BD4957G-TR

Overview

The BD4957G-TR is a standard voltage detector manufactured by ROHM Semiconductor, designed for monitoring single power supply rails. It features a typical under-voltage detection threshold of 5.7V with a precision of ±1%. The device operates within a reset active voltage range of 0.95V to 10V and utilizes a CMOS output type. It does not include manual reset, watchdog timer, or adjustable delay functions. The circuit current is specified at 0.60μA when active (VS=4.8V) and 0.85μA when off (VS=4.8V). Hysteresis is defined as VS x 0.05 or Vdet x 0.05. It is housed in an SSOP-5 package.

Feature Summary

• CMOS output structure for low-power operation
• High accuracy voltage detection with ±1% precision
• Wide operating voltage range supporting various system requirements

Applications

• Microprocessor system supervision
• Portable equipment power management
• Battery-operated device monitoring

Procurement Notes

Verify the specific suffix 'G-TR' against official ROHM documentation to confirm the SSOP-5 package and tape-and-reel packaging configuration. Confirm RoHS compliance status through the manufacturer's latest datasheet. Ensure the part number matches the exact threshold voltage requirement of 5.7V for your design.

Selection Notes

Select this component when a fixed 5.7V threshold is required for voltage supervision. The CMOS output is suitable for direct interfacing with digital logic. Consider the low standby current for battery-sensitive applications. Verify that the absence of a watchdog timer and manual reset function aligns with the system's safety architecture.

Part Context

This part belongs to the BD49 series of standard voltage detectors from ROHM. These devices are engineered for compact surface-mount applications. The series offers various threshold voltages to accommodate different logic families and power rail standards. The BD4957G-TR specifically targets systems requiring precise monitoring around the 5.7V level.

Replacement Considerations

BD5250G-1TR is listed as a similar level replacement with comparable specifications.