Automotive ICs

Automotive, 125°C Operation, 36 V, Window Voltage Detector with SENSE Pin Reverse Connection Protection S-191ExxxxA Series

This IC, developed using CMOS technology, is a high-accuracy window voltage detector that detects undervoltage and overvoltage. The detection voltage and release voltage are fixed internally with an accuracy of ±1.5%.
Apart from the power supply pin, the detection voltage input pin (SENSE pin) is also prepared, so the output is stable even if the SENSE pin voltage (VSENSE) falls to 0 V. The SENSE pin also has a built-in reverse connection protection circuit that reduces current in the SENSE pin during a reverse connection.
The release signal can be delayed by setting a capacitor externally, and the release delay time accuracy is ±15% (CD = 3.3 nF). The output form is Nch open-drain output.

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
Undervoltage detection voltage 4.0 V to 10.0 V (0.05 V step)
Overvoltage detection voltage 16.0 V to 18.0 V (0.1 V step)
Detection voltage accuracy
Undervoltage detection voltage ±1.5%
Overvoltage detection voltage ±1.5%
Hysteresis width selectable from "Available" / "Unavailable"
"Available": 5.0%, 10.0%
"Unavailable": 0%
Release delay time accuracy
±15% (CD = 3.3 nF)
Current consumption
0.9 μA typ.
Output form
Nch open-drain output
Built-in reverse connection protection circuit
Reduces current in the SENSE pin during a reverse connection.
Operation voltage range
3.0 V to 36.0 V
Operation temperature range
Ta = −40°C to +125°C
Lead-free (Sn 100%), halogen-free
Withstand 45 V load dump
AEC-Q100 qualified*1

*1. Contact our sales representatives for details.


  • Overvoltage detection of power supply for automotive electric component
  • Automotive battery voltage detection
  • For automotive use (engine, transmission, suspension, ABS, related-devices for EV / HEV / PHEV, etc.)

Parts List

  • U(Ux), S and G at the end of the product name of ABLIC Inc. were used to indicate different material specifications as “environmental code”,
    however, these have now been unified into “lead-free and halogen-free” and are identical in terms of environmental quality.
  • Note: Lead-free plating other than 100% Sn is applied to some limited old products, therefore, please contact our sales representatives for details.
  • 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.