component
LM4040BIM3-3.0
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
markdownLM4040BIM3-3.0
Texas Instruments · Voltage Reference · SOT-23
LM4040BIM3-3.0 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 | power_out | Cathode (negative, −) terminal; regulated 3 V shunt reference output node; operating reverse current range 62 µA min to 15 mA max for LM4040-N-3.0; initial VR tolerance ±6 mV (±0.2%) at 25°C for B grade. |
| 2 | Anode | power_in | Anode (positive, +) terminal; normally connected to GND; Table 4-1 classifies this pin as Output (O), indicating it is the reference-common/ground connection of the shunt device. |
| 3 | NC | unconnected | Substrate/chip-connect contact (marked *); must be left floating or connected to pin 2 (anode) per Table 4-1 footnote (2); a parasitic Schottky diode exists between pin 1 (cathode) and this pin in the SOT-23 package, so connecting it to anode is recommended in high-EMI environments. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
LM4040BIM3-3.0 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
lm4040bim3-3-0-etched.step/lm4040bim3-3-0-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm4040bim3-3-0.step/lm4040bim3-3-0.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-4-6(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).