ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-808xxC Series
Rev.3.2_00
1 µs
1 µs
R*1
100 kΩ
VDD
S-808xxC
Series
VIH
VDD
OUT
COUT
Input voltagae
V
VSS
V
VIL
tpHL
tpLH
VDD
VDD×90 %
*1. R is unnecessary for CMOS output products.
Output voltage
VDD×10 %
VIH=10 V, VIL=0.95 V
Figure 23 Measurement Condition for Response Time
Figure 24 Measurement Circuit for Response Time
Caution The above connection diagram and constants do not guarantee correct operation. Perform
sufficient evaluation using the actual application to set the constants.
Application Circuit Examples
1. 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 25 to 26 can be easily constructed with the help of the S-808xxC series,
that has low operating voltage, a high-precision detection voltage and hysteresis.
VDD1
VDD2
VDD
S-
808xxCN
Microcomputer
S-
Microcomputer
808xxCL
VSS
VSS
(Only for Nch open-drain products)
Figure 25 Reset Circuit Example(S-808xxCL)
Figure 26 Reset Circuit Example (S-808xxCN)
Caution The above connection diagram and constants do not guarantee correct operation. Perform
sufficient evaluation using the actual application to set the constants.
32
Seiko Instruments Inc.
SII [ SEIKO INSTRUMENTS INC ]
