DESCRIPTION
The SC91710A/B are Tone/Pulse switchable dialer which are fabricated in COMS technology with wide operating voltage for both tone and pulse mode, and consumes very low memory retention current in ON-HOOK state.

FEATURES
* Tone/Pulse switchable dialer
* One 32-digit last number redial memory
* Pulse-to-tone (P→T) is provided for PBX operation
* Flash key is available
* Minimum tone duration is 98ms or 83ms
* Minimum intertone pause is 98ms or 83ms
* Redial Pause time (0ms)
* Uses 3.579549MHz crystal or ceramic resonator
* Many options can be selected
    Mode (10PPS; 20PPS; Tone)
    M/B ratio (40:60;33:66)
    Pause time (3.6s)
* Flash function (RESET) (P→T) pause time (3.6s)
    Flash time (600ms; 300ms; 100ms; or 80ms)
* Mixed dialing
* Power on reset circuit is provided
* Handfree function is provided for speaker phone application
* Packaged in 16-DIP or 18-DIP