L3924A, L3914A Datasheet - ST Microelectronics

L3924A (L3914A - L3934A) SPEECH AND 14 MEMORY DIALER

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. January 1995 DIP28 SO28 ORDERING NUMBERS: L3914AN L3914A.

www.DataSheet4U.com L3914A L3924A - L3934A SPEECH AND 14 MEMORY DIALER WITH HOLD FUNCTION 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 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 COMPEN.

L3924A Features

* provided by the PABX or central office. The PAUSE key stores a timed pause in the number sequence. Redial is then delayed until an outside line can be accessed or some other activity occurs before normal signaling resumes. A LND key input automatically redials the last number dialed. The HOLD key al

L3914A_STMicroelectronics.pdf