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LM4040BIM3-5.0
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Texas Instruments Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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LM4040BIM3-5.0
Texas Instruments · Voltage Reference · SOT-23
LM4040BIM3-5.0 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 | bidirectional | Shunt current / output voltage pin; the cathode must be biased through an external series resistor so the reverse current stays between IRMIN (74 µA for the 5.0 V version, recommended operating conditions) and IRMAX (15 mA). |
| 2 | ANODE | output | Anode pin, which the datasheet says is normally connected to ground; it is the reference node for the reverse breakdown voltage. |
| 3 | * | unconnected | Must be left floating or connected to pin 2 (anode); TI recommends connecting it to the anode in applications with strong electromagnetic interference or significant high-frequency switching noise. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
LM4040BIM3-5.0 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
lm4040bim3-5-0-etched.step/lm4040bim3-5-0-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm4040bim3-5-0.step/lm4040bim3-5-0.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 2026-10-10, 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, primaryclaude-haiku-5-5(text), consensusclaude-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).
# LM4040BIM3-5.0
**Texas Instruments** · Voltage Reference · SOT-23
LM4040BIM3-5.0 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 | bidirectional | Shunt current / output voltage pin; the cathode must be biased through an external series resistor so the reverse current stays between IRMIN (74 µA for the 5.0 V version, recommended operating conditions) and IRMAX (15 mA). |
| 2 | ANODE | output | Anode pin, which the datasheet says is normally connected to ground; it is the reference node for the reverse breakdown voltage. |
| 3 | * | unconnected | Must be left floating or connected to pin 2 (anode); TI recommends connecting it to the anode in applications with strong electromagnetic interference or significant high-frequency switching noise. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |
## CAD (KiCad official)
- Symbol: `LM4040BIM3-5.0`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `lm4040bim3-5-0-etched.step` / `lm4040bim3-5-0-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm4040bim3-5-0.step` / `lm4040bim3-5-0.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm4040-n) (84 pp, sha256 `5655b017c6397138`, retrieved 2026-10-10, 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-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](docs/lm4040bim3-5-0-datasheet.pdf)