L3936AD 데이터 시트보기 (PDF) - STMicroelectronics

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L3936AD

SPEECH AND 14 MEMORY DIALER WITH LED DRIVER

STMicroelectronics 

L3916A

L3926A - L3936A

SPEECH AND 14 MEMORY DIALER WITH LED DRIVER

ADVANCE DATA

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 CUR-

RENT FOR EXTERNAL CIRCUITRY

SYMMETRICAL HIGH IMPEDANCE MICRO-

PHONE 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

LIGHTED DIAL LED CONSUMING 25% OF

LINE CURRENT

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 INDI-

CATION 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 UN-

TIL KEY RELEASE

USES INEXPENSIVE 3.579545MHz CE-

RAMIC RESONATOR

POWERED FROM TELEPHONE LINE, LOW

OPERATING VOLTAGE FOR LONG LOOP

APPLICATION

DIP28

SO28

ORDERING NUMBERS:

L3916AN

L3916AD

L3926AN

L3926AD

L3936AN

L3936AD

PIN CONNECTION (Top view)

KEYPAD CONFIGURATION

DESCRIPTION

The device consists of the speech and the dialer.

It provides the DC line interface circuit that termi-

nates the telephone line, analog amplifier for

speech transmission and necessary signals for

either DTMF or loop disconnect (pulse) dialing.

Note: PAUSE/LND:

PAUSE and LND functions are sharing the same key with different

sequence. Hereafter, PAUSE and LND keys arereferring to the same

key.

January 1995

1/15

This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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