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UM811TE
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Union Semiconductor Supervisor And Reset ICs, SOT-143-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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UM811TE
Union Semiconductor · Supervisor And Reset ICs · SOT-143-4
UM811TE from Union Semiconductor, in a SOT-143-4. 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 | GND | power_in | Ground reference pin for the supervisor. |
| 2 | RESET | output | For the UM811TE this is an active-low, CMOS push-pull output that sources and sinks current; it stays low while VCC is below the reset threshold or while MR is low, and for the reset active timeout period (tRP, 140 to 240 ms) after those conditions end. |
| 3 | MR | input | Active-low manual reset input with an internal 20 kΩ pull-up (10 to 30 kΩ); a logic low asserts reset, the TE-version input thresholds are VIH 0.7×VCC and VIL 0.25×VCC, and it may be left open when unused. |
| 4 | VCC | power_in | Supply voltage input for +5 V, +3.3 V or +3 V systems; the absolute maximum rating is -0.3 V to +6.0 V and the operating supply range is 1.0 V to 5.5 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Union Semiconductor |
| Package | SOT-143-4 |
| Category | Power Management (PMIC) |
| Pins | 4 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage Range (TA=0°C to +70°C) | VCC | 1 | 5.5 | V | TA=0°C to +70°C | 4 | |
| Supply Current | ICC | 2 | 5 | μA | 4 | ||
| Reset Threshold, T Version | VTH+ | 3.04 | 3.08 | 3.11 | V | T Version, TA=+25°C | 4 |
| Reset Threshold, T Version | VTH+ | 3 | 3.15 | V | T Version, TA=-40°C to +85°C | 4 | |
| Reset Active Timeout Period | tRP | 140 | 240 | 560 | ms | 4 | |
| MR Pull-Up Resistance | 10 | 20 | 30 | kΩ | 4 | ||
| RESET Output Voltage Low | VOL | 0.3 | V | ISINK=1.2mA, VCC=VTH(MIN), UM805/811TE/SE/RE/ZE | 5 | ||
| Supply Voltage (absolute maximum) | VCC | -0.3 | 6 | V | 3 | ||
| Input Current, VCC, MR | ICC | 20 | mA | 3 | |||
| Output Current, RESET, RESET | IO | 20 | mA | 3 | |||
| Continuous Power Dissipation | PD | 320 | mW | Derate 4mW/°C above 70°C | 3 | ||
| Operating Temperature Range | TA | -40 | 105 | °C | 3 | ||
| Storage Temperature Range | TSTG | -65 | 160 | °C | 3 | ||
| Lead Temperature | 300 | °C | Soldering, 10s | 3 |
CAD (KiCad official)
- Symbol:
UM811TE - Footprint:
Package_TO_SOT_SMD:SOT-143 - 3D model: SOT-143-4 (KiCad packages3D, STEP)
- 3D model files:
um811te-etched.step/um811te-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);um811te.step/um811te.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 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(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).
# UM811TE
**Union Semiconductor** · Supervisor And Reset ICs · SOT-143-4
UM811TE from Union Semiconductor, in a SOT-143-4. 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 | GND | power_in | Ground reference pin for the supervisor. |
| 2 | RESET | output | For the UM811TE this is an active-low, CMOS push-pull output that sources and sinks current; it stays low while VCC is below the reset threshold or while MR is low, and for the reset active timeout period (tRP, 140 to 240 ms) after those conditions end. |
| 3 | MR | input | Active-low manual reset input with an internal 20 kΩ pull-up (10 to 30 kΩ); a logic low asserts reset, the TE-version input thresholds are VIH 0.7×VCC and VIL 0.25×VCC, and it may be left open when unused. |
| 4 | VCC | power_in | Supply voltage input for +5 V, +3.3 V or +3 V systems; the absolute maximum rating is -0.3 V to +6.0 V and the operating supply range is 1.0 V to 5.5 V. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Union Semiconductor |
| Package | SOT-143-4 |
| Category | Power Management (PMIC) |
| Pins | 4 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage Range (TA=0°C to +70°C) | VCC | 1 | | 5.5 | V | TA=0°C to +70°C | 4 |
| Supply Current | ICC | | 2 | 5 | μA | | 4 |
| Reset Threshold, T Version | VTH+ | 3.04 | 3.08 | 3.11 | V | T Version, TA=+25°C | 4 |
| Reset Threshold, T Version | VTH+ | 3 | | 3.15 | V | T Version, TA=-40°C to +85°C | 4 |
| Reset Active Timeout Period | tRP | 140 | 240 | 560 | ms | | 4 |
| MR Pull-Up Resistance | | 10 | 20 | 30 | kΩ | | 4 |
| RESET Output Voltage Low | VOL | | | 0.3 | V | ISINK=1.2mA, VCC=VTH(MIN), UM805/811TE/SE/RE/ZE | 5 |
| Supply Voltage (absolute maximum) | VCC | -0.3 | | 6 | V | | 3 |
| Input Current, VCC, MR | ICC | | | 20 | mA | | 3 |
| Output Current, RESET, RESET | IO | | | 20 | mA | | 3 |
| Continuous Power Dissipation | PD | | | 320 | mW | Derate 4mW/°C above 70°C | 3 |
| Operating Temperature Range | TA | -40 | | 105 | °C | | 3 |
| Storage Temperature Range | TSTG | -65 | | 160 | °C | | 3 |
| Lead Temperature | | | | 300 | °C | Soldering, 10s | 3 |
## CAD (KiCad official)
- Symbol: `UM811TE`
- Footprint: `Package_TO_SOT_SMD:SOT-143`
- 3D model: SOT-143-4 (KiCad packages3D, STEP)
- 3D model files: `um811te-etched.step` / `um811te-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `um811te.step` / `um811te.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/8588944085948780544) (14 pp, sha256 `2765d38a175c536c`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (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/um811te-datasheet.pdf)