BD46E292G-MTR

Overview

The BD46E292G-MTR is a CMOS voltage detector IC from ROHM Semiconductor, designed for automotive applications with AEC-Q100 qualification. It features a built-in counter timer, eliminating the need for external delay capacitors. The typical detection voltage is 2.9V with ±1% precision. The reset active voltage range spans 0.95V to 10V. It offers a fixed reset delay of 200msec and supports manual reset functionality. The output type is CMOS, with a low active state. Operating current is typically 0.80µA (ON) and 0.85µA (OFF) at VDET=4.8V. Hysteresis is set at VDET x 0.05. Output currents are 1.2mA (Low) and 5mA (High). It operates within -40°C to +105°C in an SSOP-5 package.

Feature Summary

• Built-in counter timer circuit removes requirement for external delay setting capacitor
• Automotive-grade design compliant with AEC-Q100 standards for functional safety support
• Ultra-low current consumption suitable for battery-powered or energy-efficient systems
• CMOS output type with manual reset capability and high accuracy detection

Applications

• Microcontroller reset circuits requiring reliable power supervision
• Logic circuit protection against under-voltage conditions
• Automotive electronic control units (ECUs) needing AEC-Q100 compliance
• Battery backup switching systems monitoring voltage thresholds

Procurement Notes

Verify the specific suffix G-MTR corresponds to the tape-and-reel packaging format containing 3000 units per reel. Confirm that the part status indicates final sale or obsolescence if sourcing for long-term production. Ensure the SSOP-5 package dimensions match the target PCB footprint, noting its similarity to SOT-23-5 JEDEC standards. Cross-reference the AEC-Q100 qualification level required for the specific automotive application environment.

Selection Notes

Select this component when a fixed 200msec delay is acceptable without external components. Choose the CMOS output variant over open-drain if push-pull drive capability is needed. Consider the ±1% precision for tight voltage tolerance requirements. Evaluate the 0.85µA standby current for low-power constraints. Verify the 10V maximum input rating aligns with the system supply voltage. Check if manual reset functionality is necessary for the specific system architecture.

Part Context

This device belongs to the BD46Exxxx-M series of counter timer built-in CMOS voltage detectors. The series provides detection voltages from 2.3V to 4.8V in 0.1V steps. Other variants include BD46E232G-M, BD46E252G-M, and BD46E335G-MTR, offering different detection thresholds and delay times (50ms, 100ms, 200ms). All share the same SSOP-5 package and low-current characteristics.

Replacement Considerations

BD46E292G-M: Identical electrical specifications and pinout; differs only in bulk packaging versus tape-and-reel format.

FAQ

Does the BD46E292G-MTR require an external capacitor for the reset delay?

No, the IC has a built-in counter timer circuit, so no external capacitor is needed for the 200msec fixed delay.

What is the hysteresis voltage characteristic of this voltage detector?

The hysteresis voltage is defined as VDET multiplied by 0.05, providing noise immunity during voltage transitions.

Is this component qualified for automotive use?

Yes, it is AEC-Q100 qualified and categorized as FS supportive for functional safety analysis in automotive applications.