component
HT431ARZ
Public Made by Adomby adom
HTCSEMI Voltage Reference, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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HT431ARZ
HTCSEMI · Voltage Reference · SOP-8
HT431ARZ from HTCSEMI, 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 (K) of the shunt regulator; output voltage settable from Vref (about 2.5 V) to 40 V, with recommended cathode current 0.5 mA to 100 mA and VKA absolute max 44 V. |
| 2 | ANODE | passive | Anode (A) of the shunt regulator, connected to the most negative potential/ground; pins 2, 3, 6 and 7 are all Anode. |
| 3 | ANODE | passive | Anode (A) of the shunt regulator, connected to the most negative potential/ground; pins 2, 3, 6 and 7 are all Anode. |
| 4 | NC | unconnected | No internal connection (N/C). |
| 5 | NC | unconnected | No internal connection (N/C). |
| 6 | ANODE | passive | Anode (A) of the shunt regulator, connected to the most negative potential/ground; pins 2, 3, 6 and 7 are all Anode. |
| 7 | ANODE | passive | Anode (A) of the shunt regulator, connected to the most negative potential/ground; pins 2, 3, 6 and 7 are all Anode. |
| 8 | REFERENCE | input | Reference (R) input that sets the output voltage via an external resistor divider; Vref is 2.495 V typ and the input current range is 0.05 to 10 mA max. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| 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 Input Voltage | VREF | 2.482 | 2.495 | 2.508 | V | VKA = VREF, IK = 10mA (HT431A 0.5% column) | 2 |
| Deviation of Reference Input Voltage Over Full Temperature Range | VREF(dev) | 3 | 17 | MV | Tmin Ta Tmax | 2 | |
| Ratio of Change in Reference Input Voltage to Change in Cathode Voltage | VREF/VKA | -1.4 | -2.7 | mV/V | VKA = 10V-VREF | 2 | |
| Ratio of Change in Reference Input Voltage to Change in Cathode Voltage | VREF/VKA | -1 | -2 | mV/V | VKA = 36V- 10V | 2 | |
| Reference Input Current | IREF | 1.8 | 4 | ㎂ | R1 = 10K, R2 = (R2 value not legible in extracted text) | 2 | |
| Deviation of Reference Input Current Over Full Temperature Range | IREF(dev) | 0.4 | 1.2 | ㎂ | R1 = 10K, R2 = (R2 value not legible in extracted text) | 2 | |
| Minimum Cathode Current for Regulation | IK(min) | 0.25 | 0.5 | mA | 2 | ||
| Off-State Cathode Current | IK(off) | 0.26 | 0.9 | ㎂ | VKA = 40 V, VREF = 0 | 2 | |
| Dynamic Impedance | ZKA | 0.22 | 0.5 | IK = 10mA to 100 mA, f 1.0KHz | 2 | ||
| Cathode Voltage | VKA | 40 | V | VREF | 2 | ||
| Cathode Current | IK | 0.5 | 100 | mA | 2 | ||
| Cathode Voltage | VKA | 44 | V | 1 | |||
| Cathode Current Range (Continuous) | IK | -100 | 150 | mA | 1 | ||
| Reference Input Current Range | IREF | 0.05 | 10 | mA | 1 | ||
| Power Dissipation at 25oC (SOP package) | PD | 0.7 | W | SOP, TO-92 package at 25oC | 1 | ||
| Junction Temperature Range | TJ | -25 | 150 | oC | 1 | ||
| Operating Temperature Range | Tg | -25 | 85 | oC | Operating temperature range applies unless otherwise specified | 1 | |
| Storage Temperature Range | Tstg | -65 | 150 | oC | 1 | ||
| Thermal Resistance Junction-to-Ambient (SOP package) | RJA | 178 | oC/W | SOP, TO-92 package; value printed without min/max | 1 |
CAD (KiCad official)
- Symbol:
HT431ARZ - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
ht431arz-etched.step/ht431arz-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ht431arz.step/ht431arz.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HTCSEMI datasheet (6 pp, sha256
0717f21d1e892efe, retrieved 2026-10-18, tier: lcsc) - 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).
# HT431ARZ
**HTCSEMI** · Voltage Reference · SOP-8
HT431ARZ from HTCSEMI, 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 (K) of the shunt regulator; output voltage settable from Vref (about 2.5 V) to 40 V, with recommended cathode current 0.5 mA to 100 mA and VKA absolute max 44 V. |
| 2 | ANODE | passive | Anode (A) of the shunt regulator, connected to the most negative potential/ground; pins 2, 3, 6 and 7 are all Anode. |
| 3 | ANODE | passive | Anode (A) of the shunt regulator, connected to the most negative potential/ground; pins 2, 3, 6 and 7 are all Anode. |
| 4 | NC | unconnected | No internal connection (N/C). |
| 5 | NC | unconnected | No internal connection (N/C). |
| 6 | ANODE | passive | Anode (A) of the shunt regulator, connected to the most negative potential/ground; pins 2, 3, 6 and 7 are all Anode. |
| 7 | ANODE | passive | Anode (A) of the shunt regulator, connected to the most negative potential/ground; pins 2, 3, 6 and 7 are all Anode. |
| 8 | REFERENCE | input | Reference (R) input that sets the output voltage via an external resistor divider; Vref is 2.495 V typ and the input current range is 0.05 to 10 mA max. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| 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 Input Voltage | VREF | 2.482 | 2.495 | 2.508 | V | VKA = VREF, IK = 10mA (HT431A 0.5% column) | 2 |
| Deviation of Reference Input Voltage Over Full Temperature Range | VREF(dev) | | 3 | 17 | MV | Tmin Ta Tmax | 2 |
| Ratio of Change in Reference Input Voltage to Change in Cathode Voltage | VREF/VKA | | -1.4 | -2.7 | mV/V | VKA = 10V-VREF | 2 |
| Ratio of Change in Reference Input Voltage to Change in Cathode Voltage | VREF/VKA | | -1 | -2 | mV/V | VKA = 36V- 10V | 2 |
| Reference Input Current | IREF | | 1.8 | 4 | ㎂ | R1 = 10K, R2 = (R2 value not legible in extracted text) | 2 |
| Deviation of Reference Input Current Over Full Temperature Range | IREF(dev) | | 0.4 | 1.2 | ㎂ | R1 = 10K, R2 = (R2 value not legible in extracted text) | 2 |
| Minimum Cathode Current for Regulation | IK(min) | | 0.25 | 0.5 | mA | | 2 |
| Off-State Cathode Current | IK(off) | | 0.26 | 0.9 | ㎂ | VKA = 40 V, VREF = 0 | 2 |
| Dynamic Impedance | ZKA | | 0.22 | 0.5 | | IK = 10mA to 100 mA, f 1.0KHz | 2 |
| Cathode Voltage | VKA | | | 40 | V | VREF | 2 |
| Cathode Current | IK | 0.5 | | 100 | mA | | 2 |
| Cathode Voltage | VKA | | | 44 | V | | 1 |
| Cathode Current Range (Continuous) | IK | -100 | | 150 | mA | | 1 |
| Reference Input Current Range | IREF | 0.05 | | 10 | mA | | 1 |
| Power Dissipation at 25oC (SOP package) | PD | | | 0.7 | W | SOP, TO-92 package at 25oC | 1 |
| Junction Temperature Range | TJ | -25 | | 150 | oC | | 1 |
| Operating Temperature Range | Tg | -25 | | 85 | oC | Operating temperature range applies unless otherwise specified | 1 |
| Storage Temperature Range | Tstg | -65 | | 150 | oC | | 1 |
| Thermal Resistance Junction-to-Ambient (SOP package) | RJA | | 178 | | oC/W | SOP, TO-92 package; value printed without min/max | 1 |
## CAD (KiCad official)
- Symbol: `HT431ARZ`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ht431arz-etched.step` / `ht431arz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ht431arz.step` / `ht431arz.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [HTCSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603102331898773504) (6 pp, sha256 `0717f21d1e892efe`, retrieved 2026-10-18, tier: lcsc)
- **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/ht431arz-datasheet.pdf)