BU4212F-TR

Overview

The BU4212F-TR is a CMOS voltage detector IC from ROHM Semiconductor featuring an adjustable output delay time. It provides a typical under-voltage detection threshold of 1.2V with high precision accuracy of ±1%. The device operates within a reset active voltage range of 0.7V to 7V and utilizes an open-drain output type. Key electrical characteristics include a circuit current consumption of 0.40µA (ON) and 0.55µA (OFF) at VDET=4.8V, along with a hysteresis voltage defined as VDET x 0.05. It supports an external delay circuit resistance of 10.0MΩ and functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Features an adjustable delay timer for flexible reset timing control
• Delivers high detection voltage accuracy of ±1% for reliable monitoring
• Operates with ultra-low current consumption suitable for battery-powered applications
• Provides an open-drain output compatible with various logic families

Applications

• Portable electronic devices requiring low power supervision
• Battery-operated equipment needing under-voltage protection
• General-purpose microcontroller reset circuits
• Industrial control systems operating in wide temperature ranges

Procurement Notes

Verify the specific ordering suffix and package variant during procurement, as availability may vary by region. Confirm that the component meets RoHS compliance requirements for your target market. Check for any end-of-life or last-time-buy notices associated with this specific part number before finalizing orders. Ensure compatibility with existing PCB footprints and assembly processes.

Selection Notes

Select this component when precise voltage monitoring with customizable delay is required. Consider the open-drain output configuration for interfacing with different logic levels. Evaluate the operating temperature range against environmental conditions. Compare current consumption metrics with alternative supervisors if power efficiency is critical. Verify package dimensions fit within spatial constraints.

Part Context

This component belongs to the BU42xx series of CMOS voltage detectors designed for low-voltage applications. It complements other variants like the BU4211F and BU4221F, which offer different detection thresholds. The series is characterized by its compact SOP4 package and adjustable delay functionality, distinguishing it from fixed-delay supervisors.

Replacement Considerations

The BD5212G-1 is documented as a recommended replacement with the same pinout. Note that the substitute uses an SSOP5 package instead of SOP4, requiring layout adjustment. Verify electrical parameter compatibility, particularly regarding current consumption and reset voltage ranges, before substitution.