LS7217 - LSI

LS7217 PHOTO CONTROLLED OUTDOOR LIGHTING

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. PIN DESCRIPTION: The following describes the operation of the inputs and outputs of the IC. FIGURE 1 The Time Select Table is as follows: TS1 TS2 00 01 10 11 Time Dur.

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
  – VSS)
• LS7217 (DIP), LS7217-S (SOIC)
  – See Figure 1 PIN ASSIGNMENT APPLICATIONS Lighting control for outdoor area lighting, street lighting, parking lot lighting, billboards lighting 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. PIN DESC.