BU4327F-TR

Overview

The BU4327F-TR is a single-channel voltage detector manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It features an adjustable reset delay timer and operates within a supply voltage range of 0.7 V to 7 V. The typical under-voltage detection threshold is set at 2.7 V with a precision of ±1%. The device utilizes a CMOS output type and is housed in a compact SOP-4 package. It supports surface mount installation and functions reliably across an extended temperature range from -40°C to +125°C.

Feature Summary

• Provides low-voltage detection with an adjustable reset delay timer for customized timing control.
• Features a CMOS output interface compatible with standard digital logic circuits.
• Operates over a wide supply voltage range up to 7 V with high accuracy.
• Designed for surface-mount assembly in space-constrained applications.

Applications

• Portable electronic devices requiring low-voltage monitoring
• Battery-powered systems needing power-fail detection
• Microprocessor reset circuits in embedded systems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific ordering suffix matches the required packaging format. Check current lifecycle status as availability may be limited. Ensure environmental compliance documentation aligns with project requirements. Validate pinout compatibility during integration planning.

Selection Notes

Evaluate the fixed 2.7 V detection threshold against system voltage rails. Consider the CMOS output drive capability for load requirements. Assess the adjustable delay timer functionality against startup sequence needs. Verify operating temperature range suitability for the intended environment. Compare package dimensions against PCB layout constraints.

Part Context

This component belongs to the BU42(43)xxF series of supervisory circuits from ROHM Semiconductor. These devices are engineered for reliable power management in consumer and industrial electronics. The series offers various detection thresholds and packaging options to suit diverse design specifications while maintaining consistent performance characteristics.

Replacement Considerations

BD5227G-1 is listed as a recommended replacement with the same pinout configuration. Note that the substitute uses an SSOP5 package instead of SOP4. Output types differ, with the replacement offering open-drain rather than CMOS. Verify electrical parameter compatibility before implementation.

FAQ

What is the typical detection voltage for this model?

The typical under-voltage detection voltage is 2.7 V.

Does the BU4327F-TR include a manual reset function?

No, the device does not feature a manual reset input.

Is a watchdog timer integrated into this circuit?

No, the BU4327F-TR does not include a watchdog timer.