|
HT2040A Datasheet, PDF (1/9 Pages) Holtek Semiconductor Inc – Christmas Light Controller | |||
|
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 applica-
tions
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 ap-
propriate 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-pro-
grammed 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
1
26th Mar â97
|
▷ |