4.7V threshold — the rail it watches
The BD45472G-TR is a single-channel voltage detector from ROHM's BD45xxx series, built to assert a reset when the monitored supply drops below 4.7 V. That threshold targets 5 V logic rails — the detector holds the reset output active until the supply recovers above the threshold plus hysteresis, then releases after a 180 ms minimum timeout. The open-drain output needs a pull-up resistor to the reset line's own rail; choose the pull-up value so the output sinks current within the device's rated capability at the reset voltage level.
Industrial temperature range — where it fits
The SOT-753 (SC-74A) package keeps the footprint small, but the thermal path is through the leads; in a still-air enclosure above 85°C, verify the junction temperature stays within the absolute maximum by checking the power dissipation from the pull-up current and any leakage.
Active production — no LTB clock ticking
No last-time-buy notice or successor has been issued for this order code.