BD4959G-TR

Overview

The BD4959G-TR is a standard CMOS voltage detector IC from ROHM Semiconductor, designed for monitoring single power supply rails. It features a fixed detection threshold of 5.9V with a typical accuracy of ±1%. The device operates within a supply voltage range of 0.95V to 10V and consumes ultra-low current, typically 0.6µA when active and 0.85µA when inactive at 4.8V. It provides an active-low reset output with no manual reset or watchdog timer functions. The component is housed in a compact SSOP5 package and supports an operating temperature range from -40°C to +105°C.

Feature Summary

• High-accuracy voltage detection with ±1% tolerance
• Ultra-low current consumption for battery-powered applications
• CMOS push-pull output structure for direct logic interfacing
• Compact SSOP5 package suitable for space-constrained designs

Applications

• Microcontroller system reset circuits
• Logic circuit power supervision
• Battery-operated device voltage monitoring

Procurement Notes

Verify the specific suffix 'G-TR' to confirm the SSOP5 package and tape-and-reel packaging format. Confirm RoHS compliance status as per the latest manufacturer documentation. Check for end-of-life or last-time-buy notices, as this part may be discontinued. Ensure the 5.9V threshold matches the target application requirements precisely.

Selection Notes

Select this component when a fixed 5.9V threshold is required for system supervision. The CMOS output allows for direct connection to digital logic without external pull-up resistors. Consider the low standby current if power efficiency is critical. Verify that the 10V maximum supply voltage accommodates the highest expected input voltage spikes.

Part Context

This part belongs to the BD49xxx series of standard CMOS voltage detectors. Unlike the BD48xxx series which offers open-drain outputs, the BD49xxx series utilizes CMOS outputs for stronger drive capability. The series covers detection voltages from 2.3V to 6.0V in 0.1V increments, providing precise options for various logic families.

Replacement Considerations

BD5250G-1TR is listed as a similar replacement with the same SSOP5 package. Note that the BD5250G-1 has a different detection voltage (5.0V) and open-drain output, requiring design adjustments for threshold and output configuration.