DESCRIPTION

The SC9302 series tone/pulse dialers are CMOS LSIs for the telecommunication system. They are designed to meet various dialing specifications through resistor options matrix.

The SC9302 series tone/pulse dialers are offered in four different versions. They are SC9302X normal version, SC9302/F/G/H simple version, SC9302XT key-tone version and SC9302XLT key-tone/lock functions version. The SC9302X normal version provides the pin selected lock function; the SC9302XT version provides the key-tone function; the SC9302XLT version provides both the key-tone function and key board-operated IDD lock function. All of the above three versions also supply the following functions: Hold-line, Hand-free and LCD dialing number display interface, all of which are suitable for feature phone applications. However, the SC9302F/G/H version is simpler than the other three versions. It provides only a redialing memory for a simple low-cost system application.

FEATURES

* Universal specification

* Operating voltage: 2.0V~5.5V

* Low stand-by current

* Low memory retention current:0.1μA(Typ.)

* Tone/pulse switchable

* Interface with LCD driver

* 32 digits for redialing

* 32 digits for the SA memory dialing

* One-key redialing

* Pause and P→T key for PBX

* 4x4 keyboard matrix

* 3.58MHz crystal or ceramic resonator

* Hand-free control

* Hold-line control

* Pause, P→T can be saved for redialing

* Lock function

* Key tone function

* Resistor options:

- M/B ratio

- Flash function and flash time

- Pause and P→T duration

- Pulse number

- Keyboard operated IDD lock function