component
UM805RE
Public Made by Adomby adom
Union Semiconductor Supervisor And Reset ICs, SOT-143-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
UM805RE
Union Semiconductor · Supervisor And Reset ICs · SOT-143-4
UM805RE from Union Semiconductor, in a SOT-143-4. 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 | GND | power_in | Ground reference. |
| 2 | RESET | tri_state | Open-drain active-low output that remains low while VCC is below 2.63V or MR is held low, continues low for at least 140ms after reset conditions terminate, and requires external pull-up resistor to any supply up to 6V. |
| 3 | MR | input | Active-low manual reset input with internal 20kΩ pull-up resistor; asserts reset when held low and maintains reset for 240ms after returning high. |
| 4 | VCC | power_in | Supply voltage input rated for 1.0V to 5.5V operation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Union Semiconductor |
| Package | SOT-143-4 |
| Category | Power Management (PMIC) |
| Pins | 4 |
CAD (KiCad official)
- Symbol:
UM805RE - Footprint:
Package_TO_SOT_SMD:SOT-143 - 3D model: SOT-143-4 (KiCad packages3D, STEP)
- 3D model files:
um805re-etched.step/um805re-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);um805re.step/um805re.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Union Semiconductor datasheet (14 pp, sha256
2765d38a175c536c, retrieved 2026-09-18, 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).
# UM805RE
**Union Semiconductor** · Supervisor And Reset ICs · SOT-143-4
UM805RE from Union Semiconductor, in a SOT-143-4. 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 | GND | power_in | Ground reference. |
| 2 | RESET | tri_state | Open-drain active-low output that remains low while VCC is below 2.63V or MR is held low, continues low for at least 140ms after reset conditions terminate, and requires external pull-up resistor to any supply up to 6V. |
| 3 | MR | input | Active-low manual reset input with internal 20kΩ pull-up resistor; asserts reset when held low and maintains reset for 240ms after returning high. |
| 4 | VCC | power_in | Supply voltage input rated for 1.0V to 5.5V operation. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Union Semiconductor |
| Package | SOT-143-4 |
| Category | Power Management (PMIC) |
| Pins | 4 |
## CAD (KiCad official)
- Symbol: `UM805RE`
- Footprint: `Package_TO_SOT_SMD:SOT-143`
- 3D model: SOT-143-4 (KiCad packages3D, STEP)
- 3D model files: `um805re-etched.step` / `um805re-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `um805re.step` / `um805re.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Union Semiconductor datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588949512392359936) (14 pp, sha256 `2765d38a175c536c`, retrieved 2026-09-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-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).
[Datasheet PDF](docs/um805re-datasheet.pdf)