BU46K332G-TL

Overview

The BU46K332G-TL is a fixed-delay voltage detector manufactured by ROHM Semiconductor. It operates within a supply voltage range of 0.6 V to 6 V and features a typical threshold voltage of 3.3 V with ±1% accuracy. The device provides a CMOS output type and includes a fixed reset delay timer of 200 ms. It functions without manual reset, watchdog timer, or battery backup switching capabilities. The quiescent current is specified at 2.8 µA. The component is housed in an SSOP-3 package and supports operation across a temperature range of -40°C to +105°C.

Feature Summary

• CMOS output interface for digital logic compatibility
• Fixed 200 ms reset delay timer for stable power-up sequencing
• Low quiescent current consumption for energy efficiency
• High detection accuracy with ±1% threshold precision

Applications

• Portable electronic devices requiring low standby current
• Battery-powered systems needing reliable voltage monitoring
• Embedded circuits utilizing CMOS logic families
• Industrial equipment operating in extended temperature environments

Procurement Notes

Verify the obsolete status of this component before design finalization, as availability may be restricted. Confirm that the SSOP-3 package dimensions align with your PCB footprint requirements. Ensure the 3.3 V threshold matches your system's critical voltage level. Check for moisture sensitivity handling instructions during assembly. Validate that the 6 V maximum supply voltage accommodates your input rail variations.

Selection Notes

Select this part when a fixed 3.3 V detection point is required with minimal external components. The CMOS output simplifies integration with standard logic gates. Consider the 200 ms delay if your system requires a specific power-on stabilization period. The wide operating temperature range makes it suitable for harsh environments. Verify that the lack of manual reset does not conflict with system control strategies.

Part Context

This component belongs to the BU45/BU46 series of supervisory circuits from ROHM. It is designed for compact applications where space is limited, evidenced by the small SSOP-3 package. The series focuses on providing essential voltage monitoring functions with low power consumption. Similar parts in the family may offer different thresholds or additional features like watchdog timers.

Replacement Considerations

The BD5233G-1 is listed as a recommended replacement with similar specifications. Verify pinout compatibility and electrical parameters before substitution. Note that the replacement may have different packaging or ordering suffixes.