BD45291G-TR

Overview

The BD45291G-TR is a voltage detector supervisory circuit manufactured by ROHM Semiconductor. It features a fixed threshold detection voltage of 2.9 V with a precision of ±1%. The device provides an open-drain output and includes a manual reset function. It operates within a supply voltage range up to 10 V and maintains accuracy across a temperature range of -40°C to +105°C. The circuit consumes low current, specified at 0.80 μA during operation and 0.85 μA in standby. It utilizes a compact SSOP-5 surface-mount package.

Feature Summary

• Built-in counter timer delay circuit eliminates the need for external capacitors to set delay time
• CMOS process technology ensures low current consumption and high detection accuracy
• Manual reset capability allows for active system control independent of voltage thresholds

Applications

• Embedded systems requiring reliable power-on reset sequences
• Microcontroller unit (MCU) supervision in industrial environments
• Battery-powered devices needing precise voltage monitoring

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm RoHS compliance documentation matches specific manufacturing batches. Validate pinout compatibility with existing PCB footprints before integration. Check for obsolescence notices from ROHM Semiconductor regarding final purchase dates.

Selection Notes

Select this component when a fixed 2.9 V threshold with manual reset is required. Ensure the open-drain output configuration aligns with downstream logic levels. Verify that the 100 ms fixed delay meets system timing requirements without external components.

Part Context

Part of the BD45 series, designed for general-purpose voltage monitoring. Utilizes CMOS processes for efficiency. Offers a wide range of detection voltages in 0.1 V steps across the family. Provides both Nch Open Drain and CMOS output options depending on the specific suffix.

Replacement Considerations

BD5229G-1 is listed as a similar level replacement with the same package. Note that the BD5229G-1 offers adjustable delay time instead of fixed delay. Verify functional equivalence for manual reset and output type before substitution.