UM9151-3

The UM9151-3 is designed as pulse dialer which is a monolithic CMOS integrated circuit which converts pushbutton inputs to a series of pulses suitable for telephone dialing. It is intended to replace mechanical telephone dialers and can operate directly from telephone lines.

UM9151-3 has many features. The first one is direct telephone line operation. The second one is 4 x 3 matrix keyboard interface. The third one is supply voltage range 2.0V to 5.5V. The fourth one is inexpensive RC oscillator. The fifth one is low power standby mode for redial. The sixth one is 22-digit capacity for redial. The seventh one is redial with ether * or # key. The eighth one is dialer reset for line power break larger than 200msec. The ninth one is inter-digit pause 800ms. The tenth one is selectable make/break ratio. The eleventh one is provision rapid testing (high speed test capacity). The twelfth one is 16 lead dual in line package. That are all the main features.

Some absolute maximum ratings of UM9151-3 have been concluded into several points as follow. The first one is about its DC supply voltage (Vdd - Vss) which would be from -0.3V to 5.5V. The second one is about its operating temperature range which would be from -20°C to 60°C. The third one is about its storage temperature range which would be from -55°C to 125°C. It should be noted that stresses above those listed under "absolute maximum ratings" may cause permanent damage to the device.

And some electrical characteristics about UM9151-3. The first one is about its operating current which would be typ 8.0uA and max 40uA no key-in and would be typ 30.0uA and max 200uA keboard key-in. The second one is about its operating voltage which would be min 2.0V and typ 3.9V and max 5.5V. The third one is about its keyboard inputs which would be min 40uA and typ 60uA and max 150uA. And so on For more information please contact us.