S80728 Seiko Instruments, Inc., S80728 Datasheet - Page 39

• Manufacturer Part Number: S80728
• Description: (S807 Series) High Precision Voltage Detector
• Manufacturer: Seiko Instruments, Inc.

HIGH-PRECISION VOLTAGE DETECTOR
S-807 Series
38
2. Power-on reset circuit
The Nch open-drain output products of the S-807 Series can be used to construct a power-on reset circuit. Following is an
example
Note 3: When there is a sharp rise in power, the output voltage may go “H” momentarily in unstable range of
Note 1: R should be 7.5k
Note 2: “Di” momentarily discharges the charge received via “C” at the falling edge of power off. There
.
the output voltage (the output voltage is unstable below the minimum operating voltage) .
is no need to insert a diode, when there is no conflict with application circuit even if there is a
delay in the falling edge of OUT at the falling edge of power off.
V
V
(V)
(V)
DD
DD
(R 7.5k )
or less for purpose of protection against oscillation.
V
V
DD
SS
C
R
Seiko Instruments Inc.
V
+
IN
-
Di
t (s)
t (s)
S-807XX
AN/SN
Figure 27
Figure 28
(Nch open-drain products)
OUT
OUT
(V)
(V)
OUT
t (s)
t (s)