BU4837F-TR

Supervisors Overview

The BU4837F-TR is a standard CMOS voltage detector IC manufactured by ROHM Semiconductor. It features an open-drain output type and operates within a reset active voltage range of 0.7 to 7 V. The typical under-voltage detection voltage is 3.7 V, with a precision of ±1%. The device consumes 0.40 μA in the ON state and 0.55 μA in the OFF state at a detection voltage of 4.8 V. Hysteresis voltage is set at VDET x 0.05. It lacks a reset delay timer, manual reset, and watchdog timer functions. The component supports a maximum supply voltage of 7 V and operates across a temperature range of -40°C to 125°C.

Supervisors Feature Summary

• CMOS technology for low power consumption
• Open-drain output configuration
• High detection voltage precision
• Wide operating temperature range

Supervisors Applications

• Portable equipment battery monitoring
• Microprocessor system reset circuits
• Battery-powered device supervision

Supervisors Procurement Notes

Verify the specific suffix and package variant against the official datasheet to ensure compatibility with existing designs. Confirm that the open-drain output requirements align with the target system's pull-up resistor specifications. Check current lifecycle status as this series may be subject to discontinuation or last-time-buy notices. Ensure thermal management meets the specified operating temperature limits during installation.

Supervisors Selection Notes

Select this component when a fixed 3.7 V threshold is required without adjustable delay features. Consider the open-drain output capability for interfacing with various logic levels. Evaluate the low standby current for battery-operated applications where power efficiency is critical. Compare performance metrics against newer alternatives if extended availability or enhanced features like watchdog timers are needed.

Supervisors Part Context

This part belongs to ROHM's standard voltage detector family, designed for supervisory applications in portable electronics. It provides reliable reset signals for microprocessors and memory devices. The SOP-4 package offers a compact footprint suitable for space-constrained designs. The series emphasizes high accuracy and low current consumption for efficient power management.

Supervisors Replacement Considerations

BD5237G-1TR is listed as a recommended replacement with similar specifications, including a 3.7 V detection voltage and open-drain output. Note differences in package type (SSOP-5 vs SOP-4) and potential variations in hysteresis and current consumption. Verify pinout compatibility before substitution.