R5108G SeriesAEC-Q100 Compliant

Microprocessor Supervisory Circuit with SENSE pin for Automotive Applications


Data Sheet
Data Sheet

The R5108G is a microprocessor supervisory circuit and has high accuracy and ultra low supply current voltage detector with built-in delay circuit and watchdog timer. When the SENSE voltage is down across the threshold, or the watchdog timer does not detect the system clock from the microprocessor, the reset output is generated.
The voltage detector circuit is used for the system reset, etc. The detector threshold is fixed internally, and the accuracy is ±1.0%. The released delay time (Power-on Reset Delay) circuit is built-in, and output delay time is adjustable with an external capacitor, and the accuracy is ±16%*. When the SENSE voltage becomes the released voltage, the reset state will be maintained during the delay time. The output type of the reset is selectable, Nch open-drain, or CMOS.
The time out period of the watchdog timer can be also set with an external capacitor, and the accuracy is ±33%*.
There is a function to stop supervising clock by the watchdog timer (INH function). A necessary voltage source can be supervised with SENSE pin. There are another 4 products by the difference of packages and the function of voltage detector and watchdog timer. The package of R5108G is SSOP-8G. The package of R5108G is SSOP-8G.

  • *Accuracy to center value of (Min.+Max.)/2


Operating Voltage Range (Maximum Rating) 1.5V to 6.0V (7.0V)
Supply Current Typ. 11µA
< Voltage Detector Part > Detector Threshold Range 1.5V to 5.5V (0.1V steps)
Detector Threshold Accuracy ±1.0%
Detector Threshold Temperature Coefficient Typ. ±100ppm /°C (-40°C ≤ Ta ≤ 105°C)
Power-on Reset Delay Time accuracy ±16%* (-40°C ≤ Ta ≤ 105°C)
Power-on reset delay time of the voltage detector Typ. 370ms with an external capacitor : 0.1µF
With SENSE pin Able to keep "L" reset signal
< Watchdog Timer Part > Built-in a watchdog timer's time out period accuracy ±33%* (-40°C ≤ Ta ≤ 105°C)
Timeout period for watchdog timer Typ. 310ms with an external capacitor : 0.1µF
Reset timer for watchdog timer Typ. 34ms with an external capacitor : 0.1µF
With Inhibit pin (INH) Able to stop watchdog timer
Operating Temperature Range -40 to +105°C
  • *Accuracy to center value of (Min.+Max.)/2


  • Supervisory circuit for car accessories including car audio systems, car navigation systems, and ETC systems.

Documents Download

Data Sheet Package Quality Assurance Data Suffix Composition & Content*1
R5108G Series SSOP-8G Contact us*1 -JE Sn (Sn: 100%)
  • *1The composition of the product cannot be specified.
  • *2The reliability information is not listed for devices above rank2. Please contact Ricoh sales representatives for further informations.

  • Buy Products / Order Sample


Ricoh semiconductor products are available at those dealers.

Page Top