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CBM811TST4
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Corebai Microelectronics Supervisor And Reset ICs, SOT-143-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownCBM811TST4
Corebai Microelectronics · Supervisor And Reset ICs · SOT-143-4
CBM811TST4 from Corebai Microelectronics, 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 | Power supply ground, 0 V reference for the device. |
| 2 | RESET | output | Active-low reset output for the CBM811 (the CBM812 uses an active-high RESET on this pin); it stays asserted while VCC is below the reset threshold and for 240 ms typical after VCC rises above it, and remains valid down to VCC = 1 V. |
| 3 | MR | input | Manual reset input with debounce: inputs shorter than 100 ns are ignored, inputs longer than 10 µs trigger reset, and the input has an internal pull-up of 10 to 30 kΩ (20 kΩ typical). |
| 4 | VCC | power_in | Monitored supply voltage input (2.5 V, 3 V, 3.3 V or 5 V as printed on the pin table); the absolute maximum rating is −0.3 V to +6 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Corebai Microelectronics |
| 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 |
|---|---|---|---|---|---|---|---|
| Reset voltage threshold (CBM811T/812T, 3.08 V variant) | 3.03 | 3.08 | 3.14 | V | TA = −40°C to +85°C | 5 | |
| Reset voltage threshold (CBM811T/812T, 3.08 V variant, wide-limit row) | 3 | 3.15 | V | TA = −40°C to +85°C | 5 | ||
| Supply voltage | 1 | 5.5 | V | 5 | |||
| Supply current | 8 | 15 | μA | 5 | |||
| Manual reset minimum pulse width | 10 | μs | 5 | ||||
| Manual reset glitch immunity (signals below this are ignored) | 100 | ns | 5 | ||||
| Manual reset transmission delay to reset | 0.5 | μs | 5 | ||||
| Manual reset internal pull-up resistor | 10 | 20 | 30 | kΩ | 5 | ||
| Manual reset input high voltage (fixed) | 2.3 | V | 5 | ||||
| Manual reset input low voltage (fixed) | 0.8 | V | 5 | ||||
| Manual reset input high threshold (VCC-relative) | 0.7 | *VCC | 5 | ||||
| Manual reset input low threshold (VCC-relative) | 0.25 | *VCC | 5 | ||||
| Power-on reset timeout (minimum) | 140 | ms | 1 | ||||
| Reset timeout after VCC rises above threshold | 240 | ms | VCC above reset threshold | 8 | |||
| VCC supply voltage (absolute maximum) | -0.3 | 6 | V | relative to GND | 4 | ||
| Input voltage range (MR) | -0.3 | V | maximum is VCC + 0.3 V | 4 | |||
| VCC input current | 20 | mA | 4 | ||||
| MR input current | 20 | mA | 4 | ||||
| RESET output current | 20 | mA | 4 | ||||
| Power dissipation (SOT-143) | 200 | mW | TA = 70°C | 4 | |||
| Operating temperature range | -40 | 85 | °C | 10 | |||
| Storage temperature range | -65 | 160 | °C | 4 | |||
| Lead temperature (soldering, 10 s) | 300 | °C | 10 s | 4 | |||
| Vapor phase reflow temperature | 215 | °C | 60 s | 4 | |||
| Infrared reflow temperature | 220 | °C | 15 s | 4 | |||
| ESD rating | 3 | kV | 4 | ||||
| Thermal resistance junction-to-ambient (θJA) | θJA | 330 | °C/W | 4 |
CAD (KiCad official)
- Symbol:
CBM811TST4 - Footprint:
Package_TO_SOT_SMD:SOT-143 - 3D model: SOT-143-4 (KiCad packages3D, STEP)
- 3D model files:
cbm811tst4-etched.step/cbm811tst4-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cbm811tst4.step/cbm811tst4.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Corebai Microelectronics datasheet (10 pp, sha256
4552d360b50c8779, retrieved 2026-10-20, 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, 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).