DESCRIPTION
The TEA7088A is a Telephone Analog Front End device, TAFE, which integrates the three basic functionsof a standard telephoneset :
   - Speech network,
   - DTMF generator,
   - Ringer generator on buzzer.
A complete telephone set can be designed using TEA7088A associated with a low cost microcontroller.

■ RING
   - GENERATION OF 8 MELODY TONES
      (Including the 3 German Melody Tones)
   - 4 STEPS DIGITAL CONTROL ON THE AM PLIFIER OUTPUT LEVEL
■ SPEECH
   - TRANSMIT GAIN EXTERNALLY ADJUSTABLE
   - RECEIVING GAIN EXTERNALLY ADJUSTABLE
   - AGC SLOPE EXTERNALLY PROGRAMMABLE
   - SOFTCLIPPING ON SENDING CHANNEL
   - RECEIVE AMPLIFIER FOR PIEZO OR ELECTRODYNAMIC TRANSDUCER
   - +6dB MODE ON RECEIVE CHANNEL
   - LINE POWER MANAGEMENT
■ DIALING
   - DTMF GENERATOR
   - LOW DC MASK DURING MAKE PERIOD THROUGH MICROCONTROLLER SERIAL BUS INTERFACE
■ MICROCONTROLLER INTERFACE
   - 1.79MHzCLOCK OR 3.58MHz OSCILLATOR INPUT
■ MICROCONTROLLER POWER SUPPLY
■ MICROCONTROLLER CONTROL INTERFACE INCLUDING SERIAL BUS
■ LINE CURRENT EXTRACTOR FOR SUPPLY OF EXTERNAL PERIPHERALS