TEA1110A Overview
The UTC TEA1110A is 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.
TEA1110A Key Features
- Low DC line voltage; operates down to 1.6V (excluding voltage
- Voltage regulator with adjustable DC voltage
- Provides a supply for external circuits
- Symmetrical high impedance inputs (64kΩ) for dynamic, magnetic
- Asymmetrical high impedance input (32kΩ) for electric
- DTMF input with confidence tone
- MUTE input for pulse or DTMF dialling
- Receiving amplifier for dynamic, magnetic or piezo-electric
- AGC line loss pensation for microphone and earpiece
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