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ROHM Semiconductor BD45352G-TR — Microcontrollers & Processors (MCU / MPU / DSP)

ROHM BD45352G-TR Voltage Detector, 3.5V Threshold

MPNBD45352G-TR
End of Life

ROHM BD45xxx series voltage detector, BD45352G-TR, 3.5V threshold, active-low open-drain output, 180ms minimum reset timeout, -40°C to 105°C operating temperature, SC-74A SOT-753 surface-mount package.

$0.8Ref. price · indicative, final on quote
ROHM Semiconductor BD45352G-TR datasheet (PDF)
PackagingSC-74A, SOT-753
RoHSROHS3 Compliant
SeriesBD45xxx
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

BD45352G-TR specifications
ParameterValue
TypeVoltage Detector
SeriesBD45xxx
MountingSurface Mount
Voltage - threshold3.5V
Number of voltages monitored1
Operating temperature-40°C ~ 105°C (TA)
ResetActive Low
OutputOpen Drain or Open Collector
PackageTape & Reel (TR); Cut Tape (CT)
Reset timeout180ms Minimum
CaseSC-74A, SOT-753

Product details

3.5V threshold — monitoring the 3.3V rail

The ROHM BD45352G-TR is a single-channel voltage detector (supervisor IC) in the BD45xxx series, designed to assert a reset signal when the monitored supply falls below a 3.5V threshold. This threshold sits about 200 mV above a nominal 3.3V rail, so the reset triggers before the rail drops out of regulation — giving the downstream MCU or FPGA a clean shutdown sequence. The active-low, open-drain output can be pulled up to any voltage up to the absolute maximum of the device, making it straightforward to interface with 3.3V or 5V logic without extra level shifters.

180 ms reset timeout — brownout ride-through

For a microcontroller booting from internal flash, 180 ms is ample headroom for the oscillator to stabilize and the bootloader to run.

The 105°C upper limit is typical for engine-bay-adjacent modules that see high ambient temperatures but not direct exhaust heat.

SC-74A / SOT-753 package — board-area fit

The SC-74A (also known as SOT-753) is a 5-pin surface-mount package measuring roughly 2.9 mm by 1.6 mm. It suits compact PCBs in portable instruments, sensor modules, or space-constrained control boards.

Frequently asked questions

Can BD45352G-TR be used as a reset IC for 3.3V systems?

Yes. The 3.5V threshold is about 200 mV above the nominal 3.3V rail, so the reset asserts before the supply drops out of regulation. The active-low open-drain output connects directly to a 3.3V MCU reset pin with a pull-up resistor to 3.3V.

What is the reset timeout of BD45352G-TR?

The reset timeout is a minimum of 180 ms. This means the reset output stays low for at least 180 ms after the monitored voltage rises above the 3.5V threshold, giving the system time to stabilize.

Is BD45352G-TR compatible with 3.3V logic?

Yes. The open-drain output requires an external pull-up resistor to the logic supply voltage — typically 3.3V or 5V. The output is active-low, so it pulls low when the monitored voltage drops below 3.5V, which is a standard reset signal for 3.3V logic.