ISL5586
TM
Data Sheet
June 2001
File Number 4924.1
Low Power Ringing SLIC for Home
Gateways
Features
• Interfaces to Broadcom 3352 cable modem device
• Very low on-hook power consumption
- 64mW @ Vbh = 75V
The ISL5586 is a very low
power Ringing Subscriber
Interface circuit designed for
• User Programmable constant current to the subscriber
loop
use with the Broadcom*
BCM3352 Cable Modem
• On Chip ring generation
Chip, with on-board voiceband codecs, or other 3.3V
voiceband codec devices.
- Balanced to 95 Vpk
• 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
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.
• Open circuit line voltage clamp
• Compatible with 3.3V devices
• TR-57 compliant Longitudinal balance
• 28 PLCC packaging
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.
• Latch-up free Bipolar design
• Thermal protection
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
Related Literature
• Evaluation Board for the ISL5586 family AN9918
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
Block Diagram
POL CDCP CDCM
V
V
BH
BL
BATTERY
SWITCH
DC
CONTROL
V
V
RINGING
PORT
RSP
RSM
ILIM
V
V
RXP
RXM
TIP
2-WIRE
PORT
RING
-IN
TRANSMIT
SENSING
4-WIRE
PORT
TRANSIENT
CURRENT
LIMIT
V
V
ZO
FB
TL
V
V
TXP
TXM
F2
F1
F0
INTERNAL
DETECTOR
LOGIC
CONTROL
LOGIC
LOOP BACK
RTD RD
DET
BSEL
*Broadcom is a registered trademark of Broadcom Corp.
RSLIC18™ is a trademark of Intersil Corporation.
4-1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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