The UniSLIC14 is a family of Ultra Low Power SLICs. The feature set and common pinouts of the UniSLIC14 family positions it as a universal solution for: Plain Old Telephone Service (POTS), PBX, Central Office, Loop Carrier, Fiber in the Loop, ISDN-TA and NT1+, Pairgain and Wireless Local Loop.

Features
• Ultra Low Active Power (OHT) < 60mW
• Single/Dual Battery Operation
• Automatic Silent Battery Selection
• Power Management/Shutdown
• Battery Tracking Anti Clipping
• Single 5V Supply with 3V Compatible Logic
• Zero Crossing Ring Control
   - Zero Voltage On/Zero Current Off
• Tip/Ring Disconnect
• Pulse Metering Capability
• 4 Wire Loopback
• Programmable Current Feed
• Programmable Resistive Feed
• Programmable Loop Detect Threshold
• Programmable On-Hook and Off-Hook Overheads
• Programmable Overhead for Pulse Metering
• Programmable Polarity Reversal Time
• Selectable Transmit Gain 0dB/-6dB
• 2 Wire Impedance Set by Single Network
• Loop and Ground Key Detectors
• On-Hook Transmission
• Common Pinout
• Pb-Free Plus Anneal Available (RoHS Compliant)
• HC55121
- Polarity Reversal
• HC55130
   - -63dB Longitudinal Balance
• HC55140
   - Polarity Reversal
   - Ground Start
   - Line Voltage Measurement
   - 2 Wire Loopback
   - -63dB Longitudinal Balance
• HC55142
   - Polarity Reversal
   - Ground Start
   - Line Voltage Measurement
   - 2.2VRMS Pulse Metering
   - 2 Wire Loopback
• HC55150
   - Polarity Reversal
   - Line Voltage Measurement
   - 2.2VRMS Pulse Metering
   - 2 Wire Loopback