s-1009c15s Seiko Instruments Inc., s-1009c15s Datasheet - Page 13

• Manufacturer Part Number: s-1009c15s
• Description: Super-low Current Consumption Super High-accuracy Voltage Detector With Delay Circuit External Delay Time Setting
• Manufacturer: Seiko Instruments Inc.

Rev.4.0
SUPER-LOW CURRENT CONSUMPTION SUPER HIGH-ACCURACY VOLTAGE DETECTOR WITH DELAY CIRCUIT (EXTERNAL DELAY TIME SETTING)
2. Delay Circuit
The delay circuit delays the output signal from the time at which the power voltage (V
voltage (+V
voltage (−V
The delay time (t
attached external capacitor (C
Caution 1.
t
D
_00
[ms] = Delay coefficient × C
2.
3.
DET
DET
Delay coefficient (+85°C):
Delay coefficient (+25°C):
Delay coefficient (−40°C):
When the CD pin is open, a double pulse shown in Figure 15 may appear at release.
To avoid the double pulse, attach 100 pF or larger capacitor to the CD pin. Do not apply
voltage to the CD pin from the exterior.
Print circuit board layout should be made in such a way that no current flows into or flows
from the CD pin since the impedance of the CD pin is high, otherwise correct delay time
cannot be provided.
There is no limit for the capacitance of the external capacitor (C
current of the capacitor can be ignored against the built-in constant current value. Leakage
current causes deviation in delay time. When the leakage current is larger than the built-in
constant current, no release takes place.
) or less (Refer to Figure 14).
) when V
D
) is determined by the time constant of the built-in constant current (approx. 100 nA) and the
DD
is turned on. The output signal is not delayed when V
D
), and calculated from the following equation.
D
[nF]
V
Min. 2.82,
Min. 4.70,
Min. 5.64,
OUT
Seiko Instruments Inc.
Figure 15
Typ. 4.20,
Typ. 5.53,
Typ. 8.40,
Time
Max. 5.72
Max. 6.36
Max. 12.08
DD
D
decreases to the detection
) as long as the leakage
DD
) exceeds the release
S-1009 Series
13