BD4942G-TR

Overview

The BD4942G-TR is a voltage detector IC from ROHM Semiconductor, designed for supervisory circuit applications. It features a CMOS output type and operates within a supply voltage range of 0.95 V to 10 V. The device provides a threshold voltage of 4.2 V with an accuracy of ±1%. It is housed in a 5-SSOP package (SC-74A) and supports surface mount installation. The component functions without manual reset or watchdog timer capabilities, offering low power consumption suitable for battery-operated systems.

Feature Summary

• CMOS output interface for direct logic integration
• High detection accuracy with ±1% precision
• Low static current operation for energy efficiency
• Compact SSOP-5 surface mount packaging

Applications

• Processor supervisor circuits
• Battery backup switching systems
• Portable electronic device power management
• Embedded system voltage monitoring

Procurement Notes

Verify the obsolete status and last-time-buy designation before procurement planning. Confirm availability through authorized distributors as standard stock may be limited. Ensure design-in compliance with RoHS3 specifications. Validate pinout compatibility with existing PCB layouts due to the specific SC-74A footprint requirements.

Selection Notes

Select this component when a fixed 4.2 V threshold is required for system supervision. Consider the CMOS output drive capability against load requirements. Evaluate the operating temperature range of -40°C to +105°C against environmental conditions. Compare static current consumption with alternative parts if extended battery life is critical.

Part Context

This part belongs to the BD49 series of standard voltage detectors. It serves as a dedicated monitor for single-input voltage lines. The series is characterized by high precision and low power consumption. It complements other ROHM PMIC solutions for comprehensive power management strategies in consumer and industrial electronics.

Replacement Considerations

Public confirmed substitutes include BD5242G-1TR and BD53E42G-MTR. Verify package compatibility and electrical parameter equivalence before substitution.