The R8357 Series are CMOS-based system power ICs with a voltage detector (VD) and watchdog timer (WDT) integrated in a single chip.
R8357 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. The R8357 is equipped with the function that inhibits clock monitoring of the WDT (INH) and manual reset (MR) that also stops the VD.
|Operating Voltage Range (Maximum Rating)||0.9 V to 6.0 V (7.0 V)|
|Operating Temperature Range||−40°C to 125°C|
|Supply Current||Typ. 11 µA|
|< Voltage Detector Part >|
|Detector Threshold Range||1.5 V to 5.5 V (0.1V steps)|
|Detector Threshold Accuracy||±1.0%|
|Detector Threshold Temperature Coefficient||Typ. ±100 ppm/°C (−40°C≤Ta≤110°C)|
|Power-on Reset Delay Time Accuracy||±16%* (−40°C≤Ta≤110°C)|
|Power-on Reset Delay Time||Typ. 350 ms (CD = 0.1µF) *Adjustable by external capacitor|
|< Watchdog Timer Part >|
|Watchdog Timeout Period Accuracy||±33%* (−40°C≤Ta≤110°C)|
|Watchdog Timeout Period||Typ. 310 ms (CTW = 0.1µF) *Adjustable by external capacitor|
|Reset Timer||Typ. 34 ms (CTW = 0.1µF) *Adjustable by external capacitor|
* Accuracy to center value of (Min.+Max.)/2
Ricoh is committed to providing a semiconductor device with the highest level of quality and reliability by restricting the device manufacturing only within Ricoh and the cooperative companies successfully passed our stringent inspections for automotive products. Ricoh established a traceability system and manages manufacturing information and logistics information from the warehouse.
Quality Ranks for Applications
Ricoh offers three different quality ranks for automotive products according to their application purposes.
R8357 Series offer products in Rank 1.
Rank 1: Safety-Critical Automotive Parts (Operation Control System)
AEC-Q100 Grade 1 Compliant
PRODUCT LONGEVITY PROGRAM
R8357 series operate PRODUCT LONGEVITY PROGRAM (ten-year supply is maintained as of January, 2016).
This program has been introduced to help customers select the most appropriate part for applications that require long life cycles.
Operating Temperature Range : -40°C to 125°C
The R8357 series are rated at high temperature of Tjmax = 150°C. The power dissipation is also rated at high temperature.
The detector threshold, the output type and the taping type for the ICs can be selected at the users’ request.
|Product Name||Package||Quantity per Reel|