10

Lucent Technologies Inc.

Data Sheet

November 1999

L7581 Ringing Access Switch

Table 11. Electrical Specifications, Protection Circuitry

*

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.

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

—

—

—

—

‡

A

——

—

25

50

mA

Coefficient

—

—

—

–0.5

—

%/°C

Hold Current

—

—

70

—

mA

Gate Trigger Voltage

Trigger current

—

—

V

Reverse Leakage Current

——

—

1.0

µA

0.5 A, t = 0.5 µs

2.0 A, t = 0.5 µs

—

—

—

–3

–5

—

—

V

V