BU4337FVE-TR

Overview

The BU4337FVE-TR is a CMOS voltage detector with an adjustable delay time, manufactured by Rohm Semiconductor. It features a typical under-voltage detection voltage of 3.7V and a VDET precision of ±1%. The reset active voltage range spans from 0.7V to 7V, with a CMOS output type and low-active reset state. The circuit current is 0.40μA (ON) and 0.55μA (OFF) at VDET=4.8V. Hysteresis voltage is defined as VDET x 0.05. Output currents are 3.3mA (LowVol) and 6.5mA (HighVol). The delay circuit resistance is 10.0MΩ. Operating temperature ranges from -40°C to 125°C. The package is VSOF5 with dimensions 1.6x1.6mm (t=0.6mm).

Feature Summary

• Adjustable delay timer functionality for customized reset timing.
• CMOS output structure providing high drive capability.
• Wide reset active voltage range supporting various supply levels.
• Low power consumption suitable for battery-operated systems.

Applications

• Microprocessor system reset circuits
• Battery voltage monitoring
• Portable electronic device power management

Procurement Notes

Verify the specific ordering suffix TR for tape-and-reel packaging configuration. Confirm RoHS compliance status as indicated in official documentation. Check supply status for last-time-buy or end-of-life notifications before finalizing procurement plans. Ensure VSOF5 package compatibility with PCB footprint requirements.

Selection Notes

Select this component when an adjustable delay timer is required alongside precise voltage detection. Consider the CMOS output drive strength compared to open-drain alternatives. Evaluate the wide operating temperature range for harsh environment applications. Verify that the 3.7V threshold aligns with the target system's under-voltage protection needs.

Part Context

This part belongs to the BU43xx series of voltage detectors from Rohm Semiconductor. It is designed for simple reset and power-on reset applications without manual reset or watchdog timer functions. The series emphasizes low current consumption and high accuracy for consumer and industrial electronics.

Replacement Considerations

BD5237G-1 is listed as a same pinout replacement option. Note differences in package type (SSOP5 vs VSOF5) and output structure (Open drain vs CMOS). Verify electrical parameter compatibility before substitution.