DESCRIPTION
●The UTC TEA1110Ais a versatile telephone transmission circuit providing full speech and line interface functions in electronic telephone sets. This device works at a line voltage which can be as low as 1.6V DC (with reduced performance) to enable parallel connection of telephone sets. It also realizes electronic switching between speeches and dialling.
●FEATURES
● Low DC line voltage; operates downto 1.6V (excluding voltage drop over external polarity guard)
● Voltage regulator with adjustable DC voltage
● Provides a supply for external circuits
● Symmetrical high impedance inputs (64kΩ) for dynamic, magnetic or piezo-electric microphones
● Asymmetrical high impedance input (32kΩ) for electric microphones
● DTMF input with confidence tone
● MUTE input for pulse or DTMF dialling
● Receiving amplifier for dynamic, magnetic or piezo-electric earpieces
● AGC line loss compensation for microphone and earpiece amplifiers.
