Description
The EM91420 is a series of tone/pulse switchable dialers that is composed of T/P dialer and T/P dialer with 20-set memories.
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.
EM91420B_ELANMicroelectronicsCorp.pdf