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UM810MS
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Union Semiconductor Supervisor And Reset ICs, SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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UM810MS
Union Semiconductor · Supervisor And Reset ICs · SOT-23-3
UM810MS from Union Semiconductor, in a SOT-23-3. 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 for the supervisor circuit. |
| 2 | RESET | output | Push-pull active-high reset output on the UM810; asserted within 10µs of VCC falling below the reset threshold and held for a minimum of 140ms (240ms typ) after VCC rises above it. |
| 3 | VCC | power_in | Supply voltage input and monitored voltage, 1.0V to 10V operating range (absolute maximum -0.3 to +10V), with the reset output guaranteed in the correct logic state down to VCC=1V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Union Semiconductor |
| Package | SOT-23-3 |
| Category | Power Management (PMIC) |
| Pins | 3 |
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 | VCC | 1 | 10 | V | TA=0°C to +70°C | 3 | |
| Supply Voltage Range | VCC | 1.2 | 10 | V | TA=-40°C to +85°C | 3 | |
| Supply Current | ICC | 3 | 5 | μA | VCC<5.5V, UM8_L/M/J | 3 | |
| Reset Threshold UM8_M | VTH | 4.29 | 4.38 | 4.51 | V | TA=+25°C | 3 |
| Reset Threshold UM8_M | VTH | 4.25 | 4.55 | V | TA=-40°C to +85°C | 3 | |
| Reset Threshold Tempco | 30 | ppm/°C | 3 | ||||
| VCC to Reset Delay | 10 | μs | VCC=VTH to (VTH-100mV) | 3 | |||
| Reset Active Timeout Period | 140 | 240 | 360 | ms | TA=-40°C to +85°C | 3 | |
| RESET Output Voltage Low (UM810) | VOL | 0.4 | V | VCC=VTH max, ISINK=3.2mA, UM810J/L/M | 3 | ||
| Supply Voltage | VCC | -0.3 | 10 | V | 2 | ||
| RESET Output Voltage (Push-Pull) | -0.3 | V | upper limit VCC+0.3 | 2 | |||
| Input Current, VCC | ICC | 20 | mA | 2 | |||
| Output Current, RESET | IO | 20 | mA | 2 | |||
| Rate of Rise, VCC | 100 | V/μs | 2 | ||||
| Continuous Power Dissipation | PD | 320 | mW | SOT23-3 | 2 | ||
| Operating Junction Temperature | TJ | -40 | 85 | °C | 2 | ||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 2 | ||
| Lead Temperature | 300 | °C | Soldering, 10s | 2 |
CAD (KiCad official)
- Symbol:
UM810MS - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
um810ms-etched.step/um810ms-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);um810ms.step/um810ms.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Union Semiconductor datasheet (14 pp, sha256
a8ef262a39510d83, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).
# UM810MS
**Union Semiconductor** · Supervisor And Reset ICs · SOT-23-3
UM810MS from Union Semiconductor, in a SOT-23-3. 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 for the supervisor circuit. |
| 2 | RESET | output | Push-pull active-high reset output on the UM810; asserted within 10µs of VCC falling below the reset threshold and held for a minimum of 140ms (240ms typ) after VCC rises above it. |
| 3 | VCC | power_in | Supply voltage input and monitored voltage, 1.0V to 10V operating range (absolute maximum -0.3 to +10V), with the reset output guaranteed in the correct logic state down to VCC=1V. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Union Semiconductor |
| Package | SOT-23-3 |
| Category | Power Management (PMIC) |
| Pins | 3 |
## 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 | VCC | 1 | | 10 | V | TA=0°C to +70°C | 3 |
| Supply Voltage Range | VCC | 1.2 | | 10 | V | TA=-40°C to +85°C | 3 |
| Supply Current | ICC | | 3 | 5 | μA | VCC<5.5V, UM8_L/M/J | 3 |
| Reset Threshold UM8_M | VTH | 4.29 | 4.38 | 4.51 | V | TA=+25°C | 3 |
| Reset Threshold UM8_M | VTH | 4.25 | | 4.55 | V | TA=-40°C to +85°C | 3 |
| Reset Threshold Tempco | | | 30 | | ppm/°C | | 3 |
| VCC to Reset Delay | | | | 10 | μs | VCC=VTH to (VTH-100mV) | 3 |
| Reset Active Timeout Period | | 140 | 240 | 360 | ms | TA=-40°C to +85°C | 3 |
| RESET Output Voltage Low (UM810) | VOL | | | 0.4 | V | VCC=VTH max, ISINK=3.2mA, UM810J/L/M | 3 |
| Supply Voltage | VCC | -0.3 | | 10 | V | | 2 |
| RESET Output Voltage (Push-Pull) | | -0.3 | | | V | upper limit VCC+0.3 | 2 |
| Input Current, VCC | ICC | | | 20 | mA | | 2 |
| Output Current, RESET | IO | | | 20 | mA | | 2 |
| Rate of Rise, VCC | | | | 100 | V/μs | | 2 |
| Continuous Power Dissipation | PD | | | 320 | mW | SOT23-3 | 2 |
| Operating Junction Temperature | TJ | -40 | | 85 | °C | | 2 |
| Storage Temperature Range | TSTG | -65 | | 150 | °C | | 2 |
| Lead Temperature | | | | 300 | °C | Soldering, 10s | 2 |
## CAD (KiCad official)
- Symbol: `UM810MS`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `um810ms-etched.step` / `um810ms-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `um810ms.step` / `um810ms.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Union Semiconductor datasheet](docs/um810ms-datasheet.pdf) (14 pp, sha256 `a8ef262a39510d83`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/um810ms-datasheet.pdf)