BU4245G-TR

Overview

The BU4245G-TR is a voltage detector IC in an SSOP-5 package, designed for monitoring power supply levels. It features an adjustable delay timer and an open-drain output with low-active reset state. The typical under-voltage detection threshold is 4.5V with ±1% precision. The reset active voltage range spans from 0.7V to 7V. Operating current is specified at 0.40μA (ON) and 0.55μA (OFF) at VDET=4.8V. Hysteresis is set at VDET x 0.05. Output currents are 3.3mA (Low Vol) and 6.5mA (High Vol). The internal delay circuit resistance is 10.0MΩ. It operates within a temperature range of -40°C to 125°C.

Feature Summary

• Provides voltage supervision with an adjustable delay timer for customized reset timing.
• Features an open-drain output structure compatible with various logic families.
• Includes built-in hysteresis to prevent output oscillation during threshold transitions.

Applications

• Microprocessor power supply monitoring
• Portable battery-powered equipment supervision
• Multi-output power system reset circuits

Procurement Notes

Verify the obsolete status before procurement, as this component is not recommended for new designs. Confirm availability through authorized distributors for existing production needs. Ensure the ordering part number matches the specific tape-and-reel configuration required for your assembly process. Cross-reference replacement options if long-term supply stability is a priority for the product lifecycle.

Selection Notes

Select this component when an adjustable delay timer is required alongside standard voltage detection. The open-drain output allows flexibility in pull-up resistor selection for different logic voltage levels. Consider the wide reset active voltage range for applications requiring operation across varying supply conditions. Verify that the SSOP-5 package fits the available PCB footprint constraints.

Part Context

This device belongs to ROHM's voltage detector family, specifically engineered for microprocessor reset applications. It serves as a legacy solution for systems requiring precise voltage monitoring with customizable delay characteristics. The component is part of a broader portfolio of power management ICs designed for consumer electronics and industrial control systems.

Replacement Considerations

The BD5245G-1 is a recommended replacement with the same pinout and package. It offers similar functionality but may have updated manufacturing specifications. Verify compatibility regarding output current capabilities and operating temperature ranges before substitution.