HC55180_05 Datasheet, PDF (1/21 Pages) Intersil Corporation – Extended Reach Ringing SLIC Family

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HC55180, HC55181, HC55183,
HC55184
July 13, 2005
FN4519.7
Extended Reach Ringing SLIC Family
The RSLIC18™ family of ringing subscriber line interface
circuits (RSLIC) supports analog Plain Old Telephone
Service (POTS) in short and medium loop length, wireless
and wireline applications. Ideally suited for remote
subscriber units, this family of products offers flexibility to
designers with high ringing voltage and low power
consumption system requirements.
The RSLIC18 family operates to 100V which translates
directly to the amount of ringing voltage supplied to the end
subscriber. With the high operating voltage, subscriber loop
lengths can be extended to 500Ω (i.e., 5,000 feet) and
beyond.
Other key features across the product family include: 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 five product offerings in the RSLIC18 family:
HC55180, HC55181, HC55183 and HC55184. The
architecture for this family is based on a voltage feed
amplifier design using low fixed loop gains to achieve high
analog performance with low susceptibility to system
induced noise.
Block Diagram
POL CDC
VBL VBH
ILIM
DC
CONTROL
BATTERY
SWITCH
RINGING
PORT
VRS
TIP
RING
2-WIRE
PORT
TRANSMIT
SENSING
4-WIRE
PORT
VRX
VTX
-IN
VFB
SW+
SW-
TEST
ACCESS
DETECTOR
LOGIC
F2
CONTROL
F1
LOGIC
F0
RTD RD E0 DET ALM BSEL SWC
Features
• Battery Operation to 100V
• Low Standby Power Consumption of 50mW
• Peak Ringing Amplitude 95V, 5 REN
• Sinusoidal or Trapezoidal Ringing Capability
• Integrated CODEC Ringing Interface
• Integrated MTU DC Characteristics
• Low External Component Count
• Pulse Metering and On Hook Transmission
• Tip Open Ground Start Operation
• Thermal Shutdown with Alarm Indicator
• 28 Lead Surface Mount Packaging
• Dielectric Isolated (DI) High Voltage Design
• HC55180
- Silent Polarity Reversal
- 53dB Longitudinal Balance
- Loopback Test Capability
• HC55181
- Integrated Battery Switch
- Silent Polarity Reversal
- 53dB Longitudinal Balance
- Loopback and Test Access Capability
• HC55183
- Integrated Battery Switch
- 45dB Longitudinal Balance
• HC55184
- Integrated Battery Switch
- Silent Polarity Reversal
- 45dB Longitudinal Balance
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Wireless Local Loop (WLL)
• Digital Added Main Line (DAML)/Pairgain
• Integrated Services Digital Network (ISDN)
• Small Office Home Office (SOHO) PBX
• Cable/Computer Telephony
Related Literature
• AN9814, User’s Guide for Development Board
• AN9824, Modeling of the AC Loop
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2003, 2005. All Rights Reserved
RSLIC18™ is a trademark of Intersil Corporation. All other trademarks mentioned are the property of their respective owners.