TEA1110A

DESCRIPTION 

The UTC TEA1110A is a versatile telephone transmission circuit 

providing full speech and line interface functions in electronic 

telephone sets. This device works at a line voltage which can be as 

low as 1.6V DC (with reduced performance) to enable parallel 

connection of telephone sets. It also realizes electronic switching

between speeches and dialling. 

The UTC TEA1110A is ideal for applications, such as line 

powered telephone sets, cordless telephones, and fax machines, 

answering machines. 

FEATURES 

* Low DC line voltage; operates down to 1.6V (excluding voltage 

drop over external polarity guard)

* Voltage regulator with adjustable DC voltage

* Provides a supply for external circuits

* Symmetrical high impedance inputs (64kΩ) for dynamic, magnetic 

or piezo-electric microphones

* Asymmetrical high impedance input (32kΩ) for electric 

microphones

* DTMF input with confidence tone

* MUTE input for pulse or DTMF dialling

* Receiving amplifier for dynamic, magnetic or piezo-electric 

earpieces

* AGC line loss compensation for microphone and earpiece 

amplifiers. 

规格书TEA1110A