Features• Pin for Pin Replacement for the HC-5504• Capable of +5V or +12V (VB+) Operation• Monolithic Integrated Device• DI High Voltage Process• Compatible With Worldwide PBX PerformanceRequirements• Controlled Supply of Battery Feed Current for ShortLoops (41mA)• Internal Ring Relay Driver• Allows Interfacing With Negative Superimposed RingingSystems• Low Power Consumption During Standby• Switch Hook Ground Key and Ring Trip DetectionFunctions• Selective Denial of Power to Subscriber LoopsApplications• Solid State Line Interface Circuit for Analog and DigitalPBX Systems• Direct Inward Dial (DID) Trunks• Voice Messaging PBXs• Allows Multi-Phone Operation
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