BD5333G-TR

Overview

The BD5333G-TR is a voltage detector from the ROHM BD53 series, designed for monitoring single-channel power supply voltages. It features a typical threshold detection voltage of 3.3 V with a precision of ±1%. The device operates within a reset active voltage range of 0.95 V to 10 V and utilizes a CMOS output type that asserts low during reset conditions. It incorporates an adjustable delay timer function and maintains a hysteresis voltage defined as VDET multiplied by 0.05. The component supports a manual reset input absence and lacks watchdog or battery backup switching capabilities. It is housed in an SSOP-5 package and functions across a temperature range of -40°C to 105°C.

Feature Summary

• Features an adjustable delay timer circuit allowing customizable reset timing via external resistance.
• Provides high-precision voltage detection with a typical accuracy of ±1% at the threshold point.
• Utilizes a CMOS push-pull output structure for direct interfacing with digital logic systems.

Applications

• Monitoring microprocessor power supply rails for under-voltage conditions
• Providing reset signals for embedded system controllers
• Ensuring stable startup sequences in portable electronic devices

Procurement Notes

Verify current lifecycle status as the component may be designated Not Recommended for New Designs (NRND). Confirm availability through authorized distributors as stock levels fluctuate. Ensure the SSOP-5 package variant matches your PCB footprint requirements. Check for RoHS compliance documentation if required for specific regulatory standards. Validate that the 3.3V threshold aligns precisely with your target system voltage specifications before finalizing procurement.

Selection Notes

Select this component when a fixed 3.3V detection threshold with high accuracy is required. The adjustable delay feature makes it suitable for applications needing controlled reset pulse widths. Consider the CMOS output capability for driving standard logic inputs directly. Evaluate the operating voltage range to ensure compatibility with your system's minimum and maximum supply levels. The SSOP-5 package offers a compact solution for space-constrained designs requiring surface-mount technology.

Part Context

This part belongs to the ROHM BD53 series of voltage detectors, which are specialized supervisory circuits. The series focuses on providing reliable reset generation for digital systems. The BD5333G-TR specifically targets the 3.3V market segment with precise monitoring capabilities. It complements other variants in the family that offer different thresholds or output types.

Replacement Considerations

BD5233G-1TR is documented as a recommended replacement with the same pinout and package.