BD4729G-TR

Overview

The BD4729G-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-input supply voltages. It features an open collector output type and operates within a reset active voltage range of 0.85 to 10 V. The device has a typical under-voltage detection voltage of 2.9 V with a precision of ±1%. It consumes 1.5 μA in the ON state and 1.6 μA in the OFF state. The component supports a maximum power dissipation of 540 mW and functions across a temperature range of -40°C to +75°C. It is housed in an SSOP-5 package.

Feature Summary

• Provides precise under-voltage detection with high accuracy for system supervision
• Features low static current consumption for energy-efficient operation
• Utilizes an open collector output compatible with various logic levels
• Operates reliably across a wide industrial temperature range

Applications

• Monitoring battery voltage levels in portable electronic devices
• Supervising power supplies in embedded control systems
• Ensuring stable operation in microprocessor reset circuits
• Protecting data integrity in memory backup systems

Procurement Notes

Verify the specific ordering suffix and packaging configuration against official ROHM documentation before procurement. Confirm that the selected variant matches the required SSOP-5 package dimensions and pinout. Ensure compliance with RoHS directives as indicated in the product specifications. Check for any regional distribution restrictions or availability limitations that may affect sourcing. Validate that the component meets the thermal and electrical requirements of the target application environment.

Selection Notes

Select this component when a fixed 2.9 V threshold is required for single-channel voltage monitoring. Consider the open collector output capability if interfacing with different logic voltage domains. Evaluate the low standby current consumption for battery-powered applications where power efficiency is critical. Ensure the operating temperature range aligns with the environmental conditions of the end-use device. Verify compatibility with the available PCB space for the SSOP-5 footprint.

Part Context

The BD4729G belongs to the BD47 series of standard voltage detectors from ROHM Semiconductor. This series focuses on providing reliable supervision for digital circuits with minimal power consumption. The BD4729G-TR specifically denotes the tape-and-reel packaging format, suitable for automated surface-mount assembly processes. It serves as a fundamental building block for power management architectures requiring simple, accurate voltage monitoring without complex configuration options.

Replacement Considerations

BD5229G-1 is listed as a recommended replacement with the same SSOP-5 package. Verify functional differences such as output type (open drain vs. open collector) and delay timer capabilities before substitution.