TEA1114A is a low voltage telephone transmission circuit with dialler interface and regulated strong supply produced by Philips
The TEA1114A is a bipolar integrated circuit designed for fully electronic telephone sets, performing speech and line interface functions. It operates at line voltages down to 1.45 V DC and includes a regulated 3.3 V supply point for peripherals such as LCD modules and microcontrollers.
The IC features a transmit stage with a microphone amplifier and DTMF amplifier, and a receive stage with amplifiers for the earpiece and incoming signals. It supports applications in line-powered telephone sets with LCD modules, cordless telephones, fax machines, and answering machines.
| Line current operating range | 11 - 140 mA |
|---|---|
| DC line voltage | 405 - 465 V |
| Package type | DIP16 plastic dual in-line package |
The IC operates at a line voltage down to 1.45 V DC, though performance is reduced at this level.
The regulator delivers a stabilized voltage of 3.3 V for peripherals in both speech and ringer modes.