component
LM386BM-1
Public Made by Adomby adom
HGSEMI Audio Amplifiers, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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LM386BM-1
HGSEMI · Audio Amplifiers · SOP-8
LM386BM-1 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 | GAIN | passive | Gain-control pin: with pins 1 and 8 open the internal 1.35k resistor sets a voltage gain of 20 (26 dB), and a capacitor between pins 1 and 8 raises the gain to 200 (46 dB) while a series R-C between them gives any gain from 20 to 200. |
| 2 | IN- | input | Inverting input, referenced to ground through an internal 50k resistor, with input bias current of about 250 nA; the unused input must be bypassed to ground when operating at high gain to avoid gain loss or instability. |
| 3 | IN+ | input | Non-inverting input, referenced to ground through an internal 50k resistor, with input bias current of about 250 nA; the unused input must be bypassed to ground when operating at high gain to avoid gain loss or instability. |
| 4 | GND | power_in | Ground reference pin for the device, to which the inputs are referenced. |
| 5 | VOUT | output | Amplifier output, automatically biased to half the supply voltage, which drives the 8 Ω load (output power 250 mW min at Vcc=6 V and 500 mW min at Vcc=9 V at 10% THD). |
| 6 | Vs | power_in | Supply pin, operating range 4 V to 12 V, with an absolute maximum supply voltage of 15 V. |
| 7 | BYPASS | passive | Bypass pin whose external capacitor (10 µF in the datasheet test conditions) sets the supply ripple rejection (PSRR 50 dB typ at 1 kHz). |
| 8 | GAIN | passive | Gain-control pin paired with pin 1: with both pins open the gain is 20 (26 dB), and a capacitor between pins 1 and 8 bypasses the 1.35k resistor to raise the gain to 200 (46 dB). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOP-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 |
|---|---|---|---|---|---|---|---|
| Operating supply voltage | Vcc | 4 | 12 | V | 4 | ||
| Static supply current | Icc | 4 | 8 | mA | Vcc=6V, VIN=0 | 4 | |
| Output power | Po | 250 | 325 | mW | Vcc=6V, RL=8Ω, THD=10% | 4 | |
| Output power | Po | 500 | 700 | mW | Vcc=9V, RL=8Ω, THD=10% | 4 | |
| Max input voltage | VIN | -0.4 | 0.4 | V | 3 | ||
| Supply voltage | Vcc | 15 | V | 3 | |||
| Maximum allowable power dissipation | PD | 660 | mW | 3 | |||
| Soldering temperature | Ts | 260 | ℃ | 10 s | 3 | ||
| Junction temperature | Tj | 150 | ℃ | 3 | |||
| Operating temperature | Tamb | 0 | 70 | ℃ | 3 | ||
| Storage temperature | Tstg | -40 | 125 | ℃ | 3 | ||
| Voltage gain | Av | 26 | dB | Vcc=6V, f=1kHz, pins 1 and 8 open | 4 | ||
| Voltage gain with 10μF between pins 1 and 8 | Av | 46 | dB | Vcc=6V, f=1kHz, 10μF capacitor between pins 1 and 8 | 4 | ||
| Bandwidth | BW | 300 | kHz | Vcc=6V, pins 1 and 8 open | 4 | ||
| Total harmonic distortion | THD | 0.2 | % | Vcc=6V, RL=8Ω, Po=125mW, f=1kHz, pins 1 and 8 open | 4 | ||
| Power supply ripple rejection ratio | PSRR | 50 | dB | Vcc=6V, f=1kHz, CBYPASS=10μF, pins 1 and 8 open, output referenced | 4 | ||
| Input resistance | RIN | 50 | kΩ | 4 | |||
| Input bias current | IB | 250 | nA | Vcc=6V, pins 2 and 3 open | 4 |
CAD (KiCad official)
- Symbol:
LM386BM-1 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
lm386bm-1-etched.step/lm386bm-1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm386bm-1.step/lm386bm-1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (10 pp, sha256
3500d8afa6a2f178, retrieved 2026-10-18, 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).
# LM386BM-1
**HGSEMI** · Audio Amplifiers · SOP-8
LM386BM-1 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 | GAIN | passive | Gain-control pin: with pins 1 and 8 open the internal 1.35k resistor sets a voltage gain of 20 (26 dB), and a capacitor between pins 1 and 8 raises the gain to 200 (46 dB) while a series R-C between them gives any gain from 20 to 200. |
| 2 | IN- | input | Inverting input, referenced to ground through an internal 50k resistor, with input bias current of about 250 nA; the unused input must be bypassed to ground when operating at high gain to avoid gain loss or instability. |
| 3 | IN+ | input | Non-inverting input, referenced to ground through an internal 50k resistor, with input bias current of about 250 nA; the unused input must be bypassed to ground when operating at high gain to avoid gain loss or instability. |
| 4 | GND | power_in | Ground reference pin for the device, to which the inputs are referenced. |
| 5 | VOUT | output | Amplifier output, automatically biased to half the supply voltage, which drives the 8 Ω load (output power 250 mW min at Vcc=6 V and 500 mW min at Vcc=9 V at 10% THD). |
| 6 | Vs | power_in | Supply pin, operating range 4 V to 12 V, with an absolute maximum supply voltage of 15 V. |
| 7 | BYPASS | passive | Bypass pin whose external capacitor (10 µF in the datasheet test conditions) sets the supply ripple rejection (PSRR 50 dB typ at 1 kHz). |
| 8 | GAIN | passive | Gain-control pin paired with pin 1: with both pins open the gain is 20 (26 dB), and a capacitor between pins 1 and 8 bypasses the 1.35k resistor to raise the gain to 200 (46 dB). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOP-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 |
|---|---|---|---|---|---|---|---|
| Operating supply voltage | Vcc | 4 | | 12 | V | | 4 |
| Static supply current | Icc | | 4 | 8 | mA | Vcc=6V, VIN=0 | 4 |
| Output power | Po | 250 | 325 | | mW | Vcc=6V, RL=8Ω, THD=10% | 4 |
| Output power | Po | 500 | 700 | | mW | Vcc=9V, RL=8Ω, THD=10% | 4 |
| Max input voltage | VIN | -0.4 | | 0.4 | V | | 3 |
| Supply voltage | Vcc | | | 15 | V | | 3 |
| Maximum allowable power dissipation | PD | | | 660 | mW | | 3 |
| Soldering temperature | Ts | | | 260 | ℃ | 10 s | 3 |
| Junction temperature | Tj | | | 150 | ℃ | | 3 |
| Operating temperature | Tamb | 0 | | 70 | ℃ | | 3 |
| Storage temperature | Tstg | -40 | | 125 | ℃ | | 3 |
| Voltage gain | Av | | 26 | | dB | Vcc=6V, f=1kHz, pins 1 and 8 open | 4 |
| Voltage gain with 10μF between pins 1 and 8 | Av | | 46 | | dB | Vcc=6V, f=1kHz, 10μF capacitor between pins 1 and 8 | 4 |
| Bandwidth | BW | | 300 | | kHz | Vcc=6V, pins 1 and 8 open | 4 |
| Total harmonic distortion | THD | | 0.2 | | % | Vcc=6V, RL=8Ω, Po=125mW, f=1kHz, pins 1 and 8 open | 4 |
| Power supply ripple rejection ratio | PSRR | | 50 | | dB | Vcc=6V, f=1kHz, CBYPASS=10μF, pins 1 and 8 open, output referenced | 4 |
| Input resistance | RIN | | 50 | | kΩ | | 4 |
| Input bias current | IB | | 250 | | nA | Vcc=6V, pins 2 and 3 open | 4 |
## CAD (KiCad official)
- Symbol: `LM386BM-1`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `lm386bm-1-etched.step` / `lm386bm-1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm386bm-1.step` / `lm386bm-1.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [HGSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758141740933505024) (10 pp, sha256 `3500d8afa6a2f178`, retrieved 2026-10-18, 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`, primary `claude-haiku-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/lm386bm-1-datasheet.pdf)