TEA1085 and TEA1085A are bipolar ICs which have been designed for use in line-powered telephone sets and provide a listening-in facility for the received line signal via a loudspeaker. Nearly all the line current can be used for powering the loudspeaker. The circuits incorporate a supply circuit, loudspeaker amplifier dynamic limiter, MUTE circuit, power-down facility and logic inputs for gain setting.
The Philips TEA1085 and TEA1085A are bipolar integrated circuits designed for use in line-powered telephone sets to provide a listening-in facility for the received line signal via a loudspeaker. These ICs incorporate a supply circuit, a loudspeaker amplifier with a dynamic limiter, a MUTE circuit, a power-down facility, and logic inputs for gain setting. They are intended for use in conjunction with a transmission circuit of the TEA1060 family.
| Input current range | 4 - 120 mA |
|---|---|
| Current consumption (PD = HIGH) | 55 mA |
| Voltage gain (SE) | 35 dB |
| Voltage gain (BTL) | 41 dB |
| Operating ambient temperature | -25 to +75 °C |
They are designed for use in line-powered telephone sets to provide a listening-in facility for the received line signal via a loudspeaker.
The ICs are intended for use in conjunction with a transmission circuit of the TEA1060 family.
The maximum input signal level is 450 mV(RMS) at Tamb = +25 °C.