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.

FIT rate calculation
ABLIC Inc. offers FIT rate calculated based on actual customer usage conditions in order to support customer functional safety design.
For more information regarding our FIT rate calculation, contact our sales representatives.

Caution: This product can be used in vehicle equipment and in-vehicle equipment. Before using the product for these purposes, it is imperative to contact our sales representatives.


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 during watchdog timer operation
3.8 μA typ. 
Reset time-out period
14.5 ms typ. (Cpor = 2200 pF)
Watchdog time-out period
24.6 ms typ. (CWDT = 470 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

*1. The S-19401 Series is fixed to the window mode.
*2. Contact our sales representatives for details.


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

Parts List

  • These descriptions may be different from the actual product name and parameter.
    Please confirm the product name and specifications with the data sheet again.
  • The information herein is subject to change without notice.