L3000N datasheet(4/32 Pages) STMICROELECTRONICS

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PIN DESCRIPTION (L3092)

Name

Description

VOUT

Two wire unbalanced output carryng out the following signals reduced by 40:

1) DC voltage to perform the proper DC characteristic.

2) Ringing Signal

3) Voice Signal

RPC

AC line Impedance Adjustment Protection Resistances Compensation

Transmit Amplifier Output

COMP

Comparator Input. This is the input comparator that senses the line voltage in power down and in

automatic stand-by, allowing off hook detection in this mode.

AUT

Aut. Input. It is a part of the digital interface. Loaded when CS is low.

Master Reset Input. When it is connected to ground the SLIC is forced in power down. It has an

internal pull-up. (typ. 200K

Ω) (*)

PWON

Power on/power off input. This input is part of digital interface. Loaded when CS is low.

RING

Ring Enable Input. This input is part of the digital interface. Loaded when CS is low.

Chip Select Input.

GDK

Ground Key Output Enabled by CS Low.

ONHK

On Hook/off Hook Output Enabled by CS Low.

State control Signal 2.

State Control Signal 1. Combination of C1 and C2 define operating mode of the high voltage part.

RGIN

Low Level Ringing Signal Input.

CRT

Ring Trip Detection

Longitudinal Line Current Input

RDC

DC Feeding System

Transversal Line Current Input

ACDC

AC - DC Feedback Input.

VDD

Positive Supply Voltage, +5V.

REF

Bias Setting Pin.

VSS

Negative Supply Voltage, -5V.

GND

Analog and Digital Ground.

LIM

Limiting Current Selection Input. Loaded when CS is low.

PDO

Power Down Output. Driving the high voltage part L3000N through the bias resistor RH.

TX Amplifier Negative Input performig the two to four wire conversion. In case of application with

2nd Generation COMBO performing also the echo cancellation (ex TS5070/5071), this pin must

be connected to GND.

CAC

AC Feedback Input.

ZAC

AC Line Impedance Synthesis.

(*) Must be connected to a proper capacitor for power on reset or to VDD if not used. Should not be left open.

− Ia

100

+ Ib

100

L3000N - L3092

4/32

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