s-80857cny-z-g Seiko Instruments Inc., s-80857cny-z-g Datasheet - Page 35

• Manufacturer Part Number: s-80857cny-z-g
• Description: Super-small Package High-precision Voltage Detector
• Manufacturer: Seiko Instruments Inc.

Rev.4.3
2. Power-on Reset Circuit
A power-on reset circuit can be constructed using Nch open-drain output product of S-808××C Series.
Remark When the power rises sharply as shown in the Figure 31 left, the output may goes to the high level
_00
for an instant in the undefined region where the output voltage is undefined since the power
voltage is less than the minimum operation voltage.
V
(V)
V
(V)
DD
DD
*1. Resistor R should be 75 kΩ or less to prevent oscillation.
*2. Diode Di instantaneously discharges the charge stored in the capacitor (C) at the
SUPER-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
power falling,Di can be removed when the delay of the falling time is not important.
(R≤75 kΩ)
VDD
VSS
R
C
* 1
Seiko Instruments Inc.
t (s)
t (s)
VIN
Di
*2
Figure 29
Figure 30
Figure 31
S-
808xxCN
OUT
(V)
(Nch open-drain products)
OUT
(V)
OUT
S-808xxC Series
t (s)
t (s)
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