# CBM809ZST3

**Corebai Microelectronics** · Supervisor And Reset ICs · SOT-23-3

CBM809ZST3 from Corebai Microelectronics, 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; all signals are referenced to ground (0 V). |
| 2 | RESET | output | Active-low push-pull reset output for the CBM809 series, asserted while VCC is below the reset threshold (2.32 V typ for the CBM809Z) and held for 240 ms typical after VCC rises above it; VOL is at most 0.3 V at 1.2 mA sink and VOH is at least 0.8 VCC at 500 µA source for the Z version. |
| 3 | VCC | power_in | Supply voltage being monitored; operating range is 1.0 V to 5.5 V, with absolute maximum of -0.3 V to +6 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Corebai Microelectronics |
| 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 |  | 5.5 | V |  | 4 |
| Supply current |  |  | 17 | 30 | μA | VCC < 3.6V, CBM8XXR/S/T/Z | 4 |
| Reset threshold (CBM809Z) | VRST | 2.28 | 2.32 | 2.35 | V | CBM803Z/CBM809Z/CBM810Z | 4 |
| Reset pulse width |  | 140 | 240 | 460 | ms |  | 4 |
| RESET output low voltage (CBM809Z) | VOL |  |  | 0.3 | V | VCC = VTH min, ISINK = 1.2 mA, CBM803R/S/T/Z, CBM809R/S/T/Z | 4 |
| RESET output low voltage (CBM809X, general row) | VOL |  |  | 0.3 | V | VCC > 1.0 V, ISINK = 50 μA | 4 |
| RESET output high voltage (CBM809Z) | VOH | 0.8 |  |  | V | VCC > VTH max, ISOURCE = 500 μA, CBM809R/S/T/Z | 4 |
| Supply voltage (absolute maximum) | VCC | -0.3 |  | 6 | V | TA = 25°C | 5 |
| RESET, RESET (push-pull) voltage |  | -0.3 |  |  | V | upper limit printed as VCC+0.5 V | 5 |
| Input current (VCC) |  |  |  | 20 | mA |  | 5 |
| Output current (RESET, RESET) |  |  |  | 20 | mA |  | 5 |
| Rise rate VCC |  |  |  | 100 | V/μs |  | 5 |
| Thermal resistance junction-to-ambient | θJA |  | 270 |  | °C/W | SOT-23 package | 5 |
| Pin temperature (soldering) |  |  |  | 300 | ℃ | 10 s | 5 |
| Vapor phase soldering |  |  |  | 215 | ℃ | 60 s | 5 |
| Infrared soldering |  |  |  | 220 | ℃ | 15 s | 5 |
| Storage temperature range |  | -65 |  | 150 | ℃ |  | 5 |
| Operating temperature range | TA | -40 |  | 85 | ℃ | ordering table temperature range for CBM809ZST3 | 12 |

## CAD (KiCad official)

- Symbol: `CBM809ZST3`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `cbm809zst3-etched.step` / `cbm809zst3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cbm809zst3.step` / `cbm809zst3.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Corebai Microelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590916583906750464) (13 pp, sha256 `6766996f159d4112`, retrieved 2026-10-18, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/cbm809zst3-datasheet.pdf)