
—
—
—
—
mA
V
Gate Trigger Voltage
Reverse Leakage Current
ON-State Voltage§
VBAT – 2
1.0
µA
0.5 A, t = 0.5 µs
2.0 A, t = 0.5 µs
VON
—
—
—
–3
–5
—
—
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.
10
Lucent Technologies Inc.
AGERE [ AGERE SYSTEMS ]
