RS803-4.00YSF3

Overview

The RS803-4.00YSF3 is a voltage supervisor manufactured by Runic Technology, designed to monitor power supply integrity in electronic circuits. It features an open-drain output type and operates with a reset active low level. The device supports a working voltage range of 4.84V to 5.5V and includes a threshold voltage (Vth) of 4.00V. It is housed in a TO-236-3, SC-59, or SOT-23-3 package and functions within a temperature range of -40°C to 125°C (TA).

Feature Summary

• Provides continuous monitoring of supply voltage levels to ensure system stability.
• Generates a reset signal when the input voltage falls below the specified threshold.
• Features an open-drain output configuration for flexible interfacing with digital logic.

Applications

• Microcontroller power supply supervision
• Embedded system reset generation
• Battery-powered device voltage monitoring

Procurement Notes

Verify the specific suffix YSF3 corresponds to the required tape-and-reel packaging format if automated assembly is planned. Confirm RoHS3 compliance status matches current environmental regulations for your target market. Ensure the MSL rating of 3 aligns with your facility's moisture sensitivity handling procedures during storage and soldering processes.

Selection Notes

Select this component when a precise 4.00V threshold is required for systems operating between 4.84V and 5.5V. The SOT-23-3 package offers space efficiency for compact designs. Consider the open-drain output capability if level shifting or wired-OR configurations are necessary within the circuit architecture.

Part Context

This part belongs to the RS803 series of supervisors from Runic Technology, which typically includes various threshold voltages. The series is characterized by CMOS technology for low power consumption. Other variants in the family may offer different trip points or output types, but this specific model is defined by its 4.00V threshold and single-channel design.

Replacement Considerations

Direct substitutes must match the 4.00V threshold, SOT-23-3 package, and open-drain output. Verify pinout compatibility before substitution. Generic voltage monitors with similar thresholds may require circuit adjustments due to differences in reset delay times or quiescent current specifications.