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R5105 Series

Watchdog Timer with VD

  • Automotive
  • PLP
  • AEC-Q100
  • RoHS

The R5105 Series are CMOS-based system power ICs with a voltage detector (VD) and watchdog timer (WDT) integrated in a single chip. R5105 monitors the power system of devices equipped with microprocessors and prevents system runaway with a reset signal when a malfunction occurs. The output delay time of the VD and watchdog timeout period/reset time can be adjusted high accuracy by an external capacitor.

Specs & Datasheets

Input Voltage Range 0.9 V to 6.0 V (7.0 V)
Operating Temperature Range -40°C to 125°C (150°C)
-40°C to 105°C (150°C)
Supply Current Typ. 11 µA
Timeout Period Typ. 310 ms (CTW = 0.1 µF)
Timeout Period Accuracy ±33%
Reset Time Typ. 34 ms (CTW = 0.1 µF)
Package SOT-23-6
VD Detector Threshold Range 1.5 V to 5.5 V (0.1 step)
VD Detector Threshold Accuracy ±1.0%
VD Detector Threshold Temperature Coefficient Typ. ±100 ppm/°C
VD Release Output Delay Time Typ. 370 ms (CD = 0.1 µF)
VD Release Delay Time Accuracy ±16% (−40°C ≤ Ta ≤ 105°C)
±18% (−40°C ≤ Ta ≤ 125°C)

Download Datasheet

Technical Documents

Typical Application

Typical Application

Timing Chart

Timing Chart

* VTCD : Threshold voltage of CD pin when a power-on reset pulse inverting.
* Vref2H : CTW pin voltage at the end of WDT timeout period.
* Vref2L : CTW pin voltage at the begin of WDT timeout period.
* VDDL : 0.9 V (Max.)

Quality & Packages

Product Name Compatibility Package Marking Reliability
  • gradeAutomotiveA
  • aecQ1001
  • plpP
SOT-23-6 R5105N R5105N-JE
  • gradeAutomotiveA
  • aecQ1001
  • plpP
SOT-23-6 R5105N R5105N-AE

Refer to the datasheets for the details on the product.
The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
Please contact us or our distributors for unpublished reliability information.

Sample / Buy

Functional Description

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Category:Watchdog Timers

Features +VD
min (V)
max (V)