Nisshinbo Micro Devices Inc. Supervisors R5109G421A-TR-FE

The R5109G421A-TR-FE from Quarktwin Technology Ltd. is a microprocessor supervisory circuit designed for high accuracy and low supply current applications. It operates within a voltage range of 0.9V to 6.0V and features a typical supply current of 11.5µA. The device includes a built-in delay circuit and watchdog timer, which generates a reset output when the supply voltage falls below a predetermined threshold or when the system clock is not detected. The voltage detector has a threshold range of 1.5V to 5.5V with an accuracy of ±1.0%. The power-on reset delay time can be adjusted using an external capacitor, with a typical delay of 370ms. The watchdog timer timeout period is also adjustable, with a typical timeout of 310ms and an accuracy of ±33%. The R5109G421A-TR-FE supports dual clock inputs, allowing it to supervise two microprocessors simultaneously. It is packaged in an SSOP-8G format, making it suitable for compact designs.