S-19500A03A-E8T1U4 Datasheet, PDF (24/52 Pages) Seiko Instruments Inc – CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION
S-19500/19501 Series
Rev.1.2_01
2. 5 Reset reaction time (trr)
The reset reaction time is the time period from when VOUT falls below the detection voltage (−VDET) to when the RO
pin output inverts (Refer to Figure 37). Since trr depends on the reaction time of internal circuit and the discharge
time of CDLY, it becomes longer if the capacitance of CDLY becomes larger. Refer to "2. 9 Reset reaction time vs.
Capacitance for delay time adjustment capacitor" in " Characteristics (Typical Data)".
V
−VDET
VOUT
VDRL
VDLY
VRO
trr
Figure 37 Reset Reaction Time
Caution Values shown in "2. Detector block" in " Electrical Characteristics" are values when watchdog timer
stops. trr may shorten since the discharge operation of CDLY may be performed while the watchdog timer
operates.
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