S-1000 SII [Seiko Instruments Inc], S-1000 Datasheet - Page 21

• Manufacturer Part Number: S-1000
• Description: ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
• Manufacturer: SII [Seiko Instruments Inc]

Caution The above connection diagram and constants do not guarantee correct operation. Perform sufficient
Rev.2.3
Input voltagae
Output voltage
V
1. Microcomputer reset circuits
Application Circuit Examples
DD
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 24, 25 can be easily constructed with the help of the S-1000 series, that has low
operating voltage, a high-precision detection voltage and hysteresis.
Caution The above connection diagram and constants do not guarantee correct operation. Perform sufficient
× 10%
Figure 22 Measurement condition for response time
evaluation using the actual application to set the constants.
V
V
V
DD
_00
Figure 24 Reset circuit example(S-1000C)
S-1000C
IH
IL
evaluation using the actual application to set the constants.
1 µs
V
IH
t
PHL
= 5.5 V, V
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
Microcomputer
IL
1 µs
= 0.95 V
t
PLH
Seiko Instruments Inc.
VDD
VSS
V
DD
× 90%
*1. R is unnecessary for CMOS output products.
V
DD
VDD1
Figure 23 Measurement circuit for response time
Figure 25 Reset circuit example (S-1000N)
S-1000N
(Only for Nch open-drain products)
V
S-1000
Series
VDD
VSS
Microcomputer
OUT
C
S-1000 Series
OUT
V
VDD2
VSS
R
100 kΩ
*1
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