TEA1064B is a low voltage versatile telephone transmission circuit with dialler interface and transmit level dynamic limiting
The TEA1064B is a bipolar integrated circuit designed to perform all speech and line interface functions required in fully electronic telephone sets. It operates at line voltages down to 1.8 V DC, facilitating the connection of multiple sets in parallel.
Key features include dynamic limiting (speech-controlled) in the transmit direction to prevent signal distortion, symmetrical high-impedance inputs for various microphone types, and DTMF signal input with a confidence tone function. The device also includes mute and power-down inputs to improve performance during dialling.
| Line current operating range (normal) | 11 - 140 mA |
|---|---|
| Line current operating range (reduced performance) | 2 - 11 mA |
| Microphone amplifier gain range | 44 - 52 dB |
| Receiving amplifier gain range | 20 = 45 dB |
| Operating ambient temperature range | -25 - +75 °C |
The circuit operates down to 1.8 V DC (excluding polarity guard) with reduced performance.
The IC supports dynamic, magnetic or piezo-electric microphones via symmetrical inputs, and electret microphones via an asymmetrical input.
Yes, it includes a MUTE input for disabling speech during pulse or DTMF dialling.