GENERAL DESCRIPTION
The TEA1068 is a bipolar integrated circuit performing all speech and line interface functions required in fully electronic telephone sets. It performs electronic switching between dialling and speech.
FEATURES
⢠Voltage regulator with adjustable static resistance
⢠Provides supply for external circuitry
⢠Symmetrical high-impedance inputs (64 kâ¦) for
dynamic, magnetic or piezoelectric microphones
⢠Asymmetrical high-impedance input (32 kâ¦) for electret
microphone
⢠Dual-Tone Multi-Frequency (DTMF) signal input with
confidence tone
⢠Mute input for pulse or DTMF dialling
⢠Power down input for pulse dial or register recall
⢠Receiving amplifier for magnetic, dynamic or
piezoelectric earpieces
⢠Large gain setting range on microphone and earpiece
amplifiers
⢠Line current-dependent line loss compensation facility
for microphone and earpiece amplifiers
⢠Gain control adaptable to exchange supply
⢠DC line voltage adjustment facility.
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