S-809XXC Datasheet, PDF (23/36 Pages) Seiko Instruments Inc – ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR WITH DELAY CIRCUIT (EXTERNAL DELAY TIME SETTING)

ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR WITH DELAY CIRCUIT (EXTERNAL DELAY TIME SETTING)
Rev.3.3_00
S-809xxC Series
V_IH^*1
Input voltage
V_IL^*2
Ouput voltage
1 μs
t_D
V_DD×90 %
V_SS
*1. V_IH=10V
*2. V_IL=0.7V
Figure 25 Measuring Conditions of Delay Time
VDD
R
V_DD
S-809 _OUT
100 kΩ
V
S eries
CD
VSS
V
C_D
Figure 26 Measurement Circuit for Delay Time
Caution The above connection diagram and constant will not guarantees successful operation.
Perform through evaluation using the actual application to set the constant.
„ 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 27 to 28 can be easily constructed with the help of the S-809xxC Series
that has a low operating voltage, a high-precision detection voltage, hysteresis and the reset circuits.
VDD1
VDD2
VDD
S-809xxCL
Microcomputer
VSS
S-809xxCN
Microcomputer
VSS
Only for Nch open-drain products.
Figure 27 Example for Reset Circuits(S-809xxCL)
Figure 28 Example for Reset Circuits(S-809xxCN)
Caution The above connection diagram and constant will not guarantees successful operation.
Perform through evaluation using the actual application to set the constant.
Seiko Instruments Inc.
23