Seiko Instruments Inc S-8081B
The S-8081B is a CMOS CR timer developed for appliances and industrial equipment use. It consists of a CR oscillator, a 20-stage divider, a power-on clear circuit, a trigger input chattering rejection circuit, an internal voltage regulator, a level shift circuit, and an output driver. It can be used as a high-precision, long-time monostable timer.FEATURES
● Wide power supply operating range : 4.5 to 16.5 V● Low current consumption : 200 µA max.(C = 200 kΩ, R = 0.0047 µF, open output )
● Time can be set by external CR
● Excellent oscillation stability because of built-in voltage regulator
● Power-on clear circuit is integrated
● Both trigger I/O inverting operation and set/reset operation can be performed n
APPLICATIONS
● Time switch● Long time delay generator n Pin Assignment 8-pin DIP/SOP Top view VSS 1 SET 2 OUT 3 RESET 4 S−8081B 8 VDD 7 CR 6 DISCHARGE 5 TRIGGER n Block Diagram Figure 1 CR 7 DIS- 6