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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
RSLIC18 is a trademark of Intersil Corporation.
http://www.intersil.com or 407-727-9207 | Copyright Intersil Corporation 1999
HC55180, HC55181, HC55182, HC55183, HC55184
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 500
(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, HC55182, 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
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
- 58/53dB Longitudinal Balance
- Loopback and Test Access Capability
HC55182
- Integrated Battery Switch
- 58/53dB Longitudinal Balance
- Loopback and Test Access Capability
HC55183
- Integrated Battery Switch
- 45dB Longitudinal Balance
HC55184
- Integrated Battery Switch
- Silent Polarity Reversal
- 45dB Longitudinal Balance
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
AN TBD, Interfacing to DSP CODECs
VRS
VRX
VTX
-IN
VFB
F2
F1
F0
ILIM
TIP
RING
SW+
SW-
RTD RD
DET ALM
RINGING
PORT
4-WIRE
PORT
CONTROL
LOGIC
BATTERY
SWITCH
TRANSMIT
SENSING
DETECTOR
LOGIC
DC
CONTROL
2-WIRE
PORT
TEST
ACCESS
E0
POL
CDC
VBH
VBL
BSEL
SWC
Data Sheet
October 1998
File Number
4519.4