BD46475G-TR

Overview

The BD46475G-TR is a single-channel voltage detector manufactured by ROHM Semiconductor, designed for supervisory circuit applications. It features a fixed threshold detection voltage of 4.7 V with a precision accuracy of ±1%. The device operates within a supply voltage range up to 10 V and includes a manual reset function alongside a fixed delay time of 50 ms. It utilizes a CMOS push-pull output type and is housed in an SSOP-5 package. The component supports an operating temperature range from -40°C to +105°C and consumes a typical static current of 850 nA.

Feature Summary

• Provides high-precision voltage monitoring with ±1% detection accuracy for reliable system supervision.
• Integrates a manual reset capability allowing external control over the reset state generation.
• Features a fixed delay timer to ensure stable power-up sequencing before asserting the reset signal.
• Delivers a CMOS push-pull output suitable for direct interfacing with digital logic circuits.

Applications

• Supervising microcontroller power supplies to prevent erratic operation during brown-out events.
• Monitoring CPU or DSP voltage rails to ensure proper initialization sequences.
• Providing reset signals for embedded systems requiring manual intervention capabilities.

Procurement Notes

Verify component authenticity through authorized channels as this part is marked as discontinued. Confirm that the SSOP-5 footprint matches the target PCB design. Ensure thermal management aligns with the specified power dissipation limits. Check RoHS compliance documentation if required for specific regulatory standards. Validate that the 4.7 V threshold remains appropriate for the target application's voltage levels.

Selection Notes

Select this component when a fixed 4.7 V threshold with high accuracy is required. Consider the manual reset feature if external reset control is necessary. The CMOS output drives loads directly without open-drain limitations. Verify compatibility with the system's maximum supply voltage of 10 V. Ensure the operating temperature range meets environmental requirements.

Part Context

This voltage detector belongs to the BD46 series, which focuses on low-power, high-precision monitoring solutions. It is part of ROHM's portfolio of supervisory circuits designed for industrial and consumer electronics. The SSOP-5 package offers a compact form factor suitable for space-constrained designs. The series emphasizes reliability and stability for critical power management tasks.

Replacement Considerations

The BD5247G-1 is listed as a recommended replacement with the same SSOP-5 package. Note differences in output type (open drain vs. CMOS) and delay adjustability. Verify pinout compatibility and electrical parameter alignment before substitution.

FAQ

Does the BD46475G-TR include a watchdog timer?

No, this component does not integrate a watchdog timer; it functions solely as a voltage detector with a fixed delay.

What is the output configuration of this voltage detector?

It uses a CMOS push-pull (totem pole) output structure, providing both high and low drive capabilities.