BD46345G-TR

Overview

The BD46345G-TR is a voltage detector IC from the BD46xxx series, manufactured by ROHM Semiconductor. It features a fixed delay time of 50 msec and supports manual reset functionality. The typical under-voltage detection voltage (Vdet) is 3.4 V with a precision of ±1%. The reset active voltage range spans from 0.95 V to 10 V. The output type is CMOS. Circuit current consumption is 0.80 μA when on (at Vdet=4.8 V) and 0.85 μA when off (at Vdet=4.8 V). It operates within a temperature range of -40°C to +105°C and is housed in an SSOP-5 package.

Feature Summary

• Built-in counter timer delay circuit eliminates the need for external capacitors for delay time setting.
• High accuracy voltage detection with low current consumption characteristics.
• Supports manual reset function for controlled system recovery.

Applications

• Processor supervisor circuits requiring precise voltage monitoring.
• Systems needing fixed delay reset times without external timing components.
• Low power electronic devices utilizing CMOS output interfaces.

Procurement Notes

Verify the specific ordering suffix and package variant against the official datasheet before procurement. Confirm supply status as the component may be subject to end-of-life or last-time-buy notices. Ensure compatibility with existing PCB footprints for the SSOP-5 package. Cross-reference RoHS compliance requirements with project specifications. Validate that the fixed 50 msec delay meets the target application's timing constraints.

Selection Notes

Select this component when a fixed 50 msec reset delay is required without external timing capacitors. Choose based on the 3.4 V detection threshold and ±1% precision requirements. Consider the low standby current of approximately 0.85 μA for battery-operated applications. Ensure the operating voltage range up to 10 V covers the system's maximum input. Verify the CMOS output drive capability matches the downstream logic inputs.

Part Context

The BD46345G-TR belongs to the BD46xxx series of voltage detectors. This series is characterized by high accuracy and low current consumption. The integrated timer circuit simplifies design by removing the need for external delay-setting components. The part is designed for supervisory applications in portable and industrial electronics.

Replacement Considerations

The BD5234G-1 is listed as a similar level replacement with the same package. Verify if the adjustable delay feature of the substitute meets the fixed delay requirement of the original design. Check for differences in reset active state and manual reset support.