component
LM4890MX
Public Made by Adomby adom
Texas Instruments Audio Amplifiers, SOIC-8. Datasheet-verified pinout, 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
markdownLM4890MX
Texas Instruments · Audio Amplifiers · SOIC-8
LM4890MX from Texas Instruments, in a SOIC-8. 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 | SHUTDOWN | input | Active-low shutdown control input: driving this pin to a logic low (VSDIL ≤ 0.4V max) puts the device into ultra-low-power shutdown (ISD = 0.1µA typ, 2.0µA max), while a logic high (VSDIH ≥ 1.2V min) enables normal operation; wake-up time is 170ms typ/220ms max at VDD=5V. |
| 2 | BYPASS | passive | Half-supply bypass node; an external capacitor (CBYPASS, recommended 1.0µF) connected from this pin to ground filters the internal half-supply reference to improve PSRR and minimize turn-on/turn-off pop noise. |
| 3 | +IN | input | Non-inverting audio input of internal amplifier A1, part of the differential input pair used to set closed-loop gain with the external RIN/Rf network; input voltage range is -0.3V to VDD+0.3V per Absolute Maximum Ratings. |
| 4 | -IN | input | Inverting audio input of internal amplifier A1; connects through external RIN and CIN to the audio source and receives feedback through Rf, setting the differential closed-loop gain AVD = 2*(Rf/RIN). |
| 5 | Vo1 | output | BTL (bridge-tied load) amplifier output 1; together with Vo2 drives the load (typically 8Ω) differentially, delivering up to 1W typ at VDD=5V/1%THD without requiring output coupling, snubber, or bootstrap capacitors. |
| 6 | VDD | power_in | Positive power supply input; operating range is 2.2V to 5.5V (absolute maximum 6.0V), with quiescent supply current IDD typically 4mA (8mA max, no load) at VDD=5V. |
| 7 | GND | power_in | Ground reference pin; all device voltages are measured with respect to this pin. |
| 8 | Vo2 | output | BTL amplifier output 2, driven by the internally fixed unity-gain inverting amplifier A2 (set by two internal 20kΩ resistors); together with Vo1 drives the load differentially 180° out of phase. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM4890MX - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
lm4890mx-etched.step/lm4890mx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm4890mx.step/lm4890mx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (40 pp, sha256
13ec1db10db71b3a, retrieved 2026-09-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-sonnet-5(text+vision), consensusclaude-opus-4-8(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).