BD5222G-1TR

Overview

The BD5222G-1TR is a Nano Energy™ CMOS voltage detector with an adjustable delay timer, manufactured by ROHM Semiconductor. It features a typical under-voltage detection threshold of 2.2V with ±0.9% precision and an active reset range of 0.8V to 6V. The device utilizes an N-channel open-drain output and consumes ultra-low current (0.23µA ON, 0.27µA OFF). Hysteresis is set at VDET x 0.05. It operates within -40°C to 85°C in an SSOP5 package.

Feature Summary

• Nano Energy™ technology enables ultra-low current consumption for extended battery life.
• Delay time setting is controlled by an external capacitor for flexible timing configuration.
• N-channel open-drain output type provides versatile interface compatibility.

Applications

• Portable devices requiring long driving times from small batteries
• General-purpose voltage monitoring circuits
• Embedded systems needing precise power supply supervision

Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging when ordering. Confirm that the 'BD5222G-1' designation corresponds to the adjustable delay variant, distinct from standard fixed-delay models. Ensure the SSOP5 package dimensions match the target PCB footprint requirements before finalizing procurement specifications.

Selection Notes

Select this component when adjustable reset delay is required via an external capacitor rather than internal fixed timing. Choose the BD5222G-1 over non-adjustable variants if system startup sequencing demands customizable delays. Verify that the 2.2V threshold aligns with the monitored rail's minimum operating voltage.

Part Context

This part belongs to the BD52xx series of voltage detectors, which are designed for low-power applications. The '1' suffix typically denotes the adjustable delay feature within this family. It serves as a modern replacement for older BU-series detectors like the BU4922G, offering improved precision and lower current consumption.

Replacement Considerations

The BD5222G-1 is listed as a recommended replacement for the BU4922G and BU4822G. While pin-compatible, verify that the adjustable delay feature does not conflict with existing circuit designs relying on immediate reset responses.

FAQ

How is the reset delay time determined?

The delay time is set by connecting an external capacitor to the designated pin; the duration is controlled by the capacitance value.

Is this component suitable for automotive applications?

No, the datasheet explicitly states that this product is not recommended for use in automotive equipment.