component
LM4819MX
Public Made by Adomby adom
Texas Instruments Audio Amplifiers, SOIC-8. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Contents
README
markdownLM4819MX
Texas Instruments · Audio Amplifiers · SOIC-8
LM4819MX from Texas Instruments, in a SOIC-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 micro-power shutdown control; drive to VDD (VSDIH ≥4.0 V at 5 V supply) to activate shutdown (ISD typ 0.7 µA, max 5.0 µA); drive to GND for normal operation; must not be left floating. |
| 2 | BYPASS | passive | Internal VDD/2 bias reference bypass pin; connect capacitor CB (≥1.0 µF recommended) from this pin to GND to stabilise the internal mid-supply reference and control turn-on ramp time (CB = 1.0 µF → TON ≈ 2 s). |
| 3 | +IN | input | Non-inverting audio input to the first internal amplifier; AC-coupled through Ci (sets −3 dB high-pass with Ri: fc = 1/(2πRiCi)); input voltage range −0.3 V to VDD +0.3 V. |
| 4 | -IN | input | Inverting input to the first internal amplifier; feedback resistor Rf is connected here to set differential closed-loop gain AVD = 2(Rf/Ri); input voltage range −0.3 V to VDD +0.3 V. |
| 5 | Vo1 | output | Bridge output 1 from the first internal amplifier; biased at VDD/2 quiescent; drives one terminal of the load differentially against Vo2 to deliver up to 350 mW RMS into 16 Ω (10% THD+N, VDD = 5 V). |
| 6 | VDD | power_in | Positive power supply; operating range 2.0 V to 5.5 V (abs max 6.0 V); quiescent current typ 1.5 mA (max 3.0 mA) at 5 V; bypass with 0.1 µF and 10 µF capacitors placed as close to the pin as possible. |
| 7 | GND | power_in | Ground reference for all internal circuitry; all voltages measured with respect to this pin. |
| 8 | Vo2 | output | Bridge output 2 from the second internal amplifier (gain set to −1 by two internal 20 kΩ resistors); 180° out of phase with Vo1; together with Vo1 produces differential swing across the load without an output coupling capacitor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-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 | 6 | V | 3 | ||||
| Storage Temperature | -65 | 150 | °C | 3 | |||
| Junction Temperature | TJ | 150 | °C | 3 | |||
| Input Voltage (upper limit VDD + 0.3V) | -0.3 | V | 3 | ||||
| ESD Susceptibility (human body model) | 3.5 | kV | Human body model, 100pF discharged through 1.5 kΩ | 3 | |||
| ESD Susceptibility (machine model) | 250 | V | Machine model, 220pF-240pF discharged through all pins | 3 | |||
| Operating Temperature Range | TA | -40 | 85 | °C | 3 | ||
| Supply Voltage | VCC | 2 | 5.5 | V | 3 | ||
| Shutdown Voltage Input High | VSDIH | 4 | V | VDD = 5V | 4 | ||
| Shutdown Voltage Input Low | VSDIL | 1 | V | VDD = 5V | 4 | ||
| Quiescent Power Supply Current | IDD | 1.5 | 3 | mA | VDD = 5V, RL = 16Ω; VIN = 0V, Io = 0A | 4 | |
| Shutdown Current | ISD | 1 | 5 | µA | VDD = 5V, RL = 16Ω; VPIN1 = VDD | 4 | |
| Output Offset Voltage | VOS | 5 | 50 | mV | VDD = 5V, RL = 16Ω; VIN = 0V | 4 | |
| Shutdown Voltage Input High | VSDIH | 2.4 | V | VDD = 3V | 4 | ||
| Shutdown Voltage Input Low | VSDIL | 0.6 | V | VDD = 3V | 4 | ||
| Quiescent Power Supply Current | IDD | 1 | 3 | mA | VDD = 3V, RL = 16Ω; VIN = 0V, Io = 0A | 4 | |
| Shutdown Current | ISD | 0.7 | 5 | µA | VDD = 3V, RL = 16Ω; VPIN1 = VDD | 4 | |
| Thermal Resistance junction-to-ambient (SOIC) | θJA | 170 | °C/W | Typical, board mounted, SOIC package | 3 | ||
| Thermal Resistance junction-to-case (SOIC) | θJC | 35 | °C/W | SOIC package | 3 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | (6) Machine Model, 220pF-240pF capacitor is discharged through all pins. (7) The given θJA is for an LM4819 package in an NGL0008B with the Exposed-DAP soldered to a printed circuit board copper pad w | 3 |
CAD (KiCad official)
- Symbol:
LM4819MX - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
lm4819mx-etched.step/lm4819mx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm4819mx.step/lm4819mx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (31 pp, sha256
c76a582050c5d98c, retrieved 2026-10-20, 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).