BU4835F-TR

Supervisors Overview

The BU4835F-TR is a standard CMOS reset IC from ROHM Semiconductor, functioning as a processor supervisor with a fixed detection voltage of 3.5V. It features an N-channel open-drain output and operates within a supply voltage range of 0.7V to 7V. The device offers high accuracy with a detection voltage precision of ±1% and includes hysteresis defined as VDET x 0.05. Circuit current consumption is specified at 0.40μA (ON) and 0.55μA (OFF) when VDET=4.8V. It supports a low-level output current of 3.3mA and high-level of 6.5mA. The component is housed in a SOP4 package measuring 2.0x2.1mm with a thickness of 1.05mm, rated for temperatures from -40°C to 125°C.

Supervisors Feature Summary

• High-accuracy voltage monitoring with ±1% detection precision
• Low current consumption suitable for battery-powered applications
• N-channel open-drain output interface for direct logic connection

Supervisors Applications

• Processor system supervision
• Voltage level monitoring in portable devices
• Reset signal generation for microcontrollers

Supervisors Procurement Notes

Verify the specific suffix 'F' corresponds to the SOP4 package variant, as other suffixes like 'G' indicate SSOP5 packages. Confirm supply status, as documentation indicates this series may be subject to Last Time Buy or Not Recommended for New Design statuses. Ensure compatibility with the required 3.5V threshold and open-drain output configuration before ordering.

Supervisors Selection Notes

Select this part when a fixed 3.5V threshold is required with an open-drain output. Compare against the BD5235G-1 if an adjustable delay timer or different package form factor is acceptable. Consider the SOP4 footprint constraints versus the alternative SSOP5 options available in the broader BU48xx series.

Supervisors Part Context

The BU4835F-TR belongs to ROHM's standard CMOS reset IC series, which provides low current consumption and high accuracy. This series covers detection voltages from 0.9V to 4.8V in 0.1V increments. The BU4835F specifically targets applications requiring a 3.5V supervision level with minimal quiescent current draw.

Supervisors Replacement Considerations

BD5235G-1TR is listed as a recommended replacement with similar specifications, though it utilizes an SSOP5 package instead of SOP4 and includes an adjustable delay timer feature not present in the BU4835F.