component
LM4871BM
Public Made by Adomby adom
HGSEMI Audio Amplifiers, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM4871BM
HGSEMI · Audio Amplifiers · SOP-8
LM4871BM from HGSEMI, 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 | SHUTDOWN | input | Active-high shutdown control that disconnects the amplifier bias when driven high; it must be tied to VDD to shut down or to GND to enable the amplifier and must not be left floating. |
| 2 | BYPASS | output | Internal bias voltage node that requires a bypass capacitor CB, typically 0.1 µF, with the value chosen for low-frequency THD+N, system cost and size. |
| 3 | +IN | input | Non-inverting analog audio input of the amplifier. |
| 4 | -IN | input | Inverting analog audio input which, together with feedback resistor Rf and input resistor Ri, sets the closed-loop gain with AVD = 2(Rf/Ri) in bridge mode. |
| 5 | VO1 | output | Negative analog output of the bridge-tied load driver. |
| 6 | VDD | power_in | Power supply pin with a recommended operating range of 2.0 V to 5.0 V and an absolute maximum operating voltage of 6.0 V. |
| 7 | GND | power_in | Ground reference pin for the device. |
| 8 | VO2 | output | Positive analog output of the bridge-tied load driver; in single-ended use it is connected as a pseudo-load with a resistor and capacitor for stability. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOP-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM4871BM - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
lm4871bm-etched.step/lm4871bm-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm4871bm.step/lm4871bm.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (13 pp, sha256
479d1184e9fd9d02, retrieved 2026-10-12, 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: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).