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.

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