TEA1113
FEATURES
- Low DC line voltage; operates down to 1.6 V (excluding polarity guard)
- Voltage regulator with adjustable DC voltage
- Provides a supply for external circuits
- Symmetrical high impedance inputs (64 kΩ) for dynamic, magnetic or piezo-electric microphones
- Asymmetrical high impedance input (32 kΩ) for electret microphones
- DTMF input with confidence tone
- MUTE input for pulse or DTMF dialling
- Receiving amplifier for dynamic, magnetic or piezo-electric earpieces
- Dynamic limitation in the transmit direction to prevent distortion of the transmit line and sidetone signals
- AGC line loss pensation for microphone and earpiece amplifiers
- LED on-hook/off-hook status indication
- Microphone mute function available with switch. GENERAL DESCRIPTION
APPLICATION
- Line powered telephone sets, cordless telephones, fax machines and answering machines.
The TEA1113 is a bipolar integrated circuit that performs all speech and line interface functions required in fully...
