DS1818R-20+T&R

@@ -0,0 +1,44 @@+# DS1818R-20+T&R++**Analog Devices Inc Maxim Integrated** · Supervisor And Reset ICs · SOT-23-3++DS1818R-20+T&R from Analog Devices Inc Maxim Integrated, in a SOT-23-3. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | RST | bidirectional | Active-low reset output. Open-drain with internal 5.5 kΩ (typ) pullup to VCC (RP: 3.50-7.5 kΩ). Asserted low when VCC drops below VCCTP (2.47-2.64 V for the -20 variant) and held low for ~150 ms after VCC returns to tolerance. Also monitors an external pushbutton: pulling RST low for ≥1 µs (tPB) triggers a 150 ms pushbutton reset (tPBRST). IOL ≥ +10 mA at 0.4 V; VIL ≤ 0.4 V, VIH ≥ 0.7*VCC. |+| 2 | VCC | power_in | Power supply input. Recommended operating range 1.0 V to 5.5 V; monitored for out-of-tolerance conditions against the 3.3 V nominal threshold (VCCTP typ 2.55 V for the -20 / 20% variant). Quiescent current ICC = 28 µA typ, 35 µA max (with RST open). Absolute max: -0.5 V to +7.0 V. |+| 3 | GND | power_in | Device ground reference. All voltages are referenced to this pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Analog Devices Inc Maxim Integrated |+| Package | SOT-23-3 |+| Category | Power Management (PMIC) |+| Pins | 3 |++## Ordering variants++Same part, different packaging or reel option.++- `DS1818R-20+T&RR`++## CAD (KiCad official)++- Symbol: `DS1818R-20+T&R`+- Footprint: `Package_TO_SOT_SMD:SOT-23-3`+- 3D model: SOT-23-3 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Analog Devices Inc Maxim Integrated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588939985521557504) (None pp, sha256 `36fe757a06dc06e4`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/ds1818r-20-t-r-datasheet.pdf)

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