# LME49743MTX

**Texas Instruments** · Audio Power OpAmps · TSSOP-14

LME49743MTX from Texas Instruments, in a TSSOP-14. 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 | OUT1 | output | Output of amplifier 1, able to drive 600Ω loads with ±21mA output current and continuous short-circuit protection. |
| 2 | IN1- | input | Inverting input of amplifier 1, with input voltage limited to (V-) - 0.7V to (V+) + 0.7V. |
| 3 | IN1+ | input | Non-inverting input of amplifier 1, with input voltage limited to (V-) - 0.7V to (V+) + 0.7V. |
| 4 | V+ | power_in | Positive supply; total supply voltage VS = V+ - V- is ±4.0V to ±17V operating, 36V absolute maximum. |
| 5 | IN2+ | input | Non-inverting input of amplifier 2, with input voltage limited to (V-) - 0.7V to (V+) + 0.7V. |
| 6 | IN2- | input | Inverting input of amplifier 2, with input voltage limited to (V-) - 0.7V to (V+) + 0.7V. |
| 7 | OUT2 | output | Output of amplifier 2, able to drive 600Ω loads with ±21mA output current and continuous short-circuit protection. |
| 8 | OUT3 | output | Output of amplifier 3, able to drive 600Ω loads with ±21mA output current and continuous short-circuit protection. |
| 9 | IN3- | input | Inverting input of amplifier 3, with input voltage limited to (V-) - 0.7V to (V+) + 0.7V. |
| 10 | IN3+ | input | Non-inverting input of amplifier 3, with input voltage limited to (V-) - 0.7V to (V+) + 0.7V. |
| 11 | V- | power_in | Negative supply; total supply voltage VS = V+ - V- is ±4.0V to ±17V operating, 36V absolute maximum. |
| 12 | IN4+ | input | Non-inverting input of amplifier 4, with input voltage limited to (V-) - 0.7V to (V+) + 0.7V. |
| 13 | IN4- | input | Inverting input of amplifier 4, with input voltage limited to (V-) - 0.7V to (V+) + 0.7V. |
| 14 | OUT4 | output | Output of amplifier 4, able to drive 600Ω loads with ±21mA output current and continuous short-circuit protection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-14 |
| Category | Operational Amplifier/Comparator |
| Pins | 14 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Total Harmonic Distortion + Noise | THD+N |  | 0.0001 | 0.0002 | % | AV = 1, VOUT = 3VRMS, RL = 600Ω | 3 |
| Intermodulation Distortion | IMD |  |  | 0.0005 | % | AV = 1, VOUT = 3VRMS, two-tone 60Hz & 7kHz 4:1 | 3 |
| Gain Bandwidth Product | GBWP | 25 | 30 |  | MHz |  | 3 |
| Slew Rate | SR | 9.5 | 12 |  | V/μs |  | 3 |
| Equivalent Input Noise Voltage | en |  | 0.48 | 0.65 | μVRMS | fBW = 20Hz to 20kHz | 3 |
| Equivalent Input Noise Density | en |  | 3.5 | 4.5 | nV/√Hz | f = 1kHz | 3 |
| Offset Voltage | VOS | -1 | 0.15 | 1 | mV |  | 3 |
| Average Input Offset Voltage Shift vs Power Supply Voltage | PSRR | 94 | 98 |  | dB | ΔVS = 20V | 3 |
| Input Bias Current | IB |  | 190 | 250 | nA | VCM = 0V | 3 |
| Input Offset Current | IOS |  | 7 | 40 | nA | VCM = 0V | 3 |
| Common-Mode Rejection | CMRR | 98 | 106 |  | dB | -10V<VCM<10V | 3 |
| Open Loop Voltage Gain | AVOL | 110 |  |  | dB | -10V<VOUT<10V, RL = 600Ω | 3 |
| Open Loop Voltage Gain | AVOL | 100 | 110 |  | dB | -10V<VOUT<10V, RL = 10kΩ | 3 |
| Maximum Output Voltage Swing | VOUTMAX | -12 | 12.4 |  | V | RL = 600Ω | 3 |
| Maximum Output Voltage Swing | VOUTMAX | -13 |  |  | V | RL = 2kΩ | 3 |
| Output Current | IOUT | -20 | 21 |  | mA | RL = 600Ω, VS = ±17V | 3 |
| Total Quiescent Current | IS |  | 10 | 14 | mA | IOUT = 0mA | 4 |
| Power Supply Voltage | VS |  |  | 36 | V | VS = V+ - V- | 2 |
| Storage Temperature |  | -65 |  | 150 | °C |  | 2 |
| Junction Temperature |  |  |  | 150 | °C |  | 2 |
| ESD Susceptibility (Human Body Model) |  |  |  | 750 | V | Human body model, 100pF discharged through 1.5kΩ | 2 |
| ESD Susceptibility (Machine Model) |  |  |  | 175 | V | Machine model, 200pF | 2 |
| Supply Voltage Range | VS | 4 |  | 17 | V |  | 2 |
| Temperature Range | TA | -40 |  | 85 | °C | TMIN ≤ TA ≤ TMAX | 2 |
| Thermal Resistance Junction-to-Ambient | θJA |  | 140 |  | °C/W | Package MT (TSSOP) | 2 |

## CAD (KiCad official)

- Symbol: `LME49743MTX`
- Footprint: `Package_SO:TSSOP-14_4.4x5mm_P0.65mm`
- 3D model: TSSOP-14 (KiCad packages3D, STEP)
- 3D model files: `lme49743mtx-etched.step` / `lme49743mtx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lme49743mtx.step` / `lme49743mtx.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lme49743) (25 pp, sha256 `284f797fea5372e3`, retrieved 2026-10-31, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-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).

[Datasheet PDF](docs/lme49743mtx-datasheet.pdf)