ISL5585_04 Datasheet, PDF (1/24 Pages) Intersil Corporation – 3.3V Ringing SLIC Family for Voice Over Broadband (VOB)

ISL5585
®
Data Sheet
October 21, 2004
FN6026.6
3.3V Ringing SLIC Family for Voice Over
Broadband (VOB)
The 3.3V family of ringing subscriber line interface circuits
(SLIC) supports analog Plain Old Telephone Service (POTS)
in short and medium loop length, wireless and wireline voice
over broadband applications. Ideally suited for customer
premise equipment, this family of products offers flexibility to
designers with high ringing voltage and low power
consumption system requirements.
The ISL5585 family is capable of operating with 100V ringing
battery supply, which translates directly to the amount of
ringing voltage supplied to the subscriber. With the high
operating voltage, subscriber loop lengths can be extended
to 500Ω (i.e., 5,000 feet) and beyond, allowing this family to
serve emerging Fiber In The Loop (FITL) markets.
Other key features across the product family include: 3.3V
V_CC operation, low power consumption, ringing using
sinusoidal or trapezoidal waveforms, robust auto-detection
mechanisms for when subscribers go on or off hook, and
minimal external discrete application components.
Integrated test access features are also offered on selected
products to support loopback testing as well as line
measurement tests.
There are ten product offerings of the ISL5585 providing
various grades of ringing battery voltage and longitudinal
balance.
Block Diagram
POL CDC
VBL VBH
ILIM
DC
CONTROL
BATTERY
SWITCH
RINGING
PORT
VRS
TIP
RING
TL
2-WIRE
PORT
TRANSIENT
CURRENT
LIMIT
SW+
SW-
TEST
ACCESS
TRANSMIT
SENSING
4-WIRE
PORT
AUX
VTX
-IN
VFB
DETECTOR
LOGIC
F2
CONTROL
LOGIC
F1
F0
RT SH E0 DET ALM BSEL SWC
Features
• 3.3V Operation
• Onboard Ringing Generation
• Low Standby Power Consumption (75V, 65mW)
• Programmable Transient Current Limit
• Improved Off Hook Software Interface
• Integrated MTU DC Characteristics
• Low External Component Count
• Silent Polarity Reversal
• Pulse Metering and On Hook Transmission
• Tip Open Ground Start Operation
• Balanced and Unbalanced Ringing
• Thermal Shutdown with Alarm Indicator
• 28 Lead Surface Mount Packaging
• QFN Package:
- Compliant to JEDEC PUB95 MO-220
QFN - Quad Flat No Leads - Package Outline
- Near Chip Scale Package footprint, which improves
PCB efficiency and has a thinner profile
• Pb-Free Available (RoHS Compliant)
Applications
• Short Loop Access Platforms
• Voice Over Internet Protocol (VoIP)
• Voice Over Cable and DSL Modems
• Internet Protocol PBX
• FiberTo The Home (FTTH)
• Remote Subscriber Units
• Ethernet Terminal Adapters
Related Literature
• AN1038, User’s Guide for Development Board
• AN9824, Modeling of the AC Loop
• TB379 Thermal Characterization of Packages for ICs
• AN9922, Thermal Characterization and Modeling of the
RSLIC18 in the Micro Leadframe Package
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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