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SGM811B-RXKA4G

Public Made by Adom

by adom

SGMICRO Supervisor And Reset ICs, SOT-143. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SGM811B-RXKA4G

SGMICRO · Supervisor And Reset ICs · SOT-143

SGM811B-RXKA4G from SGMICRO, in a SOT-143. 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.
2 nRESET output Active-low reset output: if VCC falls below the reset threshold or nMR is low, nRESET keeps low, and if VCC exceeds the reset threshold it keeps low for 200ms (TYP).
3 nMR input Manual reset input, active-low, with an internal pull-up resistor of 59kΩ (40kΩ min, 81kΩ max); it can be driven by CMOS logic or a switch to GND, and if unused it may be left open or tied to VCC.
4 VCC power_in Supply voltage pin; operating voltage range is 1.0V to 5.5V.

Key specifications

Parameter Value
Manufacturer SGMICRO
Package SOT-143
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 Threshold (R Model) at TJ = +25℃ VRST 2.59 2.63 2.67 V R Model, TJ = +25℃ 4
Reset Threshold (R Model) over temperature VRST 2.58 2.68 V R Model, TJ = -40℃ to +125℃ 4
Reset Pulse Width tRS 140 200 290 ms 4
Operating Voltage Range VCC 1 5.5 V 4
Supply Current ISUPPLY 0.5 1 μA VCC = 3.6V 4
Supply Current ISUPPLY 0.6 1.4 μA VCC = 5.5V 4
Pull-Up Resistance (nMR) 40 59 81 kΩ 4
nRESET Output Voltage Low (SGM811B) VOL 0.4 V VCC = VRST(MIN), ISINK = 1.2mA 4
nRESET Output Voltage Low (SGM811B) VOL 0.3 V VCC > 1.0V, ISINK = 50μA 4
Reset Threshold Hysteresis (R Model) 12 mV R Model 4
Reset Threshold Temperature Coefficient 20 ppm/℃ TJ = -40℃ to +125℃ 4
VCC to Reset Delay tRD 84 μs VRST - VCC = 100mV 4
Manual Reset Minimum Pulse Width 300 ns 4
Manual Reset Glitch Immunity 130 ns 4
Manual Reset Propagation Delay 400 ns 4
VCC Supply Voltage VCC -0.3 6 V 2
Package Thermal Resistance, Junction-to-Ambient θJA 337 ℃/W SOT-143 2
Junction Temperature TJ 150 ℃ 2
Storage Temperature Range TSTG -65 150 ℃ 2
Lead Temperature 260 ℃ Soldering, 10s 2
Operating Junction Temperature Range TJ -40 125 ℃ 2

CAD (KiCad official)

  • Symbol: SGM811B-RXKA4G
  • Footprint: Package_TO_SOT_SMD:SOT-143
  • 3D model: SOT-143 (KiCad packages3D, STEP)
  • 3D model files: sgm811b-rxka4g-etched.step / sgm811b-rxka4g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sgm811b-rxka4g.step / sgm811b-rxka4g.glb are the bare package body.

Provenance

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

  • Datasheet: SGMICRO datasheet (10 pp, sha256 57107897e6ffd394, 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