BD4737G-TR

Overview

The BD4737G-TR is a standard voltage detector IC from ROHM Semiconductor, designed for monitoring power supply levels. It features a fixed under-voltage detection threshold of 3.7V with a typical precision of ±1%. The device operates within a reset active voltage range of 0.85V to 10V and utilizes an open collector output type. It consumes a circuit current of 1.5μA in the ON state and 1.6μA in the OFF state. The component includes a hysteresis voltage of 0.05V and supports an L output current of 15mA at low voltage. It functions without a manual reset or watchdog timer and is housed in an SSOP5 package.

Feature Summary

• Fixed 3.7V under-voltage detection threshold with high accuracy
• Open collector output configuration for flexible interfacing
• Low static current consumption suitable for battery-powered systems
• Built-in hysteresis to prevent output oscillation during threshold transitions

Applications

• Monitoring microprocessor power supply rails
• Battery-operated electronic devices requiring voltage supervision
• Industrial control systems needing reliable reset signals
• Consumer electronics with fixed voltage thresholds

Procurement Notes

Verify the specific ordering suffix TR for tape-and-reel packaging requirements. Confirm RoHS compliance status as indicated in official documentation. Check current supply status, as this part may be subject to last-time-buy notices. Ensure the SSOP5 package dimensions match the target PCB footprint. Validate that the open collector output compatibility aligns with the downstream circuit design.

Selection Notes

Select this component when a fixed 3.7V detection threshold is required without adjustable settings. Choose the open collector output if external pull-up resistors are preferred or necessary for level shifting. Consider the low current consumption for applications prioritizing energy efficiency. Verify that the absence of a delay timer meets the system's reset timing requirements.

Part Context

The BD4737G belongs to ROHM's standard voltage detector series, offering fixed detection voltages for general-purpose power monitoring. It is part of a lineup that includes various threshold options to suit different supply rail standards. The device is designed for surface-mount assembly, providing a compact solution for space-constrained designs. It complements other supervisory circuits by providing simple, reliable voltage monitoring capabilities.

Replacement Considerations

The BD5237G-1 is a recommended replacement with the same SSOP5 package and 3.7V detection voltage. Note differences in output type (open drain vs. open collector) and current specifications. Verify compatibility regarding reset active voltage ranges and hysteresis characteristics before substitution.