HC55171

HC55171 Data Sheet July 1998 File Number 4323.4 5 REN Ringing SLIC for ISDN Modem/TA and WLL The HC55171 is backward compatible to the HC5517 with the added capability of driving 5 REN loads. The HC55171 is ideal for any modem or remote networking access application that requires plain old telephone service POTS, capability. The linear amplifier design allows a choice of Sinusoidal, Square wave or Trapezoidal ringing. The voltage feed architecture eliminates the need for a high current gain node achieving improved system noise immunity, an advantage in highly integrated systems. The device is manufactured in a high voltage Dielectric Isolation (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. Features 5 REN Thru SLIC Ringing Capability to 75VPEAK Trapezoid, Square and Sinusoid Ringing Capability Bellcore Compliant Ringing Voltage Levels Lowest Component Count Trapezoidal Solution Single Additional +5V Supply Pin For Pin Compatible With HC5517 DI Provides Latch-Up Immunity Applications ISDN Internal/External Modems ISDN Terminal Adapters/Routers Wireless Local Loop Subscriber Terminals Cable Telephony Set-Top Boxes Digital Added Main Line Ordering Information PART NUMBER HC55171IM HC55171CM HC55171IB HC55171CB TEMP. RANGE (oC) -40 to 85 0 to 75 -40 to 85 0 to 75 PACKAGE 28 Ld PLCC 28 Ld PLCC 28 Ld ...