BU4912F-TR

Supervisors Overview

The BU4912F-TR is a standard voltage detector manufactured by Rohm Semiconductor, designed for monitoring single-channel power supply voltages. It operates within a reset active voltage range of 0.7 V to 7 V and features a typical under-voltage detection threshold of 1.2 V with ±1% precision. The device utilizes a CMOS output type with a low reset state and lacks manual reset or watchdog timer functions. Packaged in an SOP4 format (2.0x2.1 mm), it supports a minimum packing quantity of 3000 units in taping configuration. The component is rated for operation between -40°C and 125°C.

Supervisors Feature Summary

• Provides simple voltage supervision with high accuracy detection thresholds
• Features CMOS output interface compatible with digital logic systems
• Compact surface-mount packaging suitable for space-constrained designs

Supervisors Applications

• Microprocessor system power supply monitoring
• Battery-operated device voltage supervision
• Embedded controller reset signal generation

Supervisors Procurement Notes

Verify the current lifecycle status as the BU4912F series is designated for last-time buy or end-of-life support. Confirm that the SOP4 package dimensions match the target PCB footprint, noting the replacement BD5212G-1 uses SSOP5. Ensure compatibility with existing design files before finalizing procurement orders for this discontinued component family.

Supervisors Selection Notes

Select this component only for legacy system maintenance or replacement where SOP4 pinout compatibility is critical. Evaluate the BD5212G-1 as a recommended alternative if SSOP5 package acceptance is possible, noting differences in output drive strength and delay timer capabilities. Verify that the fixed 1.2 V threshold meets the specific circuit requirements without need for adjustable settings.

Supervisors Part Context

This part belongs to Rohm's standard voltage detector lineup, specifically engineered for low-cost, high-reliability supervision tasks. The BU4912F variant represents an earlier generation using SOP4 packaging, distinct from the newer G-series devices which offer SSOP5 packages and potentially enhanced electrical characteristics like adjustable delays.

Supervisors Replacement Considerations

The BD5212G-1 is listed as a similar specification replacement. Note the package change from SOP4 to SSOP5 requires PCB layout modification. Electrical parameters such as output type and hysteresis remain comparable, but verify drive current specifications.