BD4734G-TR

Overview

The BD4734G-TR is a supervisory circuit voltage detector manufactured by ROHM Semiconductor. It features a fixed detection threshold of 3.4V with an accuracy of 1%. The device operates within a supply voltage range up to 10V and utilizes an open collector output type. It is housed in a compact SSOP-5 surface-mount package. The component supports a manual reset function and includes a fixed reset delay timer of 200 ms. It functions without a watchdog timer or battery backup switch, ensuring reliable power monitoring for integrated circuits.

Feature Summary

• Provides precise under-voltage detection with a fixed 3.4V threshold and 1% accuracy.
• Integrates a manual reset input for controlled system recovery.
• Includes a fixed 200 ms reset delay timer to ensure stable power-up sequences.
• Features an open collector output compatible with various logic families.

Applications

• Microcontroller power supply monitoring
• Embedded system reset generation
• Portable electronic device power management

Procurement Notes

Verify the specific suffix G-TR against the manufacturer's current datasheet to confirm package dimensions and tape-and-reel specifications. Ensure compatibility with the target PCB footprint for the SSOP-5 package. Confirm that the open collector output requirements match the downstream circuit design. Check for any end-of-life notices or recommended replacement parts from ROHM before finalizing procurement plans.

Selection Notes

Select this component when a fixed 3.4V detection threshold is required for system supervision. The inclusion of a manual reset pin allows for external control over the reset state, which is useful for debugging or specific startup sequences. The low static current consumption makes it suitable for battery-operated applications where power efficiency is critical. Verify that the 10V maximum operating voltage aligns with the system's power rail.

Part Context

This part belongs to the BD47 series of standard voltage detectors from ROHM Semiconductor. These devices are designed for general-purpose power supply monitoring in consumer electronics and industrial equipment. The series offers various threshold voltages to accommodate different logic levels and power rails, providing a flexible solution for system reliability.

Replacement Considerations

BD5234G-1 is listed as a recommended replacement with similar package and functionality.

FAQ

Does the BD4734G-TR include a watchdog timer?

No, the BD4734G-TR does not include a watchdog timer; it is a simple voltage detector with reset functionality.

What is the reset active state of the output?

The reset output is active low, consistent with the open collector output type specification.