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3.5 × 3.5 mm 4 pins top-emitting

XL-3535UWC-2812B

3535 · smd · Xinglight 2812B white/yellow (3.5-7.5 V, 12 mA, 0.295/0.595 us table) · Xinglight

1-wire W 3.5–7.5 V active

Also sold as XL-3535UWC-WS2812B

At a glance

Colour
W8 bits per channel
Data
1-wiretimed pulses on one line
Supply
3.5–7.5 Vno backup data line
Size
3.5 × 3.5 × 0.9 mm4 pins · top
Max current
36 mA12 mA per channel
PWM
4 kHzreset 80 µs
Library support
FastLED WLED Adafruit

Datasheets disagree with themselves on pin order: the table is 1 VDD, 2 DI, 3 DO, 4 GND but the labelled drawing places DOUT and VDD on the top edge and GND and DIN on the bottom edge, so neither a clockwise nor a counter-clockwise walk from VDD gives the table numbers.

Variants

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

Order codeFaceLensWhite PinsSiliconStatusFirst seenDatasheet
XL-3535UWC-2812B — — — 4 — active 2025-10-15 PDF
Not in the original scope list; found by a keyword search of the LCSC sweep. White-only pixel. LCSC stock 2,220 on 2026-10-15.

Pinout

XL-3535UWC-2812B
XL-3535UWC-2812B 3535 package, top and side viewPin 1 is ringed. pin 1 VDD (power), pin 2 DI (data in), pin 3 DO (data out), pin 4 GND (ground).11 VDDpower22 DIdata in33 DOdata out44 GNDground3.5 mm3.5 mmtop view1 mmside view
  • Power
  • Data
  • Ground
  • Pin 1

Outline and pin positions checked against the manufacturer datasheet (C51900947 XL-3535UWC-WS2812B p10 (outline, solder pattern, labelled diagram)). Pin table 1 VDD, 2 DI, 3 DO, 4 GND; the labelled diagram has DOUT top-left, VDD top-right, GND bottom-left, DIN bottom-right, which is not a ring from VDD. Pads are placed by the labels. Pad widths are read from the drawing (an asymmetric 3535 pattern, long pads top-right and bottom-left); the sheet shows no cut corner or pin-1 mark. What this means.

  1. 1 VDD power
  2. 2 DI data in
  3. 3 DO data out
  4. 4 GND ground

Protocol — Xinglight 2812B white/yellow (3.5-7.5 V, 12 mA, 0.295/0.595 us table)

Timings shown from datasheet.

Xinglight 2812B white/yellow (3.5-7.5 V, 12 mA, 0.295/0.595 us table) bit timingXinglight 2812B white/yellow (3.5-7.5 V, 12 mA, 0.295/0.595 us table) bit timing: a zero bit is 295 nanoseconds high then 595 low; a one bit is 595 high then 295 low; reset 80 microseconds low1 · Bit encoding, to scaleDINhighlowbit 0 period 890 nsbit 1 period 890 nsT0H 295 nsT1H 595 nsT0L 595 nsT1L 295 ns"0" bit"1" bit02004006008001000120014001600time, ns2 · One frame: 8 bits, most-significant bit firstDIN1701100100bitch 1 · 8 bitsChannel order not recorded for this protocol · frame = 8 × ~890 ns ≈ 7.1 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 8 bits, re-shapes the signal and sends the rest out on DOUT;LED 2 keeps the next 8, and so on. The last LED's DOUT is left unconnected.
T0H 295 / T0L 595 · T1H 595 / T1L 295 ns · period 890 ns · reset 80 µs source: datasheet

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.

  • 2025-10-15 estimate PDF CreationDate metadata of Xinglight sheet XL-3535UWC-2812B (LCSC C51900947); the sheet has no revision table, so this is only the date the PDF file was produced ↗ 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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