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TEA1085A Datasheet PDF - Philips Electronics

Part NameDescriptionManufacturer
TEA1085A Listening-in circuit for line-powered telephone sets Philips
Philips Electronics Philips
Other PDF  no available.
TEA1085A Datasheet PDF : TEA1085A pdf   
TEA1085AT image

The TEA1085 and TEA1085A are bipolar ICs which have been designed for use in line-powered telephone sets and provide a listening-in facility for the received line signal via a loudspeaker. Nearly all the line current can be used for powering the loudspeaker.

• Internal supply optimum current split-up
    - low constant current (adjustable) in transmission IC
    - nearly all line current available for listening-in adjustable supply voltage
• Loudspeaker amplifier dynamic limiter providing low distortion and the highest possible output power SE or BTL drive for loudspeaker volume control by potentiometer and/or logic inputs (e.g. microcontroller drive) fixed gain of 35 dB
• Larsen level limiter low sensitivity for own speech due to 3rd-order filter and attack delay adjustable voltage thresholds
• Power down input
• MUTE input
        - clickfree switching between listening-in mode and standby mode
        - toggle function
        - start-up in standby condition
        - logic level input


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