For Automotive 125°C Operation Low Current Consumption Watchdog Timer with Reset Function S-19400/19401 Series

Available Applications
Automotive ICs are categorized according to their application. The following symbols indicate the types of applications for which an IC can be used.
Safety critical components typified by engine, transmission, suspension and ABS, and EV/HEV/PHEV related equipment, etc.Meter, body, headlamp, ITS, etc.Accessory, car navigation, car audio system, etc.

The S-19400/19401 Series is a watchdog timer developed using CMOS technology, which can operate with low current consumption of 3.8 μA typ. The reset function and the low voltage detection function are available.

Caution: This product can be used in vehicle equipment and in-vehicle equipment. Before using the product in the purpose, contact to SII is indispensable.


Detection voltage
2.0 V to 5.0 V, selectable in 0.1 V step
Detection voltage accuracy
Input voltage
Vdd  = 0.9 V to 6.0 V
Hysteresis width
5% typ.
Current consumption
3.8 μA typ. 
Reset time-out period
14.5 ms typ. (Cpor = 2200 pF)
Watchdog operation is switchable
Enable, Disable
Watchdog operation voltage range
2.5 V to 6.0 V
Watchdog mode switching function*1
Time-out mode, window mode
Watchdog input edge is selectable
Rising edge, falling edge, both rising and falling edges
 Product type is selectable
S-19400 Series
(Product with W / T pin (Output: WDO pin))
S-19401 Series
(Product without W / T pin (Output: RST pin, WDO pin))
Operation temperature range
Ta = −40°C to +125°C
Lead-free (Sn 100%), halogen-free
AEC-Q100 qualified*2
TMSOP-8 package product

*1. The S-19401 Series is fixed to the window mode.
*2. HSNT-8(2030) package product is in the process of AEC-Q100. Contact our sales office for details.


  • For automotive use (engine, transmission, suspension, ABS, related-devices for EV / HEV / PHEV, etc.)