BU4219G-TR

Overview

The BU4219G-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 threshold voltage with a typical detection level of 1.9 V. The device offers high precision with a reset accuracy of ±1% and includes an externally adjustable reset delay timer via an external resistor. It utilizes an open-drain output configuration and consumes low current, typically 0.40 μA in the active state and 0.55 μA in the off state at Vdet=4.8V. The component is housed in an SSOP-5 package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Features an externally adjustable reset delay timer allowing customization of response timing through an external resistor connection.
• Provides high-precision voltage monitoring with a typical threshold accuracy of ±1% across the operational temperature range.
• Utilizes an open-drain output structure compatible with various logic families, supporting system integration without additional level shifting.

Applications

• Microprocessor and microcontroller power supply supervision
• Battery-operated equipment voltage monitoring
• Portable electronic devices requiring low standby current

Procurement Notes

Verify the specific suffix 'G' and 'TR' to confirm the SSOP-5 package and tape-and-reel packaging format. Confirm RoHS compliance status as indicated in official documentation. Check the lifecycle status, as this part may be marked as Not Recommended for New Designs (NRND), requiring validation for long-term production viability.

Selection Notes

Select this component when a fixed 1.9 V threshold is required with the flexibility to adjust the reset delay time externally. Ensure the application requires an open-drain output and can accommodate the necessary external resistor for delay setting. Verify that the supply voltage range of 0.7 V to 7 V aligns with the target system's power rails.

Part Context

The BU4219G-TR belongs to the BU42(43)xxG series of voltage detectors from ROHM Semiconductor. This series is characterized by low power consumption and compact packaging options suitable for space-constrained designs. The 'BU42' prefix typically denotes standard voltage detectors with adjustable delay capabilities, distinguishing them from other supervisory circuits with fixed delays or different output types.

Replacement Considerations

The BD5219G-1 is listed as a similar level replacement with the same pinout and package. Verify electrical parameter compatibility, particularly the threshold voltage precision and current consumption specifications, before substitution.