component
LM4040DIM3X-4.1
Public Made by Adomby adom
Texas Instruments Voltage Reference, SOT-23. 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
markdownLM4040DIM3X-4.1
Texas Instruments · Voltage Reference · SOT-23
LM4040DIM3X-4.1 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 | bidirectional | 负极/阴极引脚 (Cathode): shunt current flows in/out of this pin and it is the node from which the regulated reverse breakdown (output) voltage is taken; datasheet lists I/O as the pin's signal type ('并联电流/输出电压'). |
| 2 | Anode | power_in | 正极/阳极引脚 (Anode): datasheet states this pin is normally tied to ground ('阳极引脚通常接地'); it is the reference/return terminal of the shunt reference. |
| 3 | * | passive | Unlabeled pin marked '*' in the pinout table; the datasheet states this pin must be left floating or connected to the anode (pin 2). In applications with high EMI or significant high-frequency switching noise, TI recommends tying this pin to the anode; a parasitic Schottky diode exists between this pin and the internal die-attach contact. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
LM4040DIM3X-4.1 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
lm4040dim3x-4-1-etched.step/lm4040dim3x-4-1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm4040dim3x-4-1.step/lm4040dim3x-4-1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (84 pp, sha256
5655b017c6397138, retrieved 2026-09-24, 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 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).