L9313 datasheet(8/40 Pages) AGERE

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Data Sheet

September 2001

Full-Feature SLIC and Ringing Relay for TR-57 Applications

L9313 Line Interface and Line Access Circuit

Agere Systems Inc.

Pin Information

12-3522g (F)

Figure 2. 44-Pin PLCC

Table 1. Pin Descriptions

Symbol

Type

Name/Function

LCTH

Loop Closure Program Input. Connect a voltage source to this point to program

the loop closure threshold. Voltage source may be external and must be connected

through a resistor, or derived via a resistor divider from VREF. A programmable

external voltage source may be used to provide software control of the loop closure

threshold.

2VREF

SLIC Internal Reference Voltage. Output of internal 2.35 V SLIC reference volt-

age.

3OVH

Overhead Voltage Program Input. Connect a voltage source to this point to pro-

gram the overhead voltage. Voltage source may be external or derived via a resistor

divider from VREF. A programmable external voltage source may be used to provide

software control of the overhead voltage. If a resistor or voltage source is not con-

nected, the overhead voltage will default to approximately 5.5 V (sufficient to pass

3.14 dBm in to 900

Ω). If the default overhead is desired, connect this pin to ground.

4VPROG

Current-Limit Program Input. Connect a voltage source to this point to program

the dc current limit. Voltage source may be external or derived via a resistor divider

from VREF. A programmable external voltage source may be used to provide soft-

ware control of the loop closure threshold.

5CF2

—

Filter Capacitor. Connect a capacitor from this node for filtering.

6CF1

—

Filter Capacitor. Connect a capacitor from this node to OVH to control the rate of

change of the overhead voltage. If controlled overhead is not desired, leave this

node open.

7FB2

—

Polarity Reversal Slowdown Capacitor. Connect a capacitor from this node to

ground to control the rate of battery reversal. If controlled battery reversal is not

desired, leave pin is open.

1 4443 4241 40

20 21 22 23 24 25 26 27 28

L9313AP

FB2

LCF

RPWR

VBAT1

BGND

TIE B

′

TIE A

′

FB1

BGND

TXI

ITR

ICM

RGDET

DGND

VDD

LATCH

RESET

VTX

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