BU4328G-TR

Overview

The BU4328G-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-input power supply lines. It operates within a supply voltage range of 0.7 V to 7 V and features an adjustable reset delay timer. The device provides a low-active output with a typical threshold voltage of 2.8 V and high accuracy of ±1%. It consumes minimal static current, typically 450 nA, and functions reliably across an extended temperature range from -40°C to +125°C.

Feature Summary

• CMOS architecture ensures ultra-low power consumption suitable for battery-operated systems.
• Adjustable reset delay timer allows customization of response timing via external components.
• High detection accuracy of ±1% ensures precise voltage monitoring without manual reset functionality.

Applications

• Portable electronic devices requiring low standby current
• Battery-powered equipment needing reliable under-voltage protection
• General-purpose supervisory circuits in consumer electronics

Procurement Notes

Verify component authenticity through authorized channels as the part is marked Not Recommended for New Designs (NRND). Confirm RoHS compliance status and check for available replacement alternatives like the BD5228G-1TR if sourcing new inventory proves difficult due to end-of-life status.

Selection Notes

Select this component when a low-cost, single-channel voltage monitor with adjustable delay is required. Ensure the application supports the SSOP-5 package dimensions and that the 2.8 V threshold aligns with the system's minimum operating voltage requirements before finalizing the design.

Part Context

This part belongs to the BU42(43)xxG series of simple reset/voltage detectors. It is categorized under PMIC Supervisory Circuits. The device is distinct from watchdog timers or multi-channel monitors, focusing solely on basic under-voltage detection with a push-pull/totem pole output structure.

Replacement Considerations

The BD5228G-1TR is listed as a similar replacement with the same pinout and package. Verify electrical parameter compatibility, particularly output drive strength and hysteresis characteristics, before substituting.

FAQ

Does the BU4328G-TR include a manual reset function?

No, the device does not feature a manual reset input; it operates automatically based on detected voltage levels.

What is the maximum supply voltage for this detector?

The maximum operating supply voltage is 7 V.