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Contents

Pinout
Key specifications
CAD (KiCad official)
Provenance

README

markdown

TLC5943RHBR

Texas Instruments · LED Drivers · VQFN-32-EP(5x5)

TLC5943RHBR from Texas Instruments, in a VQFN-32-EP(5x5). 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	SCLK	input	Serial data shift clock for grayscale and brightness shift registers; Schmitt buffer input; data present on SIN are shifted into selected shift register with rising edge of SCLK.
2	SIN	input	Serial data input for grayscale and brightness control data; Schmitt buffer input.
3	BCSEL	input	Shift register and data latch select; Schmitt buffer input; low selects Grayscale register, high selects Brightness Control register; do not change while SCLK is high.
4	OUT0	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
5	OUT1	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
6	OUT2	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
7	OUT3	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
8	OUT4	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
9	OUT5	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
10	OUT6	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
11	OUT7	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
12	NC	unconnected	No internal connection.
13	NC	unconnected	No internal connection.
14	OUT8	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
15	OUT9	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
16	OUT10	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
17	OUT11	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
18	OUT12	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
19	OUT13	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
20	OUT14	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
21	OUT15	output	Constant current sink output; 50 mA maximum capability with 16-bit grayscale PWM control and 7-bit global brightness control.
22	XERR	output	Error output; open-drain output that goes low when LED Open Detection (LOD) or Thermal Error Flag (TEF) is detected.
23	SOUT	output	Serial data output connected to Grayscale/Status Information shift register or Brightness Control shift register selected by BCSEL.
24	GSCLK	input	Reference clock for Grayscale PWM control; Schmitt buffer input; 33 MHz maximum; each rising edge increments grayscale counter when BLANK is low.
25	XTEST	input	Factory test pin; must be connected to VCC or GND.
26	IREF	input	Reference current setting; connect external resistor between IREF and GND to set OUT0-OUT15 sink current value.
27	VCC	power_in	Power-supply voltage; operating range 3.0 V to 5.5 V.
28	NC	unconnected	No internal connection.
29	NC	unconnected	No internal connection.
30	GND	power_in	Power ground.
31	BLANK	input	Blank control (all constant current outputs off); Schmitt buffer input; high forces all outputs OFF and resets grayscale counter to 0.
32	XLAT	input	Latch control; low-to-high transition moves data from Grayscale and Brightness shift registers to respective first data latches.
33	EP	passive	Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	VQFN-32-EP(5x5)
Category	Nixie Tube Driver/LED Driver
Pins	33

CAD (KiCad official)

Symbol: TLC5943RHBR
Footprint: Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm
3D model: VQFN-32-EP(5x5) (KiCad packages3D, STEP)
3D model files: tlc5943rhbr-etched.step / tlc5943rhbr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tlc5943rhbr.step / tlc5943rhbr.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (43 pp, sha256 7fde582ec49e3d08, retrieved 2026-10-07, tier: lcsc)
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