BU45K362G-TL

Overview

The BU45K362G-TL is a fixed-delay voltage detector IC from ROHM Semiconductor, designed for monitoring single-input power supply lines. It features an open-drain output and operates within a supply voltage range of 0.6 V to 6 V. The device triggers a reset at a typical threshold voltage of 3.6 V with ±1% precision. It includes a fixed reset delay timer of 200 ms and maintains low power consumption with a circuit current of 2.3 μA in the ON state. The component is housed in an SSOP-3 package and supports an operating temperature range from -40°C to +105°C.

Feature Summary

• Provides reliable system supervision through a fixed threshold voltage detection mechanism with high accuracy.
• Ensures stable initialization by incorporating a fixed internal delay timer before asserting the reset signal.
• Optimizes energy efficiency with ultra-low standby current consumption suitable for battery-powered applications.

Applications

• Microprocessor and microcontroller system reset circuits
• Battery-operated electronic devices requiring voltage supervision
• Industrial control systems needing wide temperature operation

Procurement Notes

Verify the obsolete status and non-recommended-for-new-designs classification before procurement. Confirm availability through authorized distributors or surplus channels. Ensure compatibility with existing PCB footprints and validate that the SSOP-3 package meets thermal and mechanical requirements for the target application environment.

Selection Notes

Select this component when a fixed 3.6 V threshold and 200 ms delay are required. Consider the BD5236G-1 as a recommended alternative if adjustable delay or lower current consumption is needed. Evaluate the open-drain output capability against the load requirements of the downstream logic circuitry.

Part Context

This part belongs to the BU45/BU46 series of supervisory circuits manufactured by ROHM Semiconductor. It is specifically engineered for compact surface-mount applications. The series focuses on providing essential voltage monitoring functions in minimal footprint packages, targeting cost-sensitive and space-constrained electronic designs.

Replacement Considerations

The BD5236G-1 is listed as a similar specification replacement. Note differences in package type (SSOP-5 vs SSOP-3) and delay adjustability. Verify pinout compatibility and electrical parameter alignment before substitution.

FAQ

What is the reset active state of the BU45K362G-TL?

The reset output is active low, meaning it pulls the output line low when the monitored voltage falls below the threshold.

Does the BU45K362G-TL include a manual reset function?

No, the device does not support manual reset; it relies solely on automatic voltage detection.