LS7217 Description
The 7217 is a programmable Timer IC designed to turn on a relay at night and turn off the relay at dawn or after a selectable number of hours. Figure 2 shows a typical application schematic. The following describes the operation of the inputs and outputs of the IC.
LS7217 Key Features
- Input interface to a LDR or a photo transistor
- Programmable Duration Selection
- Shunt regulator
- 50Hz / 60Hz time base selection
- Relay Driver output
- 6.0V ± 0.75V operating voltage range (VDD
- LS7217 (DIP), LS7217-S (SOIC)
- See Figure 1