S-19104N10H-M5T1U Datasheet, PDF (34/40 Pages) Seiko Instruments Inc – VOLTAGE DETECTOR WITH SENSE PIN

FOR AUTOMOTIVE 105°C OPERATION BUILT-IN DELAY CIRCUIT (EXTERNAL DELAY TIME SETTING) VOLTAGE DETECTOR WITH SENSE PIN
S-19104/19106 Series
Rev.1.2_00
 Application Circuit Examples
1. Microcomputer reset circuits
In microcomputers, when the power supply voltage is lower than the minimum operation voltage, an unspecified
operation may be performed or the contents of the memory register may be lost. When power supply voltage
returns to the normal level, the microcomputer needs to be initialized. Otherwise, the microcomputer may
malfunction after that. Reset circuits to protect microcomputer in the event of current being momentarily switched
off or lowered.
Using the S-19104/19106 Series which has the low minimum operation voltage, the high-accuracy detection
voltage and the hysteresis width, reset circuits can be easily constructed as seen in Figure 36 and Figure 37.
V_DD
V_DD1
V_DD
V_DD1
VDD
SENSE
OUT
VSS CD
Microcomputer
VDD
SENSE
OUT
VSS CD
Microcomputer
GND
Figure 36 Example of Reset Circuit
(Nch open-drain output product)
GND
Figure 37 Example of Reset Circuit
(CMOS output product)
Caution The above connection diagram and constant will not guarantee successful operation.
Perform thorough evaluation using the actual application to set the constant.
34