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S-19501AY3A-E8T1U4 Datasheet(PDF) 11 Page - Seiko Instruments Inc |
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S-19501AY3A-E8T1U4 Datasheet(HTML) 11 Page - Seiko Instruments Inc |
11 / 52 page FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION Rev.1.2_01 S-19500/19501 Series 11 3. Watchdog timer block 3. 1 S-19500 Series (Product with watchdog enable function) Table 12 (VIN = 13.5 V, Tj = −40°C to +150°C unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Test Circuit Watchdog activation threshold current IO,WDact WADJ pin is open 1.1 1.5 1.9 mA 7 Watchdog deactivation threshold current IO,WDdeact WADJ pin is open − 1.3 − mA 7 Watchdog activation hysteresis current IO,WDhys WADJ pin is open 0.1 0.2 − mA 7 Watchdog activation threshold voltage VWADJ,th − 1.28 1.35 1.45 V 8 WADJ pin current ratio IOUT IWADJ VWADJ = 0 V, IOUT = 10 mA − 750 − − 8 WADJ pin internal resistance RWADJ,int − 490 650 845 k Ω − Charge curernt ID,cha VDLY = 1.0 V 2 5 8 μA 9 Discharge current ID,dcha VDLY = 1.0 V 0.6 1.3 2.0 μA 9 Upper timing threshold voltage VDU − 1.5 1.9 2.3 V 9 Lower watchdog timing threshold voltage VDWL − 0.5 0.7 0.9 V 9 Watchdog output pulse period tWD,p CDLY = 47 nF 38 54 72 ms 7 Watchdog output "L" time tWD,l VOUT > −VDET, CDLY = 47 nF Watchdog timer is activated 6 11 16 ms 7 Watchdog trigger time tWI,tr CDLY = 47 nF 32 43 56 ms 7 WEN pin input voltage "H" VSH − 2 − − V 10 WEN pin input voltage "L" VSL − −− 0.8 V 10 WEN pin input current "H" ISH VWEN = VOUT(S) −− 1 μA 10 WEN pin input current "L" ISL VWEN = 0 V −− 0.1 μA 10 tWI,tr t VDLY VDU VDWL tWD,l t VWO / RO tWD,p Figure 5 |
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