BD46352G-TR

Overview

The BD46352G-TR is a voltage detector IC from the BD46xxx series manufactured by ROHM Semiconductor. It features a fixed reset delay timer of 200ms and a typical under-voltage detection threshold of 3.5V with ±1% precision. The device provides an active-low open-drain output and supports manual reset functionality. It operates within a supply voltage range of 0.95V to 10V and consumes ultra-low current, typically 0.80µA when active and 0.85µA when inactive at VDET=4.8V. Hysteresis is set at VDET x 0.05. The component is housed in a 5-pin SSOP package and is rated for an operating temperature range of -40°C to 105°C.

Feature Summary

• Integrates a fixed 200ms delay timer without requiring external capacitors
• Provides high-precision voltage monitoring with ±1% threshold accuracy
• Supports manual reset input for controlled system initialization
• Features ultra-low power consumption suitable for battery-operated applications

Applications

• Portable electronic devices requiring low standby current
• Battery-powered systems needing reliable under-voltage protection
• Embedded controllers requiring precise power-on reset timing
• Industrial equipment operating in wide temperature environments

Procurement Notes

Verify the specific suffix G-TR against the official datasheet to confirm the tape-and-reel packaging configuration. Ensure the design accounts for the open-drain output requirement, which necessitates an external pull-up resistor for proper logic level translation. Confirm that the fixed 200ms delay meets the target application's startup sequence requirements before finalizing the bill of materials.

Selection Notes

Select this component when a fixed delay time is sufficient and external timing components must be minimized. The open-drain output allows flexibility in selecting the pull-up voltage, accommodating various logic families. Compare the 3.5V threshold against other BD46xxx variants if the system voltage rail differs. Consider the manual reset feature if deterministic startup behavior is critical for the microcontroller or FPGA being supervised.

Part Context

This part belongs to the BD46xxx series of CMOS voltage detectors, designed for high accuracy and low current consumption. Unlike adjustable delay models, this variant integrates a fixed timer, simplifying the circuit layout by eliminating external capacitors. It serves as a dedicated power management supervisor for ensuring stable operation of digital circuits during power transitions.

Replacement Considerations

The BD5235G-1TR is documented as a similar level replacement with the same package and pinout. Verify compatibility regarding the output type change from open-drain to adjustable delay if switching to the BD5235G-1TR.