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TLC5947RHBT

Public Made by Adom

by adom

Texas Instruments LED Drivers, VQFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Contents

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TLC5947RHBT

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

TLC5947RHBT 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 OUT0 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
2 OUT1 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
3 OUT2 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
4 OUT3 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
5 OUT4 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
6 OUT5 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
7 OUT6 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
8 OUT7 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
9 OUT8 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
10 OUT9 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
11 OUT10 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
12 OUT11 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
13 OUT12 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
14 OUT13 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
15 OUT14 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
16 OUT15 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
17 OUT16 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
18 OUT17 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
19 OUT18 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
20 OUT19 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
21 OUT20 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
22 OUT21 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
23 OUT22 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
24 OUT23 output Constant-current LED sink output; current level set by IREF resistor for all channels; on/off timing controlled by individual 12-bit grayscale data.
25 SOUT output Serial data output connected to grayscale shift register MSB; data valid at SCLK falling edge, reduces timing errors.
26 XLAT input Grayscale latch strobe input; rising edge transfers shift register data to output latch and forces outputs off until next display period.
27 IREF bidirectional Current reference input; set constant-current output level (2-30 mA range) via external resistor connected between IREF and GND.
28 VCC power_in Power supply input; 3.0 V to 5.5 V nominal; 0.1 µF ceramic bypass capacitor required close to pin.
29 GND power_in Power ground; connect to device ground plane.
30 BLANK input Active-high output disable control; when high, forces all 24 outputs off and resets grayscale counter to zero.
31 SCLK input Serial shift clock input (Schmitt trigger); data on SIN shifted into register on rising edge; minimum pulse widths 12 ns high, 10 ns low.
32 SIN input Serial input for 288-bit grayscale data (24 channels × 12 bits); setup time 5 ns minimum before SCLK rising edge.
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 LED Drivers
Pins 33

CAD (KiCad official)

  • Symbol: TLC5947RHBT
  • 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: tlc5947rhbt-etched.step / tlc5947rhbt-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tlc5947rhbt.step / tlc5947rhbt.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (39 pp, sha256 5212c127bb5e5230, retrieved 2026-09-25, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (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