TONE/PULSE DIALER WITH REDIAL FUNCTION
DESCRIPTION
The UTC U9131X series are monolithic ICs that offer the dialing
signals in either pulse or tone mode. The UTC U9131X series
feature a redial memory.
FEATURES
* Uses 4×4 keyboard
* Pulse-to-tone (P→T) keypad for long distance call operation
* Easy operation with redial, flash, pause, and P→T keypads
* 32 digits for redial memory
* Flash, Pause, P→T (pulse-to-tone) can be stored as a digit in memory
* Switchable dialing mode：DTMF/Pulse
* Switchable beak/make ratio
* Minimum tone output duration: 100mS
* Minimum intertone pause: 100mS
* On-chip power-on reset
* Uses 3.579545MHz crystal or ceramic resonator |
