Supervisor IC in a SOT-23-5 footprint
The STM6321MWY6F: Housed in a 5-pin SOT-23-5 (SC-74A) surface-mount package, it fits tightly on space-constrained boards where a single supervisor IC replaces discrete reset circuitry.
STM6321MWY6F STMicro Supervisor, 4.39V Threshold, SOT-23-5
MPNSTM6321MWY6F
End of Life
STMicroelectronics STM6321MWY6F Simple Reset/Power-On Reset IC, 4.39V Threshold, Active High/Active Low, Open Drain/Push-Pull Output, 140ms Min Reset Timeout, SOT-23-5 Package.
$1.96Ref. price · indicative, final on quote
PackagingSC-74A, SOT-753
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Type | Simple Reset/Power-On Reset |
| Mounting | Surface Mount |
| Voltage - threshold | 4.39V |
| Number of voltages monitored | 1 |
| Operating temperature | -40°C ~ 85°C (TA) |
| Reset | Active High/Active Low |
| Output | Open Drain, Push-Pull |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Reset timeout | 140ms Minimum |
| Case | SC-74A, SOT-753 |
Product details
Frequently asked questions
What does the 4.39V threshold mean for my design?
The 4.39V threshold is the voltage at which the supervisor asserts reset when the monitored rail falls below this level. For a 5V supply rail, a 4.39V threshold provides a typical undervoltage detection window of about 12% below nominal, catching dips before the logic becomes unreliable.