ns4263

@@ -0,0 +1,52 @@+# NS4263++**Shenzhen Nsiway Tech** · Audio Power OpAmps · SOIC-16++NS4263 from Shenzhen Nsiway Tech, in a SOIC-16. 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 | SD | input | Shutdown and Class-AB/Class-D mode-select control via one-wire pulse (VIH=1.4V min, VIL=0.4V max). A logic high held >100 us places the chip in low-power shutdown; a single falling edge sets Class-AB, two consecutive falling edges set Class-D. THI/TLO pulse widths must be 1-12 us. |+| 2 | GND | power_in | Device ground / power return. Connect together with pins 7 and 15 to the board ground plane. |+| 3 | VoPA | output | Left-channel BTL positive output. Drives one side of the left speaker (4-8 Ω typical) in bridge-tied load mode; in single-ended headphone mode this side is coupled through the 100 uF output cap. |+| 4 | VDD | power_in | Main analog/PWM supply input, 3.0-5.5 V operating (6 V abs max). Bypass with 10 uF electrolytic in parallel with 0.1 uF ceramic close to the pin; tie together with pin 13. |+| 5 | VoNA | output | Left-channel BTL negative output. Drives the return side of the left speaker in bridge mode; used as the left-channel single-ended output to the headphone jack via the 100 uF DC-blocking capacitor. |+| 6 | INNA | input | Left-channel inverting audio input. AC-coupled through Ci (0.1-0.39 uF) and series input resistor Ri (typ. 20 kΩ); gain per channel Av = 240k / Rin. Non-inverting input is tied internally to VREF. |+| 7 | GND | power_in | Device ground / power return. Tie together with pins 2 and 15 to the ground plane. |+| 8 | NC | unconnected | No internal connection. Leave floating or tie to ground per PCB convenience. |+| 9 | NC | unconnected | No internal connection. Leave floating or tie to ground per PCB convenience. |+| 10 | VREF | passive | Internal mid-supply bias reference (approx. VDD/2). Requires a 1 uF bypass capacitor Cb to GND; the cap value sets startup ramp / pop-noise behavior. |+| 11 | INNB | input | Right-channel inverting audio input. AC-coupled through Ci (0.1-0.39 uF) and series input resistor Ri (typ. 20 kΩ); gain per channel Av = 240k / Rin. Non-inverting input is tied internally to VREF. |+| 12 | VoNB | output | Right-channel BTL negative output. Drives the return side of the right speaker in bridge mode; used as the right-channel single-ended output to the headphone jack via the 100 uF DC-blocking capacitor. |+| 13 | VDD | power_in | Main analog/PWM supply input, 3.0-5.5 V operating (6 V abs max). Tie together with pin 4 and bypass with 10 uF electrolytic in parallel with 0.1 uF ceramic close to the pin. |+| 14 | VoPB | output | Right-channel BTL positive output. Drives one side of the right speaker (4-8 Ω typical) in bridge-tied load mode. |+| 15 | GND | power_in | Device ground / power return. Tie together with pins 2 and 7 to the ground plane. |+| 16 | HP-IN | input | Headphone-mode select input (VIH=1.4V min, VIL=0.4V max). Logic low = BTL speaker mode; logic high = single-ended stereo headphone mode. Typically driven from a resistor divider off the headphone jack's mechanical switch (HP CONTROL) so plug insertion auto-switches the output topology. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Shenzhen Nsiway Tech |+| Package | SOIC-16 |+| Category | Op-amp/Cmp |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `NS4263`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Shenzhen Nsiway Tech datasheet](docs/ns4263-datasheet.pdf) (None pp, sha256 `7be7db0e3e023b07`, retrieved 2026-08-17, 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:** `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/ns4263-datasheet.pdf)

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