BU46L302G-TL

Supervisors Overview

The BU46L302G-TL is a voltage detector IC from the ROHM BU45/BU46 series, designed for monitoring single-input power supplies. It features a fixed reset delay time of 200 ms and operates with a maximum supply voltage of 6 V. The device detects under-voltage conditions at a threshold of 3.0 V with an accuracy of ±1%. It consumes a quiescent current of 2.8 µA in the OFF state and 2.3 µA in the ON state. The output is CMOS type with a low active state. It functions within a temperature range of -40°C to +105°C and is housed in an SSOP-3 package.

Supervisors Feature Summary

• Built-in counter timer delay circuit eliminates the need for external capacitors for delay time setting.
• CMOS output type provides a low-active reset signal without requiring manual reset functionality.
• High detection accuracy of ±1% ensures reliable voltage monitoring across the operating temperature range.

Supervisors Applications

• Monitoring battery-powered devices for low voltage conditions
• Supervising microprocessor reset lines in embedded systems
• Protecting memory circuits during power-down sequences

Supervisors Procurement Notes

Verify component status as obsolete or NRND before integration. Confirm availability through authorized distributors only. Check RoHS compliance details on official datasheets. Ensure pinout compatibility with existing PCB layouts. Validate thermal performance within specified operating temperatures.

Supervisors Selection Notes

Select this part for applications requiring precise 3.0 V detection with minimal external components. Consider the fixed 200 ms delay for system startup stability. Evaluate the low quiescent current for battery life optimization. Compare against newer series if long-term supply assurance is critical.

Supervisors Part Context

This component belongs to the BU45/BU46 series of highly accurate, low current consumption voltage detectors. These ICs are characterized by their internal delay timer, which simplifies circuit design by removing external timing capacitors. The series offers various threshold voltages to suit different supply rail requirements.

Supervisors Replacement Considerations

The BD5230G-1 is listed as a similar specification replacement. Note that the substitute uses an SSOP-5 package instead of SSOP-3, requiring layout adaptation. The substitute also features adjustable delay and open-drain output, differing from the fixed delay and CMOS push-pull output of the original.