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.

特性 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

? Integrated LAN/PBX

? Related Literature

??? - AN9606, Operation of the HC5517/171 Evaluation Board

??? - AN9607, Impedance Matching Design Equations

??? - AN9628, AC Voltage Gain

??? - AN9608, Implementing Pulse Metering

??? - AN9636, Implementing an Analog Port for ISDN Using the HC5517

??? - AN549, The HC-5502X/4X Telephone Subscriber Line Interface Circuits (SLIC)