L9313 datasheet(4/40 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.

Features

SLIC and solid-state ring relay integrated into a sin-

gle package

5 V and battery operation

User-defined power control options:

— Automatic battery switch

— Power control resistor

— Package thermal capabilities

Minimal external components required

Operating states:

— Forward active

— Reverse active (controlled rate of reversal)

— Scan

— Ground start (tip open)

— All-off or disconnect

— Ring

Ultralow power:

— Scan, 15 mW

— Active states, on-hook, 75 mW

— Ring mode, on-hook, 90 mW

— Disconnect, 10 mW

Adjustable overhead voltage:

— Overhead adequate for 3.14 dB into

900

Ω overload

— Controlled rate of overhead adjustment

Latched parallel input data interface with reset

Adjustable current limiter:

— 10 mA to 45 mA programming range

Adjustable loop closure detector with hysteresis:

— 4 mA detect, 2.5 mA no detect minimum, upper

limit of 15 mA detect

— Hysteresis, typical 20% of programmed on-hook

to off-hook threshold

Ring trip detector:

— Single-pole filtering

Thermal shutdown protection with hysteresis

Line break switch will foldover into a low-current

state under high-voltage fault conditions

Battery out-of-range monitor circuit:

— All-off upon loss of battery (low battery condition)

— All-off upon high battery (fault condition)

Longitudinal balance:

— TR-57 balance

Ground start:

— Tip open state

— Ring ground detector

RFI/EMC-CISP-22

Integrated 2 Form C ring relay:

— Low impulse noise

— Current-limited switches

— Break-before-make and make-before-break

switching

Meets

Telcordia Technologies

™ GR1089 require-

ments with external protection device

44-pin, surface-mount plastic package (PLCC)

Description

The L9313 electronic line interface and line access cir-

cuit (LILAC) provides all the functions that are neces-

sary to interface a codec to the tip and ring of a

subscriber loop, integrating the battery feed and ringing

access relay in one low-power, low-cost package. The

physical construction of the device is two chips. The

first chip is manufactured in Agere 90 V complemen-

tary bipolar integrated circuit (CBIC-S) technology. This

chip contains the SLIC functionality:

ac transmission path

dc feedback and functions

Active dc current limit

Active mode loop supervision

Thermal shutdown

The second chip is manufactured in Agere dielectrically

isolated 320 V bipolar CMOS diffused metal oxide

semiconductor (BCDMOS III) technology. This chip

contains the following:

Ring access relay

Scan clamp circuitry

Logic control

Ring trip

Thermal shutdown

Battery monitor circuit

The LILAC family requires a +5 V and battery supply to

operate. No –5 V supply is required. A battery switch is

included that automatically, based on subscriber loop

length, will apply either the primary higher-voltage bat-

tery or an optional lower-voltage auxiliary battery. Use

of this feature will minimize off-hook power dissipation.

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