LUCL9500AGF-D datasheet(9/32 Pages) AGERE

9 / 32 page

Preliminary Data Sheet

September 2001

High-Voltage Ringing SLIC for VoIP Applications

L9500A

Agere Systems Inc.

Pin Information (continued)

Table 1. Pin Descriptions (continued)

Operating States

Table 2. Control States

Table 3. Supervision Coding

28-Pin

PLCC

48-Pin

MLCC

Symbol

Type

Name/Function

FB2

—

Polarity Reversal Slowdown Capacitor. Connect a capacitor

from this node for controlling rate of battery reversal. If ramped bat-

tery reversal is not desired, this pin is left open.

FB1

—

Polarity Reversal Slowdown Capacitor. Connect a capacitor

from this node for controlling rate of battery reversal. If ramped bat-

tery reversal is not desired, this pin is left open.

I/O

Protected Tip. The output drive of the tip amplifier and input to the

loop sensing circuit. Connect to loop through overvoltage and

overcurrent protection.

I/O

Protected Ring. The output drive of the ring amplifier and input to

the loop sensing circuit. Connect to loop through overvoltage and

overcurrent protection.

State Control Input. These pins have an internal 100 k

Ω pull-up.

State Control Input. These pins have an internal 100 k

Ω pull-up.

State Control Input. These pins have an internal 100 k

Ω pull-up.

ITR

Transmit Gain. Input to AX amplifier. Connect a 4.75 k

Ω resistor

from this node to VTX to set transmit gain. Gain shaping for termi-

nation impedance with a first generation codec is also achieved

with a network from this node to VTX.

VTX

ac Output Voltage. Output of internal AX amplifier. The voltage at

this pin is directly proportional to the differential tip/ring current.

TXI

ac/dc Separation. Input to internal AAC amplifier. Connect a

0.1

µF capacitor from this pin to VTX.

State

Forward active

Reverse active

On-hook transmission forward battery

On-hook transmission reverse battery

Ground start

Scan

Disconnect—device will power up in this state

Ring

NSTAT

0 = off-hook or ring trip or thermal shutdown or ring ground.

1 = on-hook and no ring trip and no thermal shutdown and no ring ground.

LUCL9500AGF-D 데이터시트(PDF) 9 Page - Agere Systems

LUCL9500AGF-D 데이터시트(HTML) 9 Page - Agere Systems

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

데이터시트 다운로드

링크 URL