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LM4040CEM3X-5.0

Public Made by Adom

by adom

Texas Instruments Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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docs lm4040cem3x-5-0: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
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lm4040cem3x-5-0-etched.glb lm4040cem3x-5-0: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
lm4040cem3x-5-0-etched.step lm4040cem3x-5-0: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
lm4040cem3x-5-0.glb Publish 0.1.0 · Ray 4d ago
lm4040cem3x-5-0.kicad_mod Publish 0.1.0 · Ray 4d ago
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README.md Initial commit: component/lm4040cem3x-5-0 · Ray 4d ago

LM4040CEM3X-5.0

Texas Instruments · Voltage Reference · SOT-23

LM4040CEM3X-5.0 from Texas Instruments, in a SOT-23. 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 Cathode output Output voltage terminal providing 5V reference cathode; accepts shunt current from 74µA minimum to 15mA maximum.
2 Anode power_in Anode terminal typically connected to ground, establishing 0V reference for the voltage regulator.
3 NC unconnected Parasitic Schottky diode connection between cathode and anode; must be left floating or connected to pin 2 for EMI suppression.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23
Category Power Management (PMIC)
Pins 3

CAD (KiCad official)

  • Symbol: LM4040CEM3X-5.0
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: lm4040cem3x-5-0-etched.step / lm4040cem3x-5-0-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm4040cem3x-5-0.step / lm4040cem3x-5-0.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (84 pp, sha256 5655b017c6397138, retrieved 2026-10-01, 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-4-5-20251001 (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