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R5108 Series

Watchdog Timer Equipped with SENSE Pin with VD

  • Consumer
  • Industrial
  • Automotive
  • PLP
  • AEC-Q100
  • RoHS

The R5108 Series are CMOS-based system power ICs with a voltage detector (VD) and watchdog timer (WDT) integrated in a single chip.

R5108 monitors the power system of devices equipped with microprocessors and prevents system runaway with a reset signal when a malfunction occurs. R5108 is equipped with the function that inhibits clock monitoring of the WDT (INH). Since R5108 has a SENSE pin for monitoring voltage separately from the power pin, its reset signal does not become unstable under the condition that the power supply is sufficient to operate the IC, and the "L" can be maintained.

Specs & Datasheets

  Consumer Industrial Automotive
Input Voltage Range 1.5 V to 6.0 V (7.0 V)
Operating Temperature Range -40°C to 105°C (125°C) -40°C to 125°C (150°C) -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 SSOP-8G
VD Detector Threshold Range 1.5 V to 5.5 V (0.1 V 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% ±18% ±18% (−40°C ≤ Ta ≤ 125°C)
±16% (−40°C ≤ Ta ≤ 105°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.
* tPHL : Output delay time
* tWDI : tWD/10 (SCK pulses input during this period are ignored.)

Quality & Packages

Product Name Compatibility Package Marking Reliability
  • gradeConsumerC
  • plpP
SSOP-8G R5108G R5108G-FE
  • gradeIndustrialI
SSOP-8G R5108G R5108G-YE
  • gradeAutomotiveA
  • aecQ1001
  • plpP
SSOP-8G R5108G R5108G-JE
  • gradeAutomotiveA
  • aecQ1001
  • plpP
SSOP-8G R5108G R5108G-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Please contact us or our distributors for unpublished reliability information.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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