EM91420B Overview
The EM91420 is a series of tone/pulse switchable dialers that is posed of T/P dialer and T/P dialer with 20-set memories. The EM91420 series provides 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.
EM91420B Key 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, Fla
- 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
- 20-set three touch repertory memory, each one can hold data up to 16 digits