# HT2171ARZ

**HTCSEMI** · Operational Amplifier · SOP-8

HT2171ARZ 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 | OUTA | output | Amplifier A output; the voltage range extends to within millivolts of each supply rail. |
| 2 | INPA | input | Non-inverting input of amplifier A; the voltage range can go from 0 to VDD. |
| 3 | INNA | input | Inverting input of amplifier A; it has the same voltage range as INPA, from 0 to VDD. |
| 4 | GND | power_in | Ground pin; connect to the most negative supply, and all GND pads are connected on die. |
| 5 | INPB | input | Non-inverting input of amplifier B; the voltage range can go from 0 to VDD. |
| 6 | INNB | input | Inverting input of amplifier B; it has the same voltage range as INPB, from 0 to VDD. |
| 7 | OUTB | output | Amplifier B output; the voltage range extends to within millivolts of each supply rail. |
| 8 | VDD | power_in | Positive power supply (5V nominal), connected to the positive voltage supply; the operating supply range is 2.5V to 5.5V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| Package | SOP-8 |
| Category | Amplifiers/Comparators |
| 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 |
|---|---|---|---|---|---|---|---|
| Power supply voltage (absolute maximum) | VDD |  |  | 6 | V |  | 2 |
| Operating ambient temperature range (absolute maximum) | TA | -40 |  | 125 | ℃ |  | 2 |
| Storage temperature | TSTG | -65 |  | 150 | ℃ |  | 2 |
| Power supply voltage (recommended operating) | VDD | 2.5 |  | 5.5 | V |  | 2 |
| Operating ambient temperature range (recommended operating) | TA | -40 |  | 125 | ℃ |  | 2 |
| Operating supply voltage | VCC | 2.5 | 5 | 5.5 | V | TA=+27℃, VDD=5V, VCM=VOUT=VDD/2, RL=10Kohm, CL=100pF (table header) | 3 |
| Input offset voltage | VOS | -500 | 200 | 500 | uV | TA=+27℃, VDD=5V, VCM=VOUT=VDD/2, RL=10Kohm, CL=100pF (table header); printed as +/-200 in typ column | 3 |
| Input resistance | RIN | 100 |  |  | GΩ | TA=+27℃, VDD=5V, VCM=VOUT=VDD/2, RL=10Kohm, CL=100pF (table header); printed as >100 | 3 |
| Quiescent current per amplifier | IQ | 150 | 330 |  | uA | TA=+27℃, VDD=5V, VCM=VOUT=VDD/2, RL=10Kohm, CL=100pF (table header) | 3 |
| Common mode input voltage | Vin_cm | 0 |  |  | V | TA=+27℃, VDD=5V, VCM=VOUT=VDD/2, RL=10Kohm, CL=100pF (table header); printed max is VDD-0.1 V, not a numeric value | 3 |

## CAD (KiCad official)

- Symbol: `HT2171ARZ`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ht2171arz-etched.step` / `ht2171arz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ht2171arz.step` / `ht2171arz.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/8588946737340305408) (10 pp, sha256 `68b14ade0f356321`, retrieved 2026-10-19, 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/ht2171arz-datasheet.pdf)