component
WS742133H-14
Public Unreviewedby Ray
WILLSEMI Will Semicon Audio Power OpAmps, TSSOP-14. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
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PCB Footprint
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Datasheet
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README
markdownWS742133H-14
WILLSEMI Will Semicon · Audio Power OpAmps · TSSOP-14
WS742133H-14 from WILLSEMI Will Semicon, in a TSSOP-14. 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 | +INR | input | Right-channel positive (non-inverting) audio input. Requires a DC input-blocking capacitor in series to bias the input, and forms an RC high-pass with the external input resistor RIN. |
| 2 | -INR | input | Right-channel negative (inverting) audio input. Connects through RIN to the source and through RFB to OUTR to set the inverting/differential gain (RFB/RIN). |
| 3 | OUTR | output | Right-channel single-ended audio output. Drives up to 2Vrms at 3.3V VDD or 3Vrms at 5V VDD into 600Ω without a DC-blocking capacitor. A TVS diode to ground is recommended for surge protection. |
| 4 | SGND | power_in | Signal (analog) ground reference for the audio path. Should be tied to the system analog ground plane, separate from PGND when possible. |
| 5 | EN | input | Active-high enable input. VIH ≥ 1.1V enables the driver; VIL ≤ 0.4V shuts the device down with input-to-output attenuation of ~90dB. Input current ≤ 1µA in either state. |
| 6 | PVSS | power_out | Negative supply rail generated by the internal charge pump. Requires an external Cpvss reservoir capacitor (0.33 to 1µF) to ground; do not load externally. |
| 7 | CN | passive | Charge-pump flying capacitor negative terminal. Connects to the negative terminal of the external Cpump flying capacitor (0.33 to 1µF); the positive terminal goes to CP (pin 8). Charge-pump frequency is typ. 400-410kHz. |
| 8 | CP | passive | Charge-pump flying capacitor positive terminal. Pair with CN (pin 7) using an external Cpump flying capacitor (0.33 to 1µF). |
| 9 | PVDD | power_in | Positive supply input, 3.0V to 5.5V (absolute max 6V). Bypass with a 1µF ceramic to PGND; a 600Ω@100MHz ferrite bead in series is recommended for noise-sensitive supplies (RC filtering can trigger the UVP shutdown). |
| 10 | PGND | power_in | Power/return ground for the PVDD supply and charge pump. Tie to the system ground; keep the PVDD bypass cap loop tight to this pin. |
| 11 | UVP | input | External under-voltage protection sense input. Trips at VUVP = 1.21V typ (1.14-1.31V) with 4.7µA of hysteresis current; connect a resistor divider (R11/R12/R13 in the application circuit) from the monitored system supply to set the mute threshold. |
| 12 | OUTL | output | Left-channel single-ended audio output. Drives up to 2Vrms at 3.3V VDD or 3Vrms at 5V VDD into 600Ω without a DC-blocking capacitor. A TVS diode to ground is recommended for surge protection. |
| 13 | -INL | input | Left-channel negative (inverting) audio input. Connects through RIN to the source and through RFB to OUTL to set the inverting/differential gain (RFB/RIN). |
| 14 | +INL | input | Left-channel positive (non-inverting) audio input. Requires a DC input-blocking capacitor in series to bias the input, and forms an RC high-pass with the external input resistor RIN. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WILLSEMI Will Semicon |
| Package | TSSOP-14 |
| Category | Op-amp/Cmp |
| Pins | 14 |
Ordering variants
Same part, different packaging or reel option.
WS742133H-14/TR
CAD (KiCad official)
- Symbol:
WS742133H-14 - Footprint:
Package_SO:TSSOP-14_4.4x5mm_P0.65mm - 3D model: TSSOP-14 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WILLSEMI Will Semicon datasheet (13 pp, sha256
8a6d4f399c56bbce, 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).