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R5109 Series

Watchdog Timer Equipped with 2-Clock Monitoring with VD

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

The R5109 Series are CMOS-based system power ICs with a voltage detector (VD) and watchdog timer (WDT) integrated in a single chip.

R5109 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 by an external capacitor with a high degree of accuracy. R5109 is equipped with the function that inhibits clock monitoring of the WDT (INH) and the function to supervise two different clocks.

Specs & Datasheets

  Consumer Industrial Automotive
Input Voltage Range 0.9 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. 11.5 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.
* VDDL : 0.9 V (Max.)

Quality & Packages

Product Name Compatibility Package Marking Reliability
R5109Gxx1x-TR-FE
  • gradeConsumerC
  • plpP
SSOP-8G R5109G R5109G-FE
R5109Gxx1x-TR-YE
  • gradeIndustrialI
SSOP-8G R5109G R5109G-YE
R5109Gxx1x-TR-JE
  • gradeAutomotiveA
  • aecQ1001
  • plpP
SSOP-8G R5109G R5109G-JE
R5109Gxx1x-TR-AE
  • gradeAutomotiveA
  • aecQ1001
  • plpP
SSOP-8G R5109G R5109G-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Please contact us or our distributors for unpublished reliability information.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,2 Clock Input
VIN
min (V)
0.9
VIN
max (V)
6.0
ISS
(µA)
11.5