BD4851G-TR

Overview

The BD4851G-TR is a standard CMOS voltage detector IC manufactured by ROHM Semiconductor. It features an N-channel open-drain output and monitors a single input with a typical under-voltage detection threshold of 5.1V. The device offers high accuracy with a precision of ±1% and includes a reset delay timer. It operates within a supply voltage range of 0.95V to 10V, with a maximum operating voltage of 10V. The circuit consumes 0.60μA in the active state and 0.85μA in the off state at VS=4.8V. It supports manual reset functionality and is housed in an SSOP-5 package.

Feature Summary

• High-precision voltage monitoring with ±1% detection accuracy
• Ultra-low current consumption for power efficiency
• Built-in reset delay timer eliminates external capacitor requirements
• N-channel open-drain output compatible with various logic levels

Applications

• Processor supervisor circuits requiring precise voltage monitoring
• Battery-powered devices needing low standby current
• Industrial control systems with wide operating temperature ranges

Procurement Notes

Verify the exact part number BD4851G-TR against official ROHM documentation to confirm availability status, as supply conditions may change. Ensure compatibility with existing board layouts regarding the SSOP-5 package dimensions and pinout configuration. Cross-reference thermal dissipation limits and operating temperature specifications (-40°C to +105°C) with your system's environmental requirements before finalizing procurement decisions.

Selection Notes

Select this component when a fixed 5.1V detection threshold is required with high accuracy. The built-in delay timer simplifies design by removing the need for external timing capacitors. Consider the N-channel open-drain output for flexible interfacing. Verify that the 10V maximum supply voltage meets the system's peak voltage needs. Compare static current consumption against other series members if ultra-low power is critical.

Part Context

This part belongs to the BD48xxx series of standard CMOS voltage detectors from ROHM. The series is characterized by high accuracy and low current consumption, offering various detection voltages from 2.3V to 6.0V in 0.1V increments. The BD4851G-TR specifically targets applications requiring a 5.1V threshold with integrated delay functionality, distinguishing it from non-delay variants or different output types within the broader family.

Replacement Considerations

BD5250G-1 is listed as a similar level replacement with the same SSOP-5 package. Note that the BD5250G-1 has a typical detection voltage of 5.0V compared to the BD4851G-TR's 5.1V. Verify that the slight voltage difference and any changes in reset delay characteristics are acceptable for the specific application design.