Preliminary Data Sheet

September 2001

High-Voltage Ringing SLIC for VoIP Applications

L9500A

16

Agere Systems Inc.

Table 13. ac Feed Characteristics

1. Set externally either by discrete external components or a third- or fourth-generation codec. Any complex impedance R1 + R2 || C between

150

Ω and 1400 Ω can be synthesized.

2. This parameter is not tested in production. It is guaranteed by design and device characterization.

3. VITR transconductance depends on the resistor from ITR to VITR. This gain assumes an ideal 4750

Ω, the recommended value. Positive cur-

rent is defined as the differential current flowing from PT to PR.

Parameter

Min

Typ

Max

Unit

150

600

1400

Ω

Off-hook

On-hook

—

—

—

—

0.3

1.0

%

%

PT/PR Current to VITR

300 – 3%

300

300 + 3%

V/A

Receive Gain, f = 1004 Hz, 1020 Hz Open Loop

RCVP or RCVN to PT—PR

7.76

8

8.24

—

Ω Termination,

1004 Hz, 1020 Hz reference:

200 Hz—300 Hz

300 Hz—3.4 kHz

3.4 kHz—20 kHz

20 kHz—266 kHz

–0.3

–0.05

–3.0

—

0

0

0

—

0.05

0.05

0.05

2.0

dB

dB

dB

dB

–55 dB to +3.0 dB

–0.05

0

0.05

dB

Idle-channel Noise (tip/ring) 600

Ω Termination:

Psophometric

C-Message

3 kHz Flat

—

—

—

–82

8

—

–77

13

20

dBmp

dBrnC

dBrn

Idle-channel Noise (VTX) 600

Ω Termination:

Psophometric

C-Message

3 kHz Flat

—

—

—

–82

8

—

–77

13

20

dBmp

dBrnC

dBrn