TEA7540FP 查看數據表（PDF） - STMicroelectronics

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TEA7540FP

MONITOR AMPLIFIER

STMicroelectronics 

TEA7540

TEA7540 OPERATION

TEA7540 is powered through an external shunt

regulator (for instance the shunt regulator of the

monitor amplifier TEA7532) or an external zener

diode.

It can work at a very low voltage (2.5V) over the

circuit and it has a low current consumption

(2.1mA).

It’s also possible via the chip select pin (CS) to

put the handsfree function in standby to use the

circuit in monitoring mode with the handset micro-

phone.

TEA7540 is designed to work with all kind of mi-

crophone, including Electret.

TEA7540 also handles the handset microphone

signal (AMP IN) when the system is set to normal

conversation mode.

Figure C: Application Diagram (Example of high range telephone set using TEA7540).

ABSOLUTE MAXIMUM RATINGS

Symbol

V+

Top

Tstg

Parameter

Supply Voltage

Operating Temperature

Storage Temperature Range

Value

Unit

12

V

-20 to 70

°C

-65 to 125

°C

5/12

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