BD46321G-TR

Overview

The BD46321G-TR is a voltage detector manufactured by ROHM Semiconductor, designed for monitoring supply voltages with high precision. It features a fixed delay time of 100 milliseconds and supports manual reset functionality. The device operates within a threshold voltage range of 0.95 V to 10 V, with a typical detection voltage of 3.2 V and a precision of ±1%. It utilizes an open-drain output type and consumes a circuit current of 0.80 μA at Vdet=4.8V in the active state. The component is housed in an SSOP-5 package and functions reliably across a temperature range of -40°C to +105°C.

Feature Summary

• Provides precise under-voltage detection with a fixed 100 ms delay timer for stable system resets.
• Supports manual reset capability to allow external control over the reset signal generation.
• Features low power consumption suitable for battery-operated applications with minimal standby current.

Applications

• Microprocessor reset circuits requiring fixed delay timing
• Battery-powered devices needing low quiescent current supervision
• Industrial control systems operating in wide temperature environments

Procurement Notes

Verify the specific ordering suffix and package variant against the official datasheet before procurement, as availability may vary by region. Confirm that the fixed delay characteristic meets the system timing requirements, as this model does not support adjustable delays. Ensure compatibility with the target voltage range and check for any end-of-life notices or recommended replacement parts from the manufacturer.

Selection Notes

Select this component when a fixed 100 ms reset delay is required rather than an adjustable one. It is suitable for designs needing manual reset intervention and high accuracy (±1%). Compare with similar models like the BD5232G-1 if adjustable delay or different output types are needed. Ensure the operating voltage range covers the minimum supply voltage of the monitored circuit.

Part Context

This part belongs to the BD46 series of voltage detectors from ROHM Semiconductor. It is often compared with the BD5232G-1, which offers adjustable delay times. The BD46321G-TR is specifically characterized by its fixed delay timer and manual reset feature, distinguishing it from other variants in the family that may lack these specific control options.

Replacement Considerations

The BD5232G-1 is listed as a similar level replacement with the same package but offers adjustable delay instead of fixed delay. Verify functional differences in delay timing and reset control before substitution.