# HT2411ARZ

**HTCSEMI** · Audio Power OpAmps · SOP-8

HT2411ARZ 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 | VCC | power_in | Power supply pin with a DC supply voltage absolute maximum rating of 36 V and a supply initiation voltage (VSI) of 17 to 21 V. |
| 2 | RSL | input | Resistor select pin used on the HT2411 to change the supply initiation current (ISI) through an external resistor, shown with RSL=6.2k, 10k and 15k. |
| 3 | LFI | input | Low frequency oscillator input, where the low tone frequency is set by R1 and C1 with fL = 1/(1.359×R1×C1). |
| 4 | LFO | output | Low frequency oscillator output of the low tone generator. |
| 5 | GND | power_in | Ground pin; all voltage values in the datasheet are stated with respect to the anode terminal. |
| 6 | HFO | output | High frequency oscillator output, where fH1 = 1/(1.518×R2×C2) and fH2 = 1.214×fH1. |
| 7 | HFI | input | High frequency oscillator input, where the high tone frequency is set by R2 and C2. |
| 8 | OUT | output | Output amplifier pin with a minimum high output voltage (VOH) of 17.7 V at IOH=15mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| Package | SOP-8 |
| Category | Operational Amplifier/Comparator |
| 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 |
|---|---|---|---|---|---|---|---|
| DC Supply Voltage | VCC |  |  | 36 | V |  | 2 |
| Power Dissipation | PD |  |  | 450 | mW |  | 2 |
| Operating Ambient Temperature Range | TA | -25 |  | 75 | ℃ |  | 2 |
| Storage Temperature Range | TSTG | -65 |  | 150 | ℃ |  | 2 |
| Operating Voltage | VCC |  |  | 36 | V | VCC=24V, TA=25℃ | 2 |
| Supply Initiation Voltage | VSI | 17 | 19 | 21 | V | VCC=24V, TA=25℃ | 2 |
| Supply Initiation Current | ISI | 1.4 | 2.5 | 4.2 | mA | VCC=VSI, No load | 2 |
| Sustaining Voltage | VSUS | 9.7 | 10.5 | 12 | V | VCC=24V, TA=25℃ | 2 |
| Sustaining Current | ISUS | 0.2 | 0.9 | 2.5 | mA | VCC=VSUS, No load | 2 |
| Oscillator Freq. fL | fL | 9 | 10 | 11 | Hz | R1=165kΩ, C1=0.47µf | 2 |
| Oscillator Freq. fH1 | fH1 | 461 | 512 | 563 | Hz | R2=191kΩ, C2=6800pF | 2 |
| Oscillator Freq. fH2 | fH2 | 576 | 640 | 703 | Hz | R2=191kΩ, C2=6800pF | 2 |
| Output High Voltage | VOH | 17.7 | 19 | 21.5 | V | VCC=21V, IOH=15mA | 2 |
| Output Low Voltage | VOL |  |  | 1.6 | V | VCC=21V, IOL=15mA | 2 |

## CAD (KiCad official)

- Symbol: `HT2411ARZ`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ht2411arz-etched.step` / `ht2411arz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ht2411arz.step` / `ht2411arz.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [HTCSEMI datasheet](docs/ht2411arz-datasheet.pdf) (6 pp, sha256 `f647c5b7e189961e`, retrieved 2026-10-31, 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/ht2411arz-datasheet.pdf)