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
VRSP
VRXM
-IN
VFB
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
VBH
VBL
BSEL
TRANSIENT
CURRENT
LIMIT
TIP
RING
TL
RD
VRSM
VRXP
VTXP
VTXM
VZO
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
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
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.