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Analog Devices MAX6389XS44D3 — Power Management (PMIC / Gate Driver)

MAX6389XS44D3 Multi-Voltage Supervisor, 4.38V Threshold

MPNMAX6389XS44D3
End of Life

Maxim Integrated MAX6389XS44D3 multi-voltage supervisor, 2-channel, active low reset, open-drain output, 4.38V fixed threshold plus adjustable second channel, 140ms minimum reset timeout, SC-70-4 package, -40°C to 125°C.

$2.74Ref. price · indicative, final on quote
Analog Devices MAX6389XS44D3 datasheet (PDF)
PackagingSC-82A, SOT-343
RoHSRoHS non-compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MAX6389XS44D3 specifications
ParameterValue
TypeMulti-Voltage Supervisor
MountingSurface Mount
Voltage - threshold4.38V, Adj
Number of voltages monitored2
Operating temperature-40°C ~ 125°C (TA)
ResetActive Low
OutputOpen Drain or Open Collector
PackageBulk
Reset timeout140ms Minimum
CaseSC-82A, SOT-343

Product details

Two-rail supervisor in a four-pin SC-70

Reset timeout is a minimum of 140ms, long enough to cover most MCU/FPGA boot sequences without external timing components. The open-drain output lets the reset line be shared across multiple supervisors or pulled up to a different voltage than the monitored rails.

Housed in a 4-pin SC-70 (SOT-343) package, it occupies minimal board area.

Note the RoHS non-compliant marking — this is the legacy tin-lead finish version. If your assembly line is RoHS-exempt (military, aerospace, or medical with exemption 7a), this is the correct variant. For standard RoHS builds, verify the lead-free suffix (e.g., MAX6389XS44D3+T) is the intended order code.

Frequently asked questions

What is the output type of the MAX6389XS44D3 — open-drain or push-pull?

The reset output is open-drain (open collector). This allows the reset line to be pulled up to any voltage up to the absolute maximum rating, enabling level translation between the monitored rail and the processor reset input.

Is the MAX6389XS44D3 RoHS compliant?

No, the MAX6389XS44D3 is listed as RoHS non-compliant. It uses a tin-lead (SnPb) finish. For RoHS-compliant builds, check the lead-free suffix variant (e.g., MAX6389XS44D3+T).

What is the reset timeout on the MAX6389XS44D3?

The reset timeout is 140ms minimum. This is the duration the reset output stays asserted after all monitored voltages rise above their thresholds.