L3914A Datasheet | STMicroelectronics

.. 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 PENSATION 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...