Features

• Wide Operating Battery Range (-21V to -44V)

• Single Additional +5V Supply

• 25mA Short Loop Current Limit

• Ring Relay Driver

• Switch Hook and Ring Trip Detect

• Low On-Hook Power Consumption

• On-Hook Transmission

• ITU-T Longitudinal Balance Performance

• Loop Power Denial Function

• Thermal Protection

• Supports Tip, Ring or Balanced Ringing Schemes

• Low Profile Surface Mount Packaging

• Pin Compatible with Industry Standard HC5504B SLIC

• Pb-free Available

Applications

• Analog Subscriber Line Interfaces in Analog Key Systems

and Digital ISDN PABX Systems

• Related Literature

- AN571, Using Ring Sync with HC-5502A and HC-5504

SLICs