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3.7 × 3.5 mm 6 pins top-emitting

IN-PI33TCTPRPGPB

3537 · smd · Inolux PI dual-signal (single-trace IC with BIN) · Inolux Corporation

1-wire RGB 3.5–5.5 V backup data line active

Also sold as IN-PI33TC

At a glance

Colour
RGB8 bits per channel
Data
1-wiretimed pulses on one line
Supply
3.5–5.5 Vbackup data line
Size
3.7 × 3.5 × 1.1 mm6 pins · top
Max current
36 mA12 mA per channel
PWM
1.2 kHzreset 80 µs
Library support
FastLED WLED Adafruit

Datasheets disagree: the pin table lists pin 4 as ‘DOUT - Control data signal input’ (a second DOUT), while the pin figure on the same page and the ‘Dual-signal’ text make it DIN. Pin 6 is printed BIN in both. Treated as DIN. 3.7 x 3.5 x 1.1 mm (the title and description say 3.5 x 3.7; the drawing’s 3.700 is the horizontal axis). R/G/B port pressure 9 V, 12 mA, supply 3.5-5.5 V, ESD 4 kV. Timing T0H 0.2 / 0.32 / 0.4 us, T1H 0.62 / 0.64 / 1.0 us, reset >80 us. LCSC stock 0 on 2026-10-15.

Variants

One row per orderable SKU. Everything not listed is inherited from the part above.

Order codeFaceLensWhite PinsSiliconStatusFirst seenDatasheet
IN-PI33TCTPRPGPB — — — 6 — active 2018-12-13 1.1
LCSC C21615406, stock 0.

Pinout

IN-PI33TCTPRPGPB
IN-PI33TCTPRPGPB 3537 package, top and side viewPin 1 is ringed. pin 1 VCC (power), pin 2 VDD (power), pin 3 DOUT (data out), pin 4 DIN (data in), pin 5 GND (ground), pin 6 BIN (backup in).11 VCCpower22 VDDpower33 DOUTdata out44 DINdata in55 GNDground66 BINbackup in3.7 mm3.5 mmtop view1.1 mmside view
  • Power
  • Data
  • Ground
  • Backup data
  • Pin 1
  • Cut corner

Outline and pin positions checked against the manufacturer datasheet (C21615406 IN-PI33TCTPRPGPB v1.1 p1-2). Pads are 1.1 mm long on the right and about 2.0 mm long on the left in the bottom-view figure; a symmetric 1.1 x 0.5 mm pad is drawn. The 1.10 mm vertical pitch is read from the 2.20 mm callout. Pin 1 (VCC) is the bottom-right pad beside the 'C Angle' chamfer. What this means.

  1. 1 VCC power
  2. 2 VDD power
  3. 3 DOUT data out
  4. 4 DIN data in
  5. 5 GND ground
  6. 6 BIN backup data in

Protocol — Inolux PI dual-signal (single-trace IC with BIN)

Timings shown from datasheet.

Inolux PI dual-signal (single-trace IC with BIN) bit timingInolux PI dual-signal (single-trace IC with BIN) bit timing: a zero bit is 320 nanoseconds high then 800 low; a one bit is 640 high then 200 low; reset 80 microseconds low1 · Bit encoding, to scaleDINhighlowbit 0 period 1120 nsbit 1 period 840 nsT0H 320 nsT1H 640 nsT0L 800 nsT1L 200 ns"0" bit"1" bit020040060080010001200140016001800time, nsDatasheet lists unequal bit periods (1120 vs 840 ns); each bit is drawn with its own.2 · One frame: 24 bits, most-significant bit firstDIN170110010007100110101700101100bitch 1 · 8 bitsch 2 · 8 bitsch 3 · 8 bitsChannel order not recorded for this protocol · frame = 24 × ~1120 ns ≈ 26.9 µs · example data, first bits 1 0 1 …3 · RESET / latchlast bits of frame 1first bits of frame 2LEDs latch the data they receivedRESET: DIN low ≥ 80 µs (not to scale)4 · Cascade: each DOUT feeds the next DINMCULED 1DINDOUTLED 2DINDOUTLED NDINDOUTLED 1 keeps the first 24 bits, re-shapes the signal and sends the rest out on DOUT;LED 2 keeps the next 24, and so on. The last LED's DOUT is left unconnected.BIN (backup): tied to the previous pixel's DIN
T0H 320 / T0L 800 · T1H 640 / T1L 200 ns · reset 80 µs source: datasheet

Compatibility

Dating evidence

Nobody announces these parts, so this records what we can actually cite rather than a release date. Library support proves only that the part existed by that date.

  • 2018-12-13 datasheet revision Inolux IN-PI33TCTPRPGPB revision table: 'Initial Release 1.0 12-13-2018' ↗ day

Where to buy

Stub data — a few rows so purchase links can grow later. Prices are not tracked.

Similar parts

Same protocol or package first, then the same data scheme and colour channels.

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