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R5108 Series
Watchdog Timer Equipped with SENSE Pin with VD
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) |
Technical Documents
Typical Application
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 |
|---|---|---|---|---|
| R5108Gxx1x-TR-FE |
|
SSOP-8G | R5108G | R5108G-FE |
| R5108Gxx1x-TR-YE |
|
SSOP-8G | R5108G | R5108G-YE |
| R5108Gxx1x-TR-JE |
|
SSOP-8G | R5108G | R5108G-JE |
| R5108Gxx1x-TR-AE |
|
SSOP-8G | R5108G | R5108G-AE |
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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Please contact us or our distributors for unpublished reliability information.
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