BU46K232G-TL

Supervisors Overview

The BU46K232G-TL is a fixed-delay voltage detector IC from the BU45/BU46 series by ROHM Semiconductor. It operates within a supply voltage range of 0.6 V to 6 V and features a detection threshold of 2.3 V with ±1% accuracy. The device provides a CMOS output type and includes an internal reset delay timer of 200 ms, eliminating the need for external capacitors. It consumes a quiescent current of 2.8 µA in the OFF state and functions across a temperature range of -40°C to +105°C. Packaged in an SSOP-3 format, it monitors a single input without manual reset or watchdog capabilities.

Supervisors Feature Summary

• Integrates a built-in counter timer delay circuit to provide a fixed 200 ms reset delay without requiring external timing components.
• Delivers high detection accuracy of ±1% for the 2.3 V threshold voltage to ensure reliable system supervision.
• Features low power consumption with a typical operating current of 2.8 µA in the OFF state.

Supervisors Applications

• Monitoring battery voltage levels in portable electronic devices
• Supervising power supply rails in embedded systems
• Providing reset signals for microcontrollers during power-up sequences

Supervisors Procurement Notes

Verify component authenticity through authorized channels as this part is marked Not Recommended for New Designs (NRND). Confirm package integrity upon receipt due to moisture sensitivity classification. Check latest datasheets for any updates regarding end-of-life status or recommended replacement parts like the BD5223G-1TR before finalizing procurement plans.

Supervisors Selection Notes

Select this component when a fixed delay time is acceptable and minimal external component count is required. The CMOS output allows direct interfacing with digital logic. Consider the NRND status for long-term projects; evaluate alternative supervisory circuits if future availability is critical. Ensure the 2.3 V threshold aligns with the specific voltage rail requiring monitoring.

Supervisors Part Context

This voltage detector belongs to the BU45/BU46 series, designed for applications requiring precise under-voltage detection with low standby current. The series distinguishes itself by integrating delay timers internally, simplifying board layout compared to adjustable delay counterparts. It serves as a compact solution for basic power management tasks in consumer and industrial electronics.

Supervisors Replacement Considerations

The BD5223G-1TR is listed as a similar specification replacement. Note that the substitute uses an SSOP-5 package instead of SSOP-3, requires pin rotation adaptation, and offers adjustable delay rather than fixed delay. Verify electrical compatibility and mechanical fit before substitution.

Supervisors FAQ

Does the BU46K232G-TL require an external capacitor for the reset delay?

No, the device has a built-in counter timer delay circuit that provides a fixed 200 ms delay without needing external capacitors.

What is the output configuration of this voltage detector?

The BU46K232G-TL features a CMOS output type.