GENERAL DESCRIPTION
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.

FEATURES
Line interface
• Low DC line voltage; operates down to 1.2 V (excluding polarity guard)
• Voltage regulator with adjustable DC voltage
• DC mask for voltage or current regulation (CTR21)
• Line current limitation for protection
• Electronic hook switch control input
• Transmit amplifier with:
    – Symmetrical inputs
    – Fixed gain
    – Large signal handling capability.
• Receive amplifier with fixed gain
• Transmit and receive amplifiers Automatic Gain Control (AGC) for line loss compensation.

APPLICATIONS
• Cordless base stations
• Mains or battery-powered telephone sets.