TEA1064BT - NXP

TEA1064BT Low voltage versatile telephone transmission

The TEA1064B is a bipolar integrated circuit that performs all the speech and line interface functions required in fully electronic telephone sets. It performs electronic switching between dialling and speech. The IC operates at line voltages down to 1.8 V DC (with reduced performance) to facilitate the use of more telephone sets connected in parallel. The t.

Features

• Low DC line voltage; operates down to 1.8 V (excluding polarity guard)
• Voltage regulator with low voltage drop and adjustable static resistance
• DC line voltage adjustment facility
• Provides a supply for external circuits
• Dynamic limiting (speech-controlled) in transmit direction prevents distortion of line signal and sidetone
• Symmetrical high-impedance inputs (64 kΩ) for dynamic, magnetic or piezo-electric microphones
• Asymmetrical high-impedance input (32 kΩ) for electret microphones
• DTMF signal input
• Confidence tone in the earpiece during DTMF dialling
• Mute input for disabl.