Automotive ICs

Automotive, 125°C Operation, 3.8 μA Current Consumption Watchdog Timer with Reset Function S-19400/19401 Series

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.)