Automotive ICs

Automotive, 125°C Operation, 36 V, Supply Voltage Divided Output, Window Voltage Detector with SENSE Pin Reverse Connection Protection S-191L/191NxxxxA Series

S-191L/N Series features. Supports the building of functional safety. Three monitoring functions in a single chip. Industry's first* supply voltage divided output!!

This IC, developed using CMOS technology, is a high-accuracy window voltage detector with the supply voltage divided output 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.
The supply voltage divided output is prepared in this IC. The supply voltage divided output is a function that divides the VSENSE into VSENSE/6, VSENSE/8, VSENSE/12 or VSENSE/14 and outputs the voltage. For example, this function makes it possible that the IC connects to a low voltage microcontroller A/D converter directly and the microcontroller monitors a battery voltage.

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.


Detector block

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)
Output form
Nch open-drain output

Supply voltage divider block

Output voltage
VPMOUT = VSENSE/6 (S-191L Series L / M / N type)
VPMOUT = VSENSE/8 (S-191L Series P / Q / R type)
VPMOUT = VSENSE/12 (S-191N Series L / M / N type)
VPMOUT = VSENSE/14 (S-191N Series P / Q / R type)
Output capacitor (CPM)
A ceramic capacitor can be used (0.1 μF to 0.22 μF).
Built-in enable circuit
Ensures long battery life.


Current consumption
During supply voltage divided output operates 1.3 μA typ.
During supply voltage divided output stops 0.9 μA typ.
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

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    Please confirm the product name and specifications with the data sheet again.
  • The information herein is subject to change without notice.