BD4929FVE-TR

Overview

The BD4929FVE-TR is a standard voltage detector IC manufactured by Rohm Semiconductor, belonging to the BD49 series. It features a CMOS output type with a typical under-voltage detection threshold of 2.9V and a precision of ±1%. The reset active state is low, and it does not include a manual reset or watchdog timer function. The device operates within a supply voltage range of 0.95V to 10V and has a reset delay timer of 100µs. It supports an operating temperature range from -40°C to +105°C and is housed in a VSOF-5 package.

Feature Summary

• CMOS output interface for direct logic interfacing
• High accuracy voltage detection with ±1% precision
• Low current consumption design for power efficiency
• Built-in 100µs reset delay timer for stable operation

Applications

• Microprocessor system supervision
• Battery-powered equipment monitoring
• Portable electronic devices
• General-purpose voltage level detection

Procurement Notes

This component is officially listed as obsolete and no longer manufactured by Rohm Semiconductor. Procurement should focus on verifying the authenticity of remaining stock from authorized distributors. Buyers must confirm the specific lot date code and physical condition of available units, as availability is limited to last-time-buy inventory or surplus channels. Cross-referencing with recommended replacement parts is advised for new designs.

Selection Notes

Select this part only for maintenance or legacy system repairs where the original BD49 series specification is required. For new product development, consider alternative voltage detectors with similar threshold voltages and package types that are currently in production. Verify that the CMOS output drive capability and reset delay characteristics meet the target circuit requirements before finalizing the selection.

Part Context

The BD4929FVE-TR is part of Rohm's standard voltage detector family, designed for monitoring supply voltages in digital circuits. It provides a reliable reset signal when the input voltage drops below the specified threshold. The VSOF-5 package allows for compact surface-mount installation, making it suitable for space-constrained applications requiring precise voltage supervision.

Replacement Considerations

BD5229G-1TR is a recommended replacement with similar specifications.