Key facts
- Brand
- Philips
- Model
- TEA1110A
- Documents
- 2
- Languages
- EN
- Last added
- 2012-07-04
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Philips TEA1110A Low Voltage Telephone Transmission Circuit Datasheet
The Philips TEA1110A is a bipolar integrated circuit designed for fully electronic telephone sets, cordless telephones, fax machines, and answering machines. It performs all speech and line interface functions, including electronic switching between speech and dialling, and operates at line voltages down to 1.6 V DC.
The device features symmetrical high impedance inputs for dynamic, magnetic, or piezo-electric microphones and an asymmetrical input for electret microphones. It includes a receiving amplifier for earpieces, automatic gain control (AGC) for line loss compensation, and a mute function to select between speech and dialling modes. The IC also supports DTMF input with a confidence tone.
Philips TEA1110A specifications
| Minimum DC line voltage | 1.6 V |
|---|---|
| Microphone input impedance | 64 kΩ |
| Electret microphone input impedance | 32 kΩ |
| Microphone amplifier voltage gain | 43.7 dB |
| Receiving amplifier voltage gain | 33 dB |
| DTMF input impedance | 20 kΩ |
| DTMF voltage gain | 25.3 dB |
| Package type | DIP14 |
Source: Philips TEA1110A Low Voltage Telephone Transmission Circuit Datasheet
All Philips TEA1110A documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What applications is the TEA1110A suitable for?
It is suitable for line powered telephone sets, cordless telephones, fax machines, and answering machines.
From: Philips TEA1110A Low Voltage Telephone Transmission Circuit Datasheet
How does the mute function work?
When MUTE is LOW, the DTMF input is enabled and amplifiers are disabled; when HIGH, amplifiers are enabled and DTMF is disabled.
From: Philips TEA1110A Low Voltage Telephone Transmission Circuit Datasheet
What is the minimum line voltage the TEA1110A can operate at?
The IC can operate with a line voltage as low as 1.6 V DC (excluding the voltage drop of the external polarity guard).
What does the MUTE pin do?
When MUTE is LOW, the DTMF input is enabled and the microphone and receiving amplifiers are disabled; when MUTE is HIGH, the microphone and receiving amplifiers are enabled and the DTMF input is disabled.