S-1000 Datasheet, PDF (21/38 Pages) Seiko Instruments Inc – ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR

Rev.2.3_00
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series
V_IH
Input voltagae
1 µs
1 µs
V_IL
V_DD
t_PHL
t_PLH
Output voltage
V_DD × 10%
V_IH = 5.5 V, V_IL = 0.95 V
VDD
R^*1
V_DD
S-1000
OUT
100 kΩ
V Series
VSS
C_OUT
V
V_DD × 90% _{*1. R is unnecessary for CMOS output products.}
Figure 23 Measurement circuit for response time
Figure 22 Measurement condition 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 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.
VDD1
VDD2
VDD
S-1000C
Microcomputer
VSS
S-1000N
Microcomputer
VSS
Figure 24 Reset circuit example(S-1000C)
(Only for Nch open-drain products)
Figure 25 Reset circuit example (S-1000N)
Caution The above connection diagram and constants do not guarantee correct operation. Perform sufficient
evaluation using the actual application to set the constants.
Seiko Instruments Inc.
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