BD99A41F-E2

Overview

The BD99A41F-E2 is a high-accuracy voltage detector with an integrated watchdog timer, manufactured by ROHM Semiconductor. It features a typical threshold voltage of 4.1 V and operates within a power supply range of 1.0 V to 10 V. The device offers detection accuracy of ±1.5% over the operating temperature range of -40°C to +105°C. It consumes a typical quiescent current of 5 µA and provides an active-high, open-drain reset output. The reset delay time is adjustable via an external capacitor connected to the CT terminal.

Feature Summary

• High detection voltage accuracy of ±1.5% across the full industrial temperature range
• Ultra-low power consumption with a typical operating current of 5 µA
• Integrated watchdog timer for system reliability monitoring
• Adjustable reset delay time through external capacitor connection

Applications

• Microprocessor and microcontroller system supervision
• Battery-powered portable devices requiring low standby current
• Industrial control systems needing reliable voltage monitoring
• Embedded systems with watchdog timer requirements

Procurement Notes

Verify component authenticity and datasheet alignment before integration. Confirm package type SOP-8 availability and check RoHS compliance status. Note that this part may be subject to end-of-life restrictions or obsolescence notices. Ensure design-in compatibility with existing circuit parameters and thermal requirements.

Selection Notes

Select this component when precise voltage monitoring and watchdog functionality are required in a single package. Consider the 4.1 V threshold and ±1.5% accuracy for critical applications. Evaluate the 5 µA quiescent current against battery life requirements. Verify that the SOP-8 package fits the PCB layout constraints and that the adjustable delay feature meets timing specifications.

Part Context

The BD99A41F-E2 belongs to the BD99A41F series of supervisory circuits from ROHM Semiconductor. These devices are designed for monitoring power supply voltages in electronic systems. The series typically includes variants with different threshold voltages and features. This specific model integrates both voltage detection and watchdog timer functions in a compact SOP-8 package.

Replacement Considerations

Check ROHM official documentation for direct pin-compatible substitutes within the BD99A41F series. Verify equivalent threshold voltages and accuracy specifications. Confirm package compatibility and electrical characteristics match application requirements before substitution.