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L3934AN Datasheet (PDF) - STMicroelectronics

L3934AN Datasheet PDF - STMicroelectronics
Part # L3934AN
Download  L3934AN Download

File Size   188.63 Kbytes
Page   15 Pages
Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics
Description SPEECH AND 14 MEMORY DIALER WITH HOLD FUNCTION

L3934AN Datasheet (PDF)

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L3934AN Datasheet PDF - STMicroelectronics

Part # L3934AN
Download  L3934AN Click to download

File Size   188.63 Kbytes
Page   15 Pages
Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics
Description SPEECH AND 14 MEMORY DIALER WITH HOLD FUNCTION

L3934AN Datasheet (HTML) - STMicroelectronics

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L3934AN Product details

DESCRIPTION

The device consists of the speech and the dialer. It provides the DC line interface circuit that terminates the telephone line, analog amplifier for speech transmission and necessary signals for either DTMF or loop disconnect (pulse) dialing.



SPEECH CIRCUIT

■ 2 TO 4 WIRES CONVERSION

■ PRESENT THE PROPER DC PATH FOR THE LINE CURRENT AND THE FLEXIBILITY TO ADJUST IT AND ALLOW PARALLEL PHONE OPERATION

■ PROVIDES SUPPLY WITH LIMITED CURRENT FOR EXTERNAL CIRCUITRY

■ SYMMETRICAL HIGH IMPEDANCE MICROPHONE INPUTS SUITABLE FOR DYNAMIC ELECTRET OR PIEZOELECTRIC TRANSDUCER

■ ASYMMETRICAL EARPHONE OUTPUT SUITABLE FOR DYNAMIC TRANSDUCER

■ LINE LOSS COMPENSATION

■ INTERNAL MUTING TO DISABLE SPEECH DURING DIALING

■ HOLD FUNCTION FOR PARALLEL PHONE WITH 400ms DELAY TO PREVENT FALSE RELEASE



DIALER CIRCUIT

■ 32 DIGITS FOR LAST NUMBER REDIAL BUFFER

■ 18 DIGITS FOR 13 MEMORY REDIAL

■ ALLOW MIXED MODE DIALING IN EITHER TONE OR PULSE MODE

■ PACIFIER TONE PROVIDES AUDIBLE INDICATION OF VALID KEY PRESSED IN A BUZZER OR/AND IN THE EARPHONE

■ TIMED PABX PAUSE

■ FLASH INITIATES TIMED BREAK: MASK OPTIONS WITH 585ms,300ms,100ms

■ CONTINUOUS TONE FOR EACH DIGIT UNTIL KEY RELEASE

■ USES INEXPENSIVE 3.579545MHz CERAMIC RESONATOR

■ POWERED FROM TELEPHONE LINE, LOW OPERATING VOLTAGE FOR LONG LOOP APPLICATION



 




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About STMicroelectronics


STMicroelectronics is a multinational electronics and semiconductor manufacturer based in Geneva, Switzerland.

The company offers a wide range of products including microcontrollers, sensors, power amplifiers, and integrated circuits for various applications in the automotive, industrial, and consumer markets.

Founded in 1987, STMicroelectronics has operations in over 100 countries and is one of the largest semiconductor companies in the world.

*This information is for general informational purposes only, we will not be liable for any loss or damage caused by the above information.




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