BD4940G-TR

Overview

The BD4940G-TR is a standard voltage detector manufactured by Rohm Semiconductor, designed for monitoring single-channel power supply voltages. It operates within a reset active voltage range of 0.95 V to 10 V and features a typical under-voltage detection threshold of 4.0 V with ±1% precision. The device utilizes a CMOS output type and lacks manual reset or watchdog timer functions. It supports surface mount installation in an SSOP5 package, with a minimum packing quantity of 3000 units per tape. Operating temperatures range from -40°C to 105°C.

Feature Summary

• Provides precise voltage supervision with high accuracy for reliable system monitoring
• Features low power consumption suitable for battery-operated applications
• Offers compact surface-mount packaging for efficient board space utilization

Applications

• Monitoring main power rails in portable electronic devices
• Supervising voltage levels in industrial control systems
• Ensuring stable operation in consumer electronics equipment

Procurement Notes

Verify the specific ordering suffix and package variant against the official Rohm datasheet to ensure compatibility with design requirements. Confirm that the component status aligns with current production guidelines, as availability may vary based on manufacturing updates. Cross-reference the pinout configuration with schematic designs to prevent integration errors during assembly processes.

Selection Notes

Evaluate the required detection threshold and reset active state to match system voltage profiles accurately. Consider the operating temperature range and package dimensions for thermal management and layout constraints. Assess the output drive capability and interface compatibility with downstream logic circuits to ensure proper signal transmission without additional buffering components.

Part Context

This component belongs to the BD49 series of standard voltage detectors, which are widely used for power supply supervision in various electronic applications. The series offers multiple threshold options and package types to accommodate different design needs. The BD4940G-TR specifically targets applications requiring a 4V detection threshold with CMOS output characteristics.

Replacement Considerations

BD5240G-1TR is listed as a similar level replacement with the same package type.