Automotive ICs

Automotive Watchdog Timers

For general use  |  For automotive

Product Lineup View All Products/Datasheets

An automotive watchdog timer (WDT) is a timer that monitors automotive microcontroller (MCU) programs to see if they are out of control or have stopped operating. It constantly watches over the MCU to ensure it is operating normally.
ABLIC's automotive watchdog timers (WDTs) offer selectable time-out and window modes and come equipped with a reset function. Our lineup also includes 3-in-1 chips that integrate an LDO regulator, a reset function, and a WDT, with options for different output currents. Additional features include a WADJ pin for autonomously enabling/disabling the WDT based on load current, an ON/OFF circuit, a low current consumption of 5.0 μA typ. during WDT operation, and high withstand 36V operation with a 45V rating.
Moreover, our automotive WDTs are AEC-Q100 qualified and PPAP (Production Part Approval Process) capable. This ensures high quality and reliability, making them suitable for safety critical components such as BMS and EPS motors. We also support customers' automotive application designs through thermal simulation service and the provision of FIT rate.

Top Picks

S-19514

125°C, 36V, 250mA, WADJ pin, low current consumption

S-19500/1

125°C, 36V, 200mA, WADJ pin

S-19519

125°C, 36V, 500mA, WADJ pin, ON/OFF circuit

S-19400/1

125°C, mode switching available (window/time-out), separated reset output

Featured Applications

Telematics Control Units

Offers compact WDTs with low current consumption of 3.8µA, built-in reset function, and others.

EPS Motors

Offers WDTs with low current consumption of 3.0 μA, built-in reset and LDO regulator functions, and others.

Headlamps & Rear Lamps

Offers WDTs with low current consumption of 3.0 μA, built-in reset and LDO regulator functions, and others.

DC/DC Converters

Offers WDTs with low current consumption of 3.0 μA, built-in reset and LDO regulator functions, and others.

Related Content

What is a watchdog timer (WDT)?

What is Functional Safety?

Introduction of Automotive Power Management ICs

Product Lineup

Series Name Datasheet Application Note Product Category Buy Online Parts List Features Type [WDT] Watchdog mode [WDT] Watchdog enable [VD] Detection voltage min. [V] [VD] Detection voltage max. [V] [VD] Detection voltage step [V] [VD] Detection voltage accuracy ±[%] All temp. [LDO] VOUT min. [V] [LDO] VOUT max. [V] [LDO] Output current [mA] [Overall] Input voltage min. [V] [Overall] Input voltage max. [V] [Overall] Absolute maximum rating [V] [Overall] Tj max. [℃] [Overall] Current consumption typ. [μA] Operation temp. min. [°C] Operation temp. max. [°C] Package
Series name
S-19400/19401 Automotive Watchdog Timers chip1stop CoreStaFF Digi-Key MOUSER Mode switching available, Separated reset output WDT+VD* Window/Time-out switchable,
Window mode		 Yes 2.0 5.0 0.1 2.0 - - - 0.9 6.0 7.0 - 3.8 -40 125 TMSOP-8, HSNT-8(2030)
S-19405 Automotive Watchdog Timers chip1stop CoreStaFF Digi-Key MOUSER Separated reset output WDT+VD* Time-out mode Yes 2.0 5.0 0.1 2.0 - - - 0.9 6.0 7.0 - 3.8 -40 125 TMSOP-8, HSNT-8(2030)
S-19500/19501 Automotive Watchdog Timers chip1stop CoreStaFF Digi-Key MOUSER WADJ pin WDT+VD+LDO* Time-out mode Selectable 2.6 5.0 0.1 2.0 3.0 5.3 200 4.0 36.0 45.0 150 60.0 -40 125 HSOP-8A
S-19502/19503 Automotive Watchdog Timers chip1stop CoreStaFF Digi-Key MOUSER WADJ pin WDT+VD+LDO* Time-out mode Selectable 2.6 5.0 0.1 2.0 3.0 5.3 400 4.0 36.0 45.0 150 60.0 -40 125 HSOP-8A, TO-252-9S
S-19504/19505 Automotive Watchdog Timers chip1stop CoreStaFF Digi-Key MOUSER WADJ pin, Low current consumption WDT+VD+LDO* Time-out mode Selectable 2.6 4.7 0.1 2.0 3.3 5.0 250 3.0 36.0 45.0 150 3.0 -40 125 HSOP-8A, TO-252-9S
S-19506/19507 Automotive Watchdog Timers WADJ pin, Low current consumption WDT+VD+LDO* Time-out mode Selectable 2.6 4.7 0.1 2.0 3.3 5.0 500 3.0 36.0 45.0 150 3.0 -40 125 HSOP-8A, TO-252-9S
S-19509 Automotive Watchdog Timers WADJ pin, ON / OFF circuit WDT+VD+LDO* Time-out mode Yes 2.6 4.7 0.1 2.0 3.3 5.0 500 3.0 36.0 45.0 150 3.2 -40 125 HSOP-8A, TO-252-9S, HTSSOP-16
S-19514/19515 Automotive Watchdog Timers chip1stop CoreStaFF Digi-Key MOUSER WADJ pin, Low current consumption WDT+VD+LDO* Window mode Selectable 2.6 4.7 0.1 2.0 3.3 5.0 250 3.0 36.0 45.0 150 3.0 -40 125 HSOP-8A, TO-252-9S
S-19516/19517 Automotive Watchdog Timers WADJ pin, Low current consumption WDT+VD+LDO* Window mode Selectable 2.6 4.7 0.1 2.0 3.3 5.0 500 3.0 36.0 45.0 150 3.0 -40 125 HSOP-8A, TO-252-9S
S-19518 Automotive Watchdog Timers chip1stop CoreStaFF Digi-Key MOUSER ON / OFF circuit WDT+VD+LDO* Window mode Yes 2.6 4.7 0.1 2.0 3.3 5.0 250 3.0 36.0 45.0 150 3.2 -40 125 HSOP-8A, TO-252-9S
S-19519 Automotive Watchdog Timers chip1stop CoreStaFF Digi-Key MOUSER WADJ pin, ON / OFF circuit WDT+VD+LDO* Window mode Yes 2.6 4.7 0.1 2.0 3.3 5.0 500 3.0 36.0 45.0 150 3.2 -40 125 HSOP-8A, TO-252-9S, HTSSOP-16

*WDT: Watchdog timer *VD: Voltage detector (Reset IC) *LDO: Low-dropout regulator