S-801 Seiko Instruments, S-801 Datasheet - Page 25

• Manufacturer Part Number: S-801
• Description: ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
• Manufacturer: Seiko Instruments

Rev.3.3
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Application Circuit Examples
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR WITH DELAY CIRCUIT (INTERNAL DELAY TIME SETTING)
Microcomputer Reset Circuits
Caution The above connection diagram will not guarantees successful operation. Perform
S-
801xxAL
_00
Figure 22 Ret Circuit (S-801xxAL)
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.
through using the actual application to set the constant.
Microcomputer
Seiko Instruments Inc.
VDD
VSS
VDD1
(Nch open-drain output products only.)
Figure 23 Reset Circuit (S-801xxAN)
S-
801xxAN
Microcomputer
S-801 Series
VDD2
VSS
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