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LP3943ISQX

Public Made by Adom

by adom

Texas Instruments LED Drivers, WQFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LP3943ISQX

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lp3943isqx.step / lp3943isqx.glb are 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, primary claude-haiku-4-5-20251001 (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