●GENERAL DESCRIPTION
●The EM91403 is a series of tone/pulse switchable dialers that is composed of T/P dialer and T/P dialer with 3 sets memories. The EM91403 series provide necessary functions of telephone set for application in any environment, such as Pulse dialing, Tone (DTMF) dialing, Handfree dialing, keying tone ,and lock functions.
●The lock function is designed to inhibit toll dialing operation. Beside this, melody generator, ring detector and SDO (Serial Data Output) functions are provided in advance version.
●FEATURES
●• Tone/Pulse switchable.
●• Wide operating voltage from 2.0 V to 5.5 V.
●• Low operating current, 0.15 mA (Pulse) and 0.3 mA (Tone) typically.
●• Adding resistor on keyboard scan pin that can select many telephone specifications, such as : Pulse rate, M/B ratio, Flash time, lock dialing functions.
●• SDO function supports LCD driver and voice synthesizer to indicate dialing numbers.
●• Line hold function is designed for stopping conversation temporality.
●• Melody generator provides music on hold function.
●• Lock function provides conventionality key lock and password lock operations.
●• Ring detector is designed to prevent illegal dialing from pocket dialer.
●• 3-set one touch repertory memory, each one can hold data up to 16 digits.
●• A 32-digit LNB (last number) redial memory.
●• Keytone function provides rapidly keying recognition.
●• Handfree function provides on-hook dialing and speakerphone application.
●• Pause and P-T time are fixed to 3.6 seconds.
●• Tone duration and inter-tone pause time are fixed to 98 ms.
●• Using 3.579545 MHz crystal or ceramic resonator.
●• Package forms: PDIP, skinny.
