S-801 Datasheet, PDF (25/33 Pages) Seiko Instruments Inc – ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR WITH DELAY CIRCUIT (INTERNAL DELAY TIME SETTING)

ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR WITH DELAY CIRCUIT (INTERNAL DELAY TIME SETTING)
Rev.3.3_00
S-801 Series
„ Application Circuit Examples
Microcomputer Reset Circuits
If the power supply voltage to a microcomputer falls below the specified level, an unspecified
operation may be performed or the contents of the memory register may be lost. When power supply
voltage returns to normal, the microcomputer needs to be initialized before normal operations can be
done. Reset circuits protect microcomputers in the event of current being momentarily switched off
or lowered.
Reset circuits shown in Figures 22 to 23 can be easily constructed with the help of the S-801 series
that has low operating voltage, a high-precision detection voltage, hysteresis, and a built-in delay
circuit.
VDD
VDD1
VDD2
S-
801xxAL
Microcomputer
S-
801xxAN
Microcomputer
VSS
VSS
(Nch open-drain output products only.)
Figure 22 Ret Circuit (S-801xxAL)
Figure 23 Reset Circuit (S-801xxAN)
Caution The above connection diagram will not guarantees successful operation. Perform
through using the actual application to set the constant.
Seiko Instruments Inc.
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