UBA1707 Datasheet | NXP Semiconductors

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 (CTR 21) - Line current limitation for protection - Electronic hook switch control input - Transmit amplifier with: - Symmetrical inputs - Fixed gain - Large signals handling capability. - Receive amplifier with fixed gain - Transmit and receive amplifiers AGC for line loss pensation. Auxiliary amplifier - Fixed gain. Loudspeaker channel - Dual inputs - Rail-to-rail output stage for single-ended load drive - High output current capability - Dynamic limiter to prevent distortion - Digital volume control - Fixed maximum gain. General purpose switches - Three switches with open-collector. 3-wires serial bus interface Allows to control: - DC mask (voltage or current regulation) - Receive amplifier mute function ORDERING INFORMATION TYPE NUMBER UBA1707T UBA1707TS PACKAGE NAME SO28 SSOP28 DESCRIPTION plastic small outline package; 28 leads; body width 7.5 mm plastic shrink small outline package; 28 leads; body width 5.3 mm - AGC: - On/off - Slope - Istart line current. - Auxiliary amplifier mute function - Loudspeaker channel: - Input selection - Volume setting - Dynamic limiter inhibition - Power-down mode. - General purpose switches state - Global power-down mode. Supply Operates with external supply voltage from 3.0 to 5.5 V. APPLICATIONS - Cordless base stations - Answering machines - Mains or battery-powered telephone sets. GENERAL DESCRIPTION The UBA1707 is a Bi CMOS integrated circuit intended for use in mains-powered tele terminals. It performs all speech and line interface functions, DC mask for voltage or current regulation and electronic hook switch control. The device includes an auxiliary amplifier, a loudspeaker channel and general purpose switches. Most of the characteristics are programmable via a 3-wire serial bus...