S-801 Datasheet, PDF (15/33 Pages) Seiko Instruments Inc – ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR WITH DELAY CIRCUIT (INTERNAL DELAY TIME SETTING)

ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR WITH DELAY CIRCUIT (INTERNAL DELAY TIME SETTING)
Rev.3.3_00
S-801 Series
(1) (2)
Hysterisis width (V_HYS)
A
(3) (4) (5)
V_DD
B _{Release voltage (+VDET)}
Detection voltage (−V_DET)
Minimum operating voltage
V_SS
V_DD
V_SS
Output from OUT pin
t_D
Figure 11 Operation 2
2. Delay Circuit
2-1. Delay Time
The delay circuit delays the output signal from the time at which the power voltage (V_DD)
exceeds the release voltage (+V_DET) when V_DD is turned on. The output signal is not delayed
when the V_DD goes below the detection voltage (–V_DET). (Refer to Figure 11.)
The delay time (t_D) is a fixed value that is determined by a built-in oscillation circuit and
counter.
2-2. DS Pin (ON/OFF Switch Pin for Delay Time)
The DS pin should be connected to Low or High. When the DS pin is High, the output delay
time becomes short since the output signal is taken from the middle of counter circuit (Refer to
Figure 16).
3. Other Characteristics
3-1. Temperature Characteristics of Detection Voltage
The shaded area in Figure 12 shows the temperature characteristics of the detection voltage.
–V_DET [V]
+0.792 mV/°C
2.200
–0.792 mV/°C
–40
25
85
Ta [°C]
Figure 12 Temperature Characteristics of Detection Voltage (Example for S-80122xxxx)
Seiko Instruments Inc.
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