component
STM6821MWY6F
Public Made by Adomby adom
STMicroelectronics Supervisor And Reset ICs, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSTM6821MWY6F
STMicroelectronics · Supervisor And Reset ICs · SOT-23-5
STM6821MWY6F from STMicroelectronics, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | RST | output | Active-high push-pull reset output (inverse of RST); asserted high whenever VCC falls below VRST (4.270-4.490 V for M-grade), watchdog timeout occurs, or MR is logic low; VOH ≥ 0.8 VCC with ISOURCE up to 800 µA (VCC ≥ 4.25 V); remains asserted for trec (140-280 ms, typ. 200 ms) after fault clears. |
| 2 | VSS | power_in | Ground (0 V supply return). |
| 3 | MR | input | Active-low manual/push-button reset input with internal 52 kΩ (typ.) pull-up resistor; a logic low asserts the reset output and holds it for trec after MR returns high; VIL < 0.3 VCC (VRST < 4.0 V); minimum pulse width 1 µs; may be left open if unused. |
| 4 | WDI | input | Watchdog input; if held static (high or low) for ≥ tWD (typ. 1.6 s, range 1.12-2.24 s) the watchdog timer expires and reset is asserted; timer clears on any rising or falling edge or while reset is asserted; WDI = VCC draws up to 160 µA (time-average); float or tristate to disable watchdog (max leakage 10 µA, max load capacitance 200 pF). |
| 5 | VCC | power_in | Supply voltage, 1.0 to 5.5 V operating range; quiescent ICC 4 µA typ. / 12 µA max (MR and WDI unconnected, VCC < 3.6 V); reset output guaranteed valid down to VCC = 1.0 V (TA = 0 to 85 °C). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |
CAD (KiCad official)
- Symbol:
STM6821MWY6F - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
stm6821mwy6f-etched.step/stm6821mwy6f-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);stm6821mwy6f.step/stm6821mwy6f.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (31 pp, sha256
ba50f0fd6706f830, retrieved 2026-09-27, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).