component
RT9818B-18GV
Public Made by Adomby adom
Richtek Tech Supervisor And Reset ICs, SOT-23-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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RT9818B-18GV
Richtek Tech · Supervisor And Reset ICs · SOT-23-3L
RT9818B-18GV from Richtek Tech, in a SOT-23-3L. 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 pin for the voltage detector. |
| 2 | RESET/ | output | Active-low open-drain reset output; the datasheet's typical application uses a 100kΩ pull-up, for which VOL is less than 0.2V. |
| 3 | VDD | power_in | Monitored supply pin; the operating VDD range is 0.9V to 6V and the reset is asserted when VDD falls below the threshold. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Richtek Tech |
| Package | SOT-23-3L |
| 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 |
|---|---|---|---|---|---|---|---|
| Operating VDD (VOUT) Range | VDD | 0.9 | 6 | V | 3 | ||
| Supply Current | IDD | 3 | 8 | μA | VTH = 3V, VDD = 4.5V, TA = 27C | 3 | |
| Threshold Voltage Accuracy | VTH | -1.5 | 1.5 | % | TA = 27C | 3 | |
| VDD Drop to Reset Delay | tRD | 20 | μs | Drop = VTH 125mV | 3 | ||
| Reset Active Time Out Period (RT9818B/F) | tRP | 35 | 55 | 75 | ms | VDD 1.02 x VTH | 3 |
| RESET Output Voltage Low | VOL | 0.4 | V | VDD < VTH, ISINK > 3.5mA (Note 5) | 3 | ||
| Junction Temperature Range | -40 | 125 | °C | 3 | |||
| Ambient Temperature Range | -40 | 85 | °C | 3 | |||
| Terminal Voltage (with Respect to GND) VDD | VDD | -0.3 | 6 | V | 3 | ||
| All Other Inputs | -0.3 | 6 | V | 3 | |||
| Input Current | IVDD | 20 | mA | 3 | |||
| Power Dissipation SOT-23-3 | PD | 0.4 | W | TA = 25°C | 3 | ||
| Lead Temperature (Soldering, 10 sec) | 260 | °C | 10 sec | 3 | |||
| Storage Temperature Range | -65 | 150 | °C | 3 | |||
| ESD Susceptibility HBM | 2 | kV | HBM (Human Body Model) | 3 | |||
| Package Thermal Resistance SOT-23-3 | θJA | 250 | °C/W | TA = 25°C, JEDEC 51-3 (Note 2) | 3 |
CAD (KiCad official)
- Symbol:
RT9818B-18GV - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files:
rt9818b-18gv-etched.step/rt9818b-18gv-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rt9818b-18gv.step/rt9818b-18gv.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Richtek Tech datasheet (14 pp, sha256
f01cb2fba9eeeacd, 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).
# RT9818B-18GV
**Richtek Tech** · Supervisor And Reset ICs · SOT-23-3L
RT9818B-18GV from Richtek Tech, in a SOT-23-3L. 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 pin for the voltage detector. |
| 2 | RESET/ | output | Active-low open-drain reset output; the datasheet's typical application uses a 100kΩ pull-up, for which VOL is less than 0.2V. |
| 3 | VDD | power_in | Monitored supply pin; the operating VDD range is 0.9V to 6V and the reset is asserted when VDD falls below the threshold. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Richtek Tech |
| Package | SOT-23-3L |
| 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 |
|---|---|---|---|---|---|---|---|
| Operating VDD (VOUT) Range | VDD | 0.9 | | 6 | V | | 3 |
| Supply Current | IDD | | 3 | 8 | μA | VTH = 3V, VDD = 4.5V, TA = 27C | 3 |
| Threshold Voltage Accuracy | VTH | -1.5 | | 1.5 | % | TA = 27C | 3 |
| VDD Drop to Reset Delay | tRD | | 20 | | μs | Drop = VTH 125mV | 3 |
| Reset Active Time Out Period (RT9818B/F) | tRP | 35 | 55 | 75 | ms | VDD 1.02 x VTH | 3 |
| RESET Output Voltage Low | VOL | | | 0.4 | V | VDD < VTH, ISINK > 3.5mA (Note 5) | 3 |
| Junction Temperature Range | | -40 | | 125 | °C | | 3 |
| Ambient Temperature Range | | -40 | | 85 | °C | | 3 |
| Terminal Voltage (with Respect to GND) VDD | VDD | -0.3 | | 6 | V | | 3 |
| All Other Inputs | | -0.3 | | 6 | V | | 3 |
| Input Current | IVDD | | | 20 | mA | | 3 |
| Power Dissipation SOT-23-3 | PD | | | 0.4 | W | TA = 25°C | 3 |
| Lead Temperature (Soldering, 10 sec) | | | | 260 | °C | 10 sec | 3 |
| Storage Temperature Range | | -65 | | 150 | °C | | 3 |
| ESD Susceptibility HBM | | | | 2 | kV | HBM (Human Body Model) | 3 |
| Package Thermal Resistance SOT-23-3 | θJA | | | 250 | °C/W | TA = 25°C, JEDEC 51-3 (Note 2) | 3 |
## CAD (KiCad official)
- Symbol: `RT9818B-18GV`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `rt9818b-18gv-etched.step` / `rt9818b-18gv-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rt9818b-18gv.step` / `rt9818b-18gv.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Richtek Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590234293726445568) (14 pp, sha256 `f01cb2fba9eeeacd`, 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/rt9818b-18gv-datasheet.pdf)