1

®

FN4924.2

ISL5586

Low Power Ringing SLIC for Home

Gateways

The ISL5586 is a very low

power Ringing Subscriber

Interface circuit designed for

use with the Broadcom

BCM3352 Cable Modem Chip,

with on-board voiceband codecs, or other 3.3V voiceband

codec devices.

The ISL5586 provides on board ringing signal generation up

to 95V peak supporting sinusoidal or trapezoidal

waveshapes with DC offset. Loop start and ground start

trunks are supported, and an open circuit DC voltage of less

than 56V is maintained on the subscriber loop in the on-hook

condition, in compliance with MTU operation and the safety

requirements of UL-1950.

Together with the Broadcom BCM3352, the ISL5586

provides resistive and complex two wire impedance

matching and transhybrid balancing. Also supported are on-

hook transmission of caller id signals, soft and hard polarity

reversal and 12/16kHz subscriber pulse metering systems

used in Europe and Asia, thereby allowing a low cost, low

risk, global product design to be achieved.

Related Literature

• Evaluation Board for the ISL5586 family AN9918

• Technical Brief TB363 “Guidelines for Handling and

Processing Moisture Sensitive Surface Mount Devices

(SMDs)”

Features

• Interfaces to Broadcom 3352 cable modem device

• Very low on-hook power consumption

- 64mW @ Vbh = 75V

• User Programmable constant current to the subscriber

loop

• On Chip ring generation

- Balanced to 95Vpk

• Sinewave, Trapezoid, DC offset

• Programmable loop start and ring trip detectors

• Loop start, Ground Start, Polarity Reversal (soft/hard)

• On-Hook transmission and pulse metering support

• Integrated battery switch

• Open circuit line voltage clamp

• Compatible with 3.3V devices

• TR-57 compliant Longitudinal balance

• 28 PLCC packaging

• Latch-up free Bipolar design

• Thermal protection

• Pb-Free Available (RoHS Compliant)

Applications

• Cable Modems

• Voice Over DSL (VoDSL)

• Broadband Wireless Access

• Voice Over Internet Protocol (VoIP)

• ISDN Terminal Adapters (TA)

• Small Office Home Office PBX

• Wireless Local Loop

Block Diagram

-IN

F2

F1

F0

ILIM

RTD

DET

RINGING

PORT

4-WIRE

PORT

CONTROL

LOGIC

BATTERY

SWITCH

TRANSMIT

SENSING

DETECTOR

LOGIC

DC

CONTROL

2-WIRE

PORT

INTERNAL

LOOP BACK

POL

CDCM

BSEL

TRANSIENT

CURRENT

LIMIT

TIP

RING

TL

RD

CDCP

Data Sheet

November 3, 2004

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

1-888-INTERSIL or 321-724-7143

Copyright Intersil Americas Inc. 2000, 2001, 2004. All Rights Reserved

RSLIC18™ is a trademark of Intersil Corporation. All other trademarks mentioned are the property of their respective owners.