component
LM4861MM
Public Made by Adomby adom
HGSEMI Audio Amplifiers, MSOP-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
markdownLM4861MM
HGSEMI · Audio Amplifiers · MSOP-8
LM4861MM from HGSEMI, in a MSOP-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 | Shutdown control: logic high (VDD) turns the amplifier bias off (0.6µA typ), connect to GND to enable, and do not leave floating. |
| 2 | BYPASS | passive | Half-supply (VDD/2) bypass pin, decoupled with capacitor CB (1.0µF in the typical application) for half-supply filtering. |
| 3 | +IN | input | Non-inverting input of the first amplifier. |
| 4 | -IN | input | Inverting input of the first amplifier, with gain set by Rf/Ri and an input coupling capacitor Ci. |
| 5 | Vo1 | output | Output of the first amplifier, one side of the bridged load. |
| 6 | VDD | power_in | Positive supply, 2.5V to 5.5V operating range (6.0V absolute maximum), bypassed with CS. |
| 7 | GND | power_in | Ground. |
| 8 | Vo2 | output | Output of the second amplifier (fixed unity-gain inverting), other side of the bridged load. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | MSOP-8 |
| Category | Amplifiers/Comparators |
| 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 |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VDD | 2.5 | 5.5 | V | 5 | ||
| Supply Voltage (operating range) | VDD | 2.5 | 5.5 | V | 4 | ||
| Quiescent Power Supply Current | IDD | 6.5 | 10 | mA | VIN = 0V, IO = 0A | 5 | |
| Shutdown Current | ISD | 0.6 | 10 | μA | VSHUTDOWN = VDD | 5 | |
| Output Offset Voltage | VOS | 5 | 50 | mV | VIN = 0V | 5 | |
| Output Power | PO | 1 | 1.1 | W | THD = 1% (max); f = 1 kHz | 5 | |
| Total Harmonic Distortion + Noise (key specification) | THD+N | 1 | % | 1kHz at 1W continuous average output power into 8Ω | 2 | ||
| Temperature Range | TA | -40 | 85 | °C | TMIN ≤ TA ≤ TMAX | 4 | |
| Supply Voltage (absolute maximum) | VDD | 6 | V | 4 | |||
| Storage Temperature | TSTG | -65 | 150 | °C | 4 | ||
| Input Voltage | VIN | -0.3 | V | Upper limit printed as VDD + 0.3V | 4 | ||
| Junction Temperature | TJ | 150 | °C | 4 | |||
| Lead Temperature | 260 | °C | Soldering, 10 seconds | 4 | |||
| ESD Susceptibility (Human Body Model) | 3000 | V | Human body model, 100pF discharged through a 1.5kΩ resistor | 4 | |||
| ESD Susceptibility (Machine Model) | 250 | V | Machine model, 220pF-240pF discharged through all pins | 4 |
CAD (KiCad official)
- Symbol:
LM4861MM - Footprint:
Package_SO:MSOP-8_3x3mm_P0.65mm - 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files:
lm4861mm-etched.step/lm4861mm-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm4861mm.step/lm4861mm.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (17 pp, sha256
dc0b74bb23017914, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).