The HC55171 is backward compatible to the HC5517 withthe added capability of driving 5 REN loads. The HC55171 isideal for any modem or remote networking accessapplication that requires plain old telephone service POTS,capability. The linear amplifier design allows a choice ofSinusoidal, Square wave or Trapezoidal ringing. The voltagefeed architecture eliminates the need for a high current gainnode achieving improved system noise immunity, anadvantage in highly integrated systems.The device is manufactured in a high voltage DielectricIsolation (DI) process with an operating voltage range from-16V, for off-hook operation and -80V for ring signal injection.The DI process provides substrate latch up immunity,resulting in a robust system design.
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