component
TL431AM
Public Made by Adomby adom
HGSEMI Voltage Reference, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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TL431AM
HGSEMI · Voltage Reference · SOP-8
TL431AM from HGSEMI, in a SOP-8. 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 | passive | Cathode of the shunt regulator; operating cathode voltage from VREF up to 36V (absolute max 36V) and cathode current 0.2 to 100mA. |
| 2 | ANODE | passive | Anode of the shunt regulator, normally connected to ground; internally tied to the other ANODE pins. |
| 3 | ANODE | passive | Anode of the shunt regulator, normally connected to ground; internally tied to the other ANODE pins. |
| 4 | NC | unconnected | No connection. |
| 5 | NC | unconnected | No connection. |
| 6 | ANODE | passive | Anode of the shunt regulator, normally connected to ground; internally tied to the other ANODE pins. |
| 7 | ANODE | passive | Anode of the shunt regulator, normally connected to ground; internally tied to the other ANODE pins. |
| 8 | REF | input | Reference input that sets the cathode voltage via the divider, with a 2.470V to 2.520V reference (1.0% TL431A grade) and absolute max reference current of 10mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reference voltage (TL431A, 1.0%) | VREF | 2.47 | 2.495 | 2.52 | V | VKA=VREF IKA=10mA | 5 |
| Minimum cathode current | IKA(Min) | 150 | 400 | µA | VKA=VREF | 5 | |
| Dynamic impedance | ZKA | 0.1 | 0.5 | Ω | VKA=VREF IKA=1 to 100mA f≤1.0KHz | 5 | |
| Off-state cathode current | IKA(Off) | 0.01 | 1 | µA | VKA=36V VREF=0 | 5 | |
| Reference current | IREF | 0.3 | 0.6 | µA | IKA=10mA R1=10KΩ R2=∞ | 5 | |
| Reference current temperature drift | ΔIREF | 0.2 | 0.3 | µA | IKA=10mA R1=10KΩ R2=∞ TA=-10℃to85℃ | 5 | |
| Reference voltage temperature drift | ΔVREF | -5 | -20 | mV | VKA=VREF IKA=10mA -20℃ to 110℃ | 5 | |
| Line regulation (VKA=10V to VREF) | ∆VREF/∆VKA | -1.87 | mV/V | IKA=10mA VKA=10V to VREF | 5 | ||
| Line regulation (VKA=36V to 10V) | ∆VREF/∆VKA | -1.38 | mV/V | IKA=10mA VKA=36V to 10V | 5 | ||
| Cathode voltage | VKA | 36 | V | 4 | |||
| Cathode current | IKA | 0.2 | 100 | mA | 4 | ||
| Operating ambient temperature | TA | -40 | 85 | ℃ | 4 | ||
| Cathode voltage | VKA | 36 | V | 3 | |||
| Cathode current range | IKA | -100 | 150 | mA | 3 | ||
| Reference input current range | IREF | 10 | mA | 3 | |||
| Junction temperature | TJ | 150 | ℃ | 3 | |||
| Lead soldering temperature | TL | 260 | ℃ | 10s | 3 | ||
| Storage temperature | TSTG | -65 | 150 | ℃ | 3 | ||
| ESD (human body model) | ESD | 3500 | V | Human body model | 3 | ||
| Thermal resistance junction-to-case (SOP-8) | θJC | 150 | ℃/W | SOP-8 package | 5 | ||
| Power rating (SOP-8) | 770 | mW | Ta=25℃, SOP-8 package | 4 |
CAD (KiCad official)
- Symbol:
TL431AM - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
tl431am-etched.step/tl431am-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431am.step/tl431am.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (13 pp, sha256
4e52f2b24a7cd4f5, retrieved 2026-10-18, 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-sonnet-5-5(text+vision), consensusclaude-opus-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).
# TL431AM
**HGSEMI** · Voltage Reference · SOP-8
TL431AM from HGSEMI, in a SOP-8. 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 | passive | Cathode of the shunt regulator; operating cathode voltage from VREF up to 36V (absolute max 36V) and cathode current 0.2 to 100mA. |
| 2 | ANODE | passive | Anode of the shunt regulator, normally connected to ground; internally tied to the other ANODE pins. |
| 3 | ANODE | passive | Anode of the shunt regulator, normally connected to ground; internally tied to the other ANODE pins. |
| 4 | NC | unconnected | No connection. |
| 5 | NC | unconnected | No connection. |
| 6 | ANODE | passive | Anode of the shunt regulator, normally connected to ground; internally tied to the other ANODE pins. |
| 7 | ANODE | passive | Anode of the shunt regulator, normally connected to ground; internally tied to the other ANODE pins. |
| 8 | REF | input | Reference input that sets the cathode voltage via the divider, with a 2.470V to 2.520V reference (1.0% TL431A grade) and absolute max reference current of 10mA. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reference voltage (TL431A, 1.0%) | VREF | 2.47 | 2.495 | 2.52 | V | VKA=VREF IKA=10mA | 5 |
| Minimum cathode current | IKA(Min) | | 150 | 400 | µA | VKA=VREF | 5 |
| Dynamic impedance | ZKA | | 0.1 | 0.5 | Ω | VKA=VREF IKA=1 to 100mA f≤1.0KHz | 5 |
| Off-state cathode current | IKA(Off) | | 0.01 | 1 | µA | VKA=36V VREF=0 | 5 |
| Reference current | IREF | | 0.3 | 0.6 | µA | IKA=10mA R1=10KΩ R2=∞ | 5 |
| Reference current temperature drift | ΔIREF | | 0.2 | 0.3 | µA | IKA=10mA R1=10KΩ R2=∞ TA=-10℃to85℃ | 5 |
| Reference voltage temperature drift | ΔVREF | | -5 | -20 | mV | VKA=VREF IKA=10mA -20℃ to 110℃ | 5 |
| Line regulation (VKA=10V to VREF) | ∆VREF/∆VKA | | -1.87 | | mV/V | IKA=10mA VKA=10V to VREF | 5 |
| Line regulation (VKA=36V to 10V) | ∆VREF/∆VKA | | -1.38 | | mV/V | IKA=10mA VKA=36V to 10V | 5 |
| Cathode voltage | VKA | | | 36 | V | | 4 |
| Cathode current | IKA | 0.2 | | 100 | mA | | 4 |
| Operating ambient temperature | TA | -40 | | 85 | ℃ | | 4 |
| Cathode voltage | VKA | | | 36 | V | | 3 |
| Cathode current range | IKA | -100 | | 150 | mA | | 3 |
| Reference input current range | IREF | | | 10 | mA | | 3 |
| Junction temperature | TJ | | | 150 | ℃ | | 3 |
| Lead soldering temperature | TL | | | 260 | ℃ | 10s | 3 |
| Storage temperature | TSTG | -65 | | 150 | ℃ | | 3 |
| ESD (human body model) | ESD | | | 3500 | V | Human body model | 3 |
| Thermal resistance junction-to-case (SOP-8) | θJC | | 150 | | ℃/W | SOP-8 package | 5 |
| Power rating (SOP-8) | | | | 770 | mW | Ta=25℃, SOP-8 package | 4 |
## CAD (KiCad official)
- Symbol: `TL431AM`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `tl431am-etched.step` / `tl431am-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl431am.step` / `tl431am.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [HGSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757704202006990848) (13 pp, sha256 `4e52f2b24a7cd4f5`, retrieved 2026-10-18, 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-sonnet-5-5` (text+vision), consensus `claude-opus-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/tl431am-datasheet.pdf)