BU4819FVE-TR

Supervisors Overview

The BU4819FVE-TR is a CMOS voltage detector IC manufactured by Rohm Semiconductor, designed for monitoring single-channel power supply voltages. It features an open-drain output type and operates within a supply voltage range of up to 7 V. The device detects under-voltage conditions with a typical threshold of 1.9 V and offers high precision accuracy of ±1%. It functions without manual reset or watchdog timer capabilities, utilizing a low-power design with static current consumption as low as 350 nA. The component supports surface-mount installation in a VSOF-5 package and maintains operational reliability across an extended temperature range from -40°C to +125°C.

Supervisors Feature Summary

• CMOS technology enables ultra-low power consumption suitable for battery-operated applications
• Open-drain output configuration allows flexible interfacing with various logic families
• High detection accuracy ensures reliable system reset during voltage fluctuations
• Extended operating temperature range supports deployment in harsh environmental conditions

Supervisors Applications

• Portable electronic devices requiring efficient power management
• Battery-powered systems needing precise voltage level monitoring
• Industrial control circuits operating in extreme temperature environments
• Consumer electronics utilizing single-supply voltage architectures

Supervisors Procurement Notes

Verify the specific suffix FVE-TR against official Rohm documentation to confirm package type and tape-and-reel specifications. Confirm end-of-life status through authorized distributors, as this part may be discontinued. Ensure compatibility with existing PCB footprints for the VSOF-5 package. Check for RoHS compliance requirements if applicable to your manufacturing standards. Validate that the open-drain output aligns with your system's pull-up resistor configuration.

Supervisors Selection Notes

Select this component when a simple, low-cost voltage supervisor is required for single-channel monitoring. It is appropriate for designs where manual reset functionality is unnecessary and open-drain outputs are preferred. Consider alternatives if adjustable delay timers or push-pull outputs are needed. Evaluate the 1.9 V threshold against your system's minimum operating voltage to ensure proper reset timing. Verify that the VSOF-5 package fits within your board space constraints.

Supervisors Part Context

This component belongs to Rohm's BU48xx series of standard voltage detectors, which are widely used for basic power supervision tasks. The series offers various threshold voltages to accommodate different logic levels and supply rails. The BU4819 variant specifically targets applications requiring a 1.9 V detection point. These devices are commonly integrated into microcontroller reset circuits and peripheral power sequencing networks.

Supervisors Replacement Considerations

BD5219G-1TR is a confirmed substitute offering similar specifications with SSOP-5 packaging.