HT6873B5SPNR

@@ -0,0 +1,50 @@+# HT6873B5SPNR++**Jiaxing Heroic Elec Tech HT6873** · Audio Power OpAmps · SOP-8++HT6873B5SPNR from Jiaxing Heroic Elec Tech HT6873, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | CTRL | input | Shutdown and ACF mode control terminal. Voltage on CTRL selects operating mode: ≥2.00 V = ACF-Off, 1.55-1.85 V = ACF-1 (~3% max THD+N), 1.10-1.40 V = ACF-2 (~10% max THD+N), and ≤0.30 V = Shutdown. Typically driven from VDD via a switch with an external pull-down resistor (RPD). |+| 2 | BYPASS | passive | Analog reference / mid-supply bypass terminal. Nominal voltage is VDD/2. Bypass to GND with a 1 µF capacitor (CB) for PSRR and low-noise performance. |+| 3 | IN- | input | Negative differential audio input. AC-couple through CIN (1 µF) and series RIN (12 kΩ) to the source (or to ground for single-ended input). |+| 4 | IN+ | input | Positive differential audio input. AC-couple through CIN (1 µF) and series RIN (12 kΩ) to the audio source. Voltage gain Av = 25.5 dB with RIN = 12 kΩ. |+| 5 | OUT+ | output | Positive Class-D BTL output. Connects directly to one speaker terminal (filter-less). Switching carrier is ~470 kHz PWM. |+| 6 | VDD | power_in | Power supply input. Recommended 2.5 V to 6 V (typ. 5 V); absolute max 6.5 V. Decouple with 220 µF (CS2) bulk and 1 µF (CS1) ceramic to GND close to the pin. |+| 7 | GND | power_in | Device ground / VSS. Common return for power supply, input coupling, and CTRL pull-down. |+| 8 | OUT- | output | Negative Class-D BTL output. Connects directly to the other speaker terminal (filter-less). Together with OUT+ forms the bridge-tied load driving the speaker. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Jiaxing Heroic Elec Tech HT6873 |+| Package | SOP-8 |+| Category | Op-amp/Cmp |+| Pins | 8 |++## Ordering variants++- `HT6873B5SPNRHT6873B5SPNT`+- `HT6873B5SPNR`+- `HT6873B5SPNRHT6873B5SPET`+- `HT6873B5SPNRHT6873B5SPER`++## CAD (KiCad official)++- Symbol: `HT6873B5SPNR`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Jiaxing Heroic Elec Tech HT6873 datasheet](docs/ht6873b5spnr-datasheet.pdf) (16 pp, sha256 `1e59a0341bfd7353`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/ht6873b5spnr-datasheet.pdf)

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