HT2040A

www.DataSheet4U.com HT2040A Christmas Light Controller Features Operating voltage: 4.5V~5.5V 4 SCR direct drive outputs 10 different groups of lighting patterns Up to 8 patterns for each group Demonstration function One key activation function Up to 23 patterns can be programmed inside Built-in PLL circuit 50Hz or 60Hz AC power supply applications Default 12 patterns for standard applications General Description The HT2040A is a low cost, low power CMOS LSI chip designed for use in Christmas lighting control products. It provides 4 SCR outputs to control the lamps. The lamps can display up to 10 different groups of lighting patterns, where each pattern or pattern group is chosen by appropriate input keys. The available 10 groups of lighting patterns can all be displayed automatically or sequentially using a single key. (12 patterns and 10 pre-programmed groups are provided by default.) The internal PLL circuit allows synchronized control of the SCRs at either 50Hz or 60Hz AC supply voltage. Pin Assignment Block Diagram DataShee DataSheet4U.com 1 26th Mar ’97 DataSheet4U.com DataSheet 4 U .com www.DataSheet4U.com HT2040A Pad Coordinates Pad No. 1 2 3 4 5 6 7 8 Unit: mil X –46.47 –46.47 –46.47 –46.47 –46.47 –34.74 38.82 46.47 Y –0.17 –7.01 –14.66 –32.22 –42.59 –42.59 –42.59 –42.59 Pad No. 9 10 11 12 13 14 15 16 X Y 46.47 –23.89 46.47 –16.24 46.47 –4.51 46.47 42.59 35.17 42.59 23.86 42.59 11.62 42.59 –0.32 42.59 Chip size: 107 × 99 (mil)...