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LM4040CYM3-4.1-TR
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Microchip Tech Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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LM4040CYM3-4.1-TR
Microchip Tech · Voltage Reference · SOT-23
LM4040CYM3-4.1-TR from Microchip Tech, 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 | + | passive | Cathode (+) of the fixed shunt reference; connect to the positive voltage node. |
| 2 | , | power_in | Anode (-) of the reference; connect to the negative voltage node, and on the SOT-23 package pin 3 must float or be connected to this pin. |
| 3 | NC | unconnected | Not internally connected; it must be left floating or connected to the - pin (pin 2). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reverse-Breakdown Voltage Tolerance (C-grade, 25°C) | -20 | 20 | mV | IR = 100 µA, TA = +25°C | 6 | ||
| Reverse-Breakdown Voltage Tolerance (C-grade, overtemperature) | -47 | 47 | mV | IR = 100 µA | 6 | ||
| Minimum Operating Current | IRMIN | 50 | 68 | µA | TA = +25°C | 6 | |
| Minimum Operating Current (overtemperature) | IRMIN | 73 | µA | 6 | |||
| Average Reverse-Breakdown Voltage Temperature Coefficient | ∆VR/∆T | -100 | 20 | 100 | ppm/°C | IR = 1 mA | 6 |
| Reverse-Breakdown Voltage Change with Operating Current Change | ∆VR/∆IR | 0.5 | 0.9 | mV | IRMIN ≤ IR ≤ 1 mA, TA = +25°C | 6 | |
| Reverse-Breakdown Voltage Change with Operating Current Change (overtemperature) | ∆VR/∆IR | 1.2 | mV | IRMIN ≤ IR ≤ 1 mA | 6 | ||
| Reverse-Breakdown Voltage Change with Operating Current Change | ∆VR/∆IR | 3 | 7 | mV | 1 mA ≤ IR ≤ 15 mA, TA = +25°C | 6 | |
| Reverse-Breakdown Voltage Change with Operating Current Change (overtemperature) | ∆VR/∆IR | 10 | mV | 1 mA ≤ IR ≤ 15 mA | 6 | ||
| Reverse Dynamic Impedance | ZR | 0.5 | 1 | Ω | IR = 1 mA, f = 120 Hz, IAC = 0.1 IR, TA = +25°C | 6 | |
| Reverse Current (LM4040-4.1) lower operating limit | IR | 68 | µA | Operating Ratings, LM4040-4.1 | 3 | ||
| Reverse Current (LM4040-4.1) upper operating limit | IR | 15 | mA | Operating Ratings, LM4040-4.1 | 3 | ||
| Operating Temperature Range | TA | -40 | 85 | °C | 15 | ||
| Reverse Current | IR | 20 | mA | 3 | |||
| Forward Current | IF | 10 | mA | 3 | |||
| ESD Susceptibility (HBM) | 2 | kV | Human body model, Note 2 | 3 | |||
| ESD Susceptibility (MM) | 200 | V | Machine model, Note 2 | 3 | |||
| Storage Temperature | TS | -65 | 150 | °C | 15 | ||
| Maximum Junction Temperature | TJMAX | 125 | °C | Note 1 | 3 | ||
| Lead Temperature (vapor phase) | 215 | °C | Vapor phase, 60 s | 15 | |||
| Lead Temperature (infrared) | 220 | °C | Infrared, 15 s | 15 | |||
| Reverse-Breakdown Voltage | VR | 4.096 | V | IR = 100 µA, TA = +25°C | 6 | ||
| Average Reverse-Breakdown Voltage Temperature Coefficient | ∆VR/∆T | 30 | ppm/°C | IR = 10 mA, TA = +25°C | 6 | ||
| Average Reverse-Breakdown Voltage Temperature Coefficient | ∆VR/∆T | 20 | ppm/°C | IR = 100 µA, TA = +25°C | 6 | ||
| Wideband Noise | eN | 80 | µVRMS | IR = 100 µA, TA = +25°C, 10 Hz ≤ f ≤ 10 kHz | 6 | ||
| Reverse-Breakdown Voltage Long-Term Stability | ∆VR | 120 | ppm | t = 1000 hrs., TA = +25°C ±0.1°C, IR = 100 µA | 6 | ||
| Package Thermal Resistance, junction to ambient (3-Pin SOT-23) | ΘJA | 326 | °C/W | Board-mounted | 15 |
CAD (KiCad official)
- Symbol:
LM4040CYM3-4.1-TR - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
lm4040cym3-4-1-tr-etched.step/lm4040cym3-4-1-tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm4040cym3-4-1-tr.step/lm4040cym3-4-1-tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (30 pp, sha256
0e4fb1d4d0ad4f92, retrieved 2026-10-21, tier: lcsc) - 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).
# LM4040CYM3-4.1-TR
**Microchip Tech** · Voltage Reference · SOT-23
LM4040CYM3-4.1-TR from Microchip Tech, 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 | + | passive | Cathode (+) of the fixed shunt reference; connect to the positive voltage node. |
| 2 |, | power_in | Anode (-) of the reference; connect to the negative voltage node, and on the SOT-23 package pin 3 must float or be connected to this pin. |
| 3 | NC | unconnected | Not internally connected; it must be left floating or connected to the - pin (pin 2). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reverse-Breakdown Voltage Tolerance (C-grade, 25°C) | | -20 | | 20 | mV | IR = 100 µA, TA = +25°C | 6 |
| Reverse-Breakdown Voltage Tolerance (C-grade, overtemperature) | | -47 | | 47 | mV | IR = 100 µA | 6 |
| Minimum Operating Current | IRMIN | | 50 | 68 | µA | TA = +25°C | 6 |
| Minimum Operating Current (overtemperature) | IRMIN | | | 73 | µA | | 6 |
| Average Reverse-Breakdown Voltage Temperature Coefficient | ∆VR/∆T | -100 | 20 | 100 | ppm/°C | IR = 1 mA | 6 |
| Reverse-Breakdown Voltage Change with Operating Current Change | ∆VR/∆IR | | 0.5 | 0.9 | mV | IRMIN ≤ IR ≤ 1 mA, TA = +25°C | 6 |
| Reverse-Breakdown Voltage Change with Operating Current Change (overtemperature) | ∆VR/∆IR | | | 1.2 | mV | IRMIN ≤ IR ≤ 1 mA | 6 |
| Reverse-Breakdown Voltage Change with Operating Current Change | ∆VR/∆IR | | 3 | 7 | mV | 1 mA ≤ IR ≤ 15 mA, TA = +25°C | 6 |
| Reverse-Breakdown Voltage Change with Operating Current Change (overtemperature) | ∆VR/∆IR | | | 10 | mV | 1 mA ≤ IR ≤ 15 mA | 6 |
| Reverse Dynamic Impedance | ZR | | 0.5 | 1 | Ω | IR = 1 mA, f = 120 Hz, IAC = 0.1 IR, TA = +25°C | 6 |
| Reverse Current (LM4040-4.1) lower operating limit | IR | 68 | | | µA | Operating Ratings, LM4040-4.1 | 3 |
| Reverse Current (LM4040-4.1) upper operating limit | IR | | | 15 | mA | Operating Ratings, LM4040-4.1 | 3 |
| Operating Temperature Range | TA | -40 | | 85 | °C | | 15 |
| Reverse Current | IR | | | 20 | mA | | 3 |
| Forward Current | IF | | | 10 | mA | | 3 |
| ESD Susceptibility (HBM) | | | | 2 | kV | Human body model, Note 2 | 3 |
| ESD Susceptibility (MM) | | | | 200 | V | Machine model, Note 2 | 3 |
| Storage Temperature | TS | -65 | | 150 | °C | | 15 |
| Maximum Junction Temperature | TJMAX | | | 125 | °C | Note 1 | 3 |
| Lead Temperature (vapor phase) | | | | 215 | °C | Vapor phase, 60 s | 15 |
| Lead Temperature (infrared) | | | | 220 | °C | Infrared, 15 s | 15 |
| Reverse-Breakdown Voltage | VR | | 4.096 | | V | IR = 100 µA, TA = +25°C | 6 |
| Average Reverse-Breakdown Voltage Temperature Coefficient | ∆VR/∆T | | 30 | | ppm/°C | IR = 10 mA, TA = +25°C | 6 |
| Average Reverse-Breakdown Voltage Temperature Coefficient | ∆VR/∆T | | 20 | | ppm/°C | IR = 100 µA, TA = +25°C | 6 |
| Wideband Noise | eN | | 80 | | µVRMS | IR = 100 µA, TA = +25°C, 10 Hz ≤ f ≤ 10 kHz | 6 |
| Reverse-Breakdown Voltage Long-Term Stability | ∆VR | | 120 | | ppm | t = 1000 hrs., TA = +25°C ±0.1°C, IR = 100 µA | 6 |
| Package Thermal Resistance, junction to ambient (3-Pin SOT-23) | ΘJA | | 326 | | °C/W | Board-mounted | 15 |
## CAD (KiCad official)
- Symbol: `LM4040CYM3-4.1-TR`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `lm4040cym3-4-1-tr-etched.step` / `lm4040cym3-4-1-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm4040cym3-4-1-tr.step` / `lm4040cym3-4-1-tr.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Microchip Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586187184911093760) (30 pp, sha256 `0e4fb1d4d0ad4f92`, retrieved 2026-10-21, 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](docs/lm4040cym3-4-1-tr-datasheet.pdf)