component
LP3943ISQX
Public Made by Adomby adom
Texas Instruments LED Drivers, WQFN-24-EP(4x4). 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
markdownLP3943ISQX
Texas Instruments · LED Drivers · WQFN-24-EP(4x4)
LP3943ISQX from Texas Instruments, in a WQFN-24-EP(4x4). 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 | LED0 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 2 | LED1 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 3 | LED2 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 4 | LED3 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 5 | LED4 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 6 | LED5 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 7 | LED6 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 8 | LED7 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 9 | GND | power_in | Ground reference |
| 10 | LED8 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 11 | LED9 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 12 | LED10 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 13 | LED11 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 14 | LED12 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 15 | LED13 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 16 | LED14 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 17 | LED15 | output | Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum |
| 18 | RST | input | Active-low reset input; hold LOW for minimum 10ns pulse width |
| 19 | SCL | input | I2C clock input; 400kHz maximum frequency |
| 20 | SDA | bidirectional | I2C serial data line; open-drain output capable for SMBus/I2C interface |
| 21 | VDD | power_in | Power supply input; 2.3V to 5.5V recommended operating range |
| 22 | A0 | input | I2C slave address input bit 0 for device address selection |
| 23 | A1 | input | I2C slave address input bit 1 for device address selection |
| 24 | A2 | input | I2C slave address input bit 2 for device address selection |
| 25 | Exposed Pad | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WQFN-24-EP(4x4) |
| Category | Nixie Tube Driver/LED Driver |
| Pins | 25 |
CAD (KiCad official)
- Symbol:
LP3943ISQX - Footprint:
Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm - 3D model: WQFN-24-EP(4x4) (KiCad packages3D, STEP)
- 3D model files:
lp3943isqx-etched.step/lp3943isqx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lp3943isqx.step/lp3943isqx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (26 pp, sha256
d6d0a0999dfdfaff, retrieved 2026-10-06, 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-4-5-20251001(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).