HT1330

The HT1330 is a CMOS fabricated LSI chip designed to drive a standard three and 1/2 digit biplexed LCD for a count-up/down timer in watch applications. The watch and timer are based on a 32768Hz quartz crystal oscillator. The maximum count-down time is 20 hours with an accuracy of 1 second. The maximum count-up period is 20 hours, but the LCD HT1330 will normally display a maximum period of 19 minutes and 59 seconds. If the user presses switch "S2"the total count-up time in hours and minutes will be displayed. In the count-up/down mode, the real time can be seen by pressing switch "S1" and return to the count-up/down mode by releasing "S1"

Once the count-down is finished, the timer can either automatically recycle the preset time or manually reset the desired time depending on the selected bonding-pad option. The forecast alarm generates 4 alarm sounds at 10 minutes before set time and 8 alarm sounds at 5 minutes before set time. The HT1330 can be used as a parking timer, an alarm timer, a pill box timer, a kitchen timer, a sports timer, etc.