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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999

HC5523

LSSGR/TR57 CO/Loop Carrier SLIC with

Low Power Standby

The HC5523 is a subscriber line interface circuit which is

interchangeable with Ericsson’s PBL3764A/4 for distributed

central office applications. Enhancements include immunity

to circuit latch-up during hot plug and absence of false

signaling in the presence of longitudinal currents.

The HC5523 is fabricated in a High Voltage Dielectrically

Isolated (DI) Bipolar Process that eliminates leakage

currents and device latch-up problems normally associated

with junction isolated ICs. The elimination of the leakage

currents results in improved circuit performance for wide

temperature extremes. The latch free benefit of the DI

process guarantees operation under adverse transient

conditions. This process feature makes the HC5523 ideally

suited for use in harsh outdoor environments.

Features

• DI Monolithic High Voltage Process

• Programmable Current Feed (20mA to 60mA)

• Programmable Loop Current Detector Threshold and

Battery Feed Characteristics

• Ground Key and Ring Trip Detection

• Compatible with Ericsson’s PBL3764A/4

• Thermal Shutdown

• On-Hook Transmission

• Wide Battery Voltage Range (-24V to -58V)

• Low Standby Power

• Meets TR-NWT-000057 Transmission Requirements

Applications

• Digital Loop Carrier Systems

• Pair Gain

• Fiber-In-The-Loop ONUs

• POTS

• Wireless Local Loop

• PABX

• Hybrid Fiber Coax

• Related Literature

- AN9632, Operation of the HC5523/15 Evaluation Board

Block Diagram

Ordering Information

PART NUMBER

TEMP.

PACKAGE

PKG.

NO.

HC5523IM

-40 to 85

28 Ld PLCC

N28.45

HC5523IP

-40 to 85

22 Ld PDIP

E22.4

RINGRLY

DT

DR

TIP

RING

HPT

HPR

AGND

BGND

RSN

E0

E1

C1

C2

DET

RING RELAY

DRIVER

4-WIRE

INTERFACE

VF SIGNAL

PATH

GROUND KEY

DETECTOR

LOOP CURRENT

DETECTOR

RSG

BIAS

DIGITAL

MULTIPLEXER

RING TRIP

DETECTOR

2-WIRE

INTERFACE

Data Sheet

October 1998

File Number

4144.5