Brief Introduction

UBA-R4R-D10-1

<p>GENERAL DESCRIPTION</p><p>The UBA1706 is a BiCMOS integrated circuit intended for use in mains-powered telecom terminals. It performs all speech and line interface functions, DC mask for voltage or current regulation and electronic hook switch control. The device also includes general purpose switches.</p><p>FEATURES</p><p>Line interface</p><p>• Low DC line voltage; operates down to 1.2 V (excluding polarity guard)</p><p>• Voltage regulator with adjustable DC voltage</p><p>• DC mask for voltage or current regulation (CTR21)</p><p>• Line current limitation for protection</p><p>• Electronic hook switch control input</p><p>• Transmit amplifier with:</p><p>– Symmetrical inputs</p><p>– Fixed gain</p><p>– Large signal handling capability.</p><p>• Receive amplifier with fixed gain</p><p>• Transmit and receive amplifiers Automatic Gain Control (AGC) for line loss compensation.</p><p>APPLICATIONS</p><p>• Cordless base stations</p><p>• Mains or battery-powered telephone sets.</p>