Preliminary Data Sheet

September 2001

High-Voltage Ringing SLIC for VoIP Applications

L9500A

18

Agere Systems Inc.

Table 17. Ringing Specifications

Table 18. Ring Trip

Ringing will not be tripped by the following loads:

s

10 k

Ω resistor in parallel with a 6 µF capacitor applied across tip and ring. Ring frequency = 17 Hz to 23 Hz.

s

100

Ω resistor in series with a 2 µF capacitor applied across tip and ring. Ring frequency = 17 Hz to 23 Hz.

Parameter

Min

Typ

Max

Unit

Input Voltage Swing

Input Impedance

0

—

—

100

—

V

k

Ω

Ring Signal Isolation:

PT/PR to VTX

Ring Mode

—60

—

dB

Ring Signal Isolation:

Nonring Mode

—80

—

dB

Ring Signal Distortion:

5 REN 1380

Ω, 40 µF Load, 100 Ω Loop

—

3

—

%

Differential Gain:

Ω

115

128

140

—

Parameter

Min

Typ

Max

Unit

Ring Trip (NSTAT = 0):

100

—

600

Ω

Ring Trip (NSTAT = 1):

—

—

10

k

Ω

Trip Time (f = 20 Hz)

—

—

100

ms

Hysteresis

—

7

—

mA