Data Sheet
October 1997
L7591 Subscriber Line Interface Circuit Protector
Electrical Specifications (TA = 25 °C)
The minimum and/or maximum limits specified for the parameters are based on the absolute system. The alge-
braic sign only applies to the direction of the parameter. These requirements apply to either the TIP or RING termi-
nal; however, the device is capable of simultaneous Tip and Ring surges and continuous current, as noted below in
Tip and Ring leads. See Figure 3 and Table 5 for symbol and test condition definition.
Table 2. Electrical Characteristics D1 and D2
Characteristic
Symbol
Test Conditions
Min Typ Max Unit
Forward Voltage
VF
IP = 5 A, tP = 1 ms
—
—
1.6
5.2
3
V
V
Peak Forward Voltage
VFP
IPP = 30 A, 10 x 1000 µs
15
Table 3. Electrical Characteristics, PNPN Circuitry
Characteristic
Symbol
Test Conditions
Min
Typ
Max
Unit
Gate Trigger Current
Holding Current
Trip Voltage
IGT
IH
VS = 48 V
tP = 10 ms, VS = 48 V
dc
0.2
–150
—
—
15
—
mA
mA
V
–250
VT
VS –2.0 VS –2.8
Dynamic Trip Voltage
VSGL
IPP = 30 A, VS = –48 V,
—
–51
–63
V
10 x 1000 µs
Reverse Leakage Current:
VS to Tip or Ring
TA = 25 °C
IRG
VS = –75 V
—
—
—
—
—
—
0.12
—
5
50
µA
µA
TA = 70 °C
dv/dt Sensitivity
On-state Voltage:
IT = 0.5 A
—
VON
—
Tip or Ring Lead
±1000
—
—
V/µs
tP = 1 ms
—
—
—
—
–1.3
–2.3
—
—
V
V
IT = 3.0 A
—
Table 4. Electrical Characteristics, Diode and PNPN Circuitry
Characteristic
Symbol
Test Conditions
Min
Typ
Max
Unit
Reverse Leakage Current:
(Gate Open)
IR
VR = –85 V
TA = 25 °C
TA = 70 °C
—
—
—
—
—
—
0.14
—
5
50
µA
µA
Off-state Capacitance:
VR = –3 V
Coff
—
—
f = 1 MHz
—
—
—
—
50
40
—
—
pF
pF
VR = –48 V
Lucent Technologies Inc.
3
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