BD4842G-TR

Overview

The BD4842G-TR is a standard CMOS voltage detector IC manufactured by ROHM Semiconductor. It features a single input channel with an open-drain output type and a reset active state of low. The typical under-voltage detection threshold is set at 4.2V, with a precision of ±1%. The device operates within a supply voltage range from 0.95V to 10V and consumes a circuit current of 0.60μA at Vs=4.8V in the ON state. It lacks manual reset, watchdog timer, and battery backup switch functions. The component is housed in an SSOP-5 package and supports an operating temperature range from -40°C to +105°C.

Feature Summary

• Standard CMOS voltage detection architecture for monitoring power supply levels
• Open-drain output configuration providing flexible interface compatibility
• Low power consumption design suitable for battery-operated applications
• Compact SSOP-5 surface mount packaging for space-constrained designs

Applications

• Portable electronic devices requiring reliable power supervision
• Embedded systems needing simple undervoltage protection
• Consumer electronics utilizing CMOS logic families
• Industrial control circuits with moderate temperature requirements

Procurement Notes

Verify the specific suffix G-TR against official ROHM documentation to confirm tape-and-reel packaging and pinout configuration. Ensure the procurement source provides valid RoHS compliance certificates and original manufacturer traceability. Cross-reference the part number with the latest datasheet revision to confirm availability status, as this component may be subject to end-of-life notices or replacement recommendations.

Selection Notes

Select this component when a fixed 4.2V threshold is required without adjustable delay or manual reset capabilities. Consider the open-drain output requirement for pull-up resistor integration in the target circuit design. Evaluate the ±1% precision accuracy against system tolerance requirements. Confirm that the SSOP-5 package dimensions fit the PCB layout constraints and thermal management needs of the application environment.

Part Context

This voltage detector belongs to the BD48 series of standard CMOS supervisors designed for general-purpose power monitoring. It serves as a foundational component for ensuring system stability during power-up and shutdown sequences. The series typically offers various threshold voltages to accommodate different logic family requirements. This specific model represents a cost-effective solution for basic undervoltage detection tasks in non-critical applications.

Replacement Considerations

BD5242G-1TR is a recommended replacement with similar package and function.