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CBM811ZST4

Public Made by Adom

by adom

Corebai Microelectronics Monitors & Reset Circuits, SOT-143-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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CBM811ZST4

Corebai Microelectronics · Monitors & Reset Circuits · SOT-143-4

CBM811ZST4 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 Ground, 0 V supply reference.
2 RESET output Active-low logic reset output (CBM811 variant); stays asserted low down to VCC = 1 V and is held active for about 240 ms (typ) after VCC rises above the reset threshold.
3 MR input Debounced manual reset input; signals shorter than 100 ns are ignored and inputs longer than 10 µs trigger a reset, with an internal pull-up of 10 to 30 kΩ.
4 VCC power_in Monitored supply voltage input (2.5 V, 3 V, 3.3 V or 5 V systems); absolute maximum -0.3 V to +6 V, with a 2.32 V reset threshold for the CBM811Z.

Key specifications

Parameter Value
Manufacturer Corebai Microelectronics
Package SOT-143-4
Category Power Supply Chip
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 VCC 1 5.5 V 5
Supply current 8 15 μA 5
Reset threshold (CBM811Z) 2.28 2.32 2.35 V TA = −40°C to +85°C 5
Reset threshold (CBM811Z), wide limit 2.25 2.38 V TA = −40°C to +85°C 5
Manual reset pull-up resistance 10 20 30 kΩ 5
Manual reset minimum pulse width 10 μs 5
Manual reset glitch immunity 100 ns 5
Manual reset to reset propagation delay 0.5 μs 5
MR input high threshold 0.7 V Input greater than 0.7VCC (printed as 0.7VCC V) 5
VCC terminal voltage VCC -0.3 6 V relative to GND 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; derate 4 mW/°C above 70°C 4
Operating temperature range -40 85 °C 4
Storage temperature range -65 160 °C 4
Lead temperature (soldering, 10 s) 300 °C 10 seconds 4
ESD rating 3 kV 4
Thermal resistance junction to ambient θJA 330 °C/W SOT-143 4

CAD (KiCad official)

  • Symbol: CBM811ZST4
  • Footprint: Package_TO_SOT_SMD:SOT-143
  • 3D model: SOT-143-4 (KiCad packages3D, STEP)
  • 3D model files: cbm811zst4-etched.step / cbm811zst4-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cbm811zst4.step / cbm811zst4.glb are the bare package body.

Provenance

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

  • Datasheet: Corebai Microelectronics datasheet (10 pp, sha256 eca50a375d8a7fde, retrieved 2026-10-23, 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-sonnet-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