TEA1093
Key Features
- Line powered supply with: - adjustable stabilized supply voltage - power down function
- Microphone channel with: - externally adjustable gain - microphone mute function
- Loudspeaker channel with: - externally adjustable gain - dynamic limiter to prevent distortion - rail-to-rail output stages for single-ended or bridge-tied load drive - logarithmic volume control via linear potentiometer - loudspeaker mute function
- Duplex controller consisting of: - signal envelope and noise envelope monitors for both channels with: externally adjustable sensitivity externally adjustable signal envelope time constant externally adjustable noise envelope time constant - decision logic with: externally adjustable switch-over timing externally adjustable idle mode timing externally adjustable dial tone detector in receive channel - voice switch control with: adjustable switching range constant sum of gain during switching constant sum of gain at different volume settings. ORDERING INFORMATION PACKAGE TYPE NUMBER NAME TEA1093 TEA1093T DIP28 SO28 DESCRIPTION plastic dual in-line package; 28 leads (600 mil) plastic small outline package; 28 leads; body width 7.5 mm GENERAL DESCRIPTION APPLICATIONS
- Line-powered telephone sets with hands-free/listening-in functions. TEA1093 The TEA1093 is a bipolar circuit intended for use in line-powered telephone sets. In conjunction with a member of the TEA1060 family or PCA1070 transmission circuits, the device offers a hands-free function for line powered telephone sets. It incorporates a supply, a microphone channel, a loudspeaker channel and a duplex controller with signal and noise monitors on both channels.
