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2.2 × 2.2 mm 6 pins top-emitting

WL-ICLED 1312121320437

2222 · smd · WL-ICLED (48-bit, bypass pin) · Wurth Elektronik

1-wire RGB 4.2–5.5 V backup data line active

Also sold as 1312121320437

At a glance

Colour
RGB12 bits per channel
Data
1-wiretimed pulses on one line
Supply
4.2–5.5 Vbackup data line
Size
2.2 × 2.2 × 1.1 mm6 pins · top
Max current
—per-channel not recorded
PWM
600 Hzreset 50 µs
Library support
FastLED WLED Adafruit

The odd one in the family: 48 bits per pixel, with a 12-bit PWM value and a separate 4-bit current gain for each of red, green and blue, red first. At 600 Hz PWM it is a part to check on camera before putting it in a product. Two VDD pads (1 and 6), VSS, DOUT and DIN; pin 4 is a “BI” input the sheet calls Bypass. The sheet does not say what BI does, so it is recorded as a backup input only by analogy with the WS2813 and should not be relied on.

Variants

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

Order codeFaceLensWhite PinsSiliconStatusFirst seenDatasheet
1312121320437 white diffused — 6 — active 2024-04-26 002.002
White housing, diffused lens (“PLCC6 Top view”), MSL 5a.

Pinout

1312121320437
WL-ICLED 1312121320437 2222 package, top and side viewPin 1 is ringed. pin 1 VDD (power), pin 2 VSS (ground), pin 3 DOUT (data out), pin 4 BI (backup in), pin 5 DIN (data in), pin 6 VDD (power).11 VDDpower22 VSSground33 DOUTdata out44 BIbackup in55 DINdata in66 VDDpower2.3 mm overall2.2 mmtop view1.1 mmside view
  • Power
  • Ground
  • Data
  • Backup data
  • Pin 1
  • Cut corner

Outline and pin positions checked against the manufacturer datasheet (Wurth 1312121320437 sheet p1: pin 1 top-left at the cut corner, 1-2-3 down the left, 4-5-6 up the right). Pad sizes and pitches are read from the land-pattern callouts and are approximate. What this means.

  1. 1 VDD power
  2. 2 VSS ground
  3. 3 DOUT data out
  4. 4 BI backup data in
  5. 5 DIN data in
  6. 6 VDD power

Protocol — WL-ICLED (48-bit, bypass pin)

Timings shown from datasheet.

WL-ICLED (48-bit, bypass pin) bit timingWL-ICLED (48-bit, bypass pin) bit timing: a zero bit is 300 nanoseconds high then 900 low; a one bit is 900 high then 300 low; tolerance plus or minus 80 nanoseconds; reset 50 microseconds low1 · Bit encoding, to scaleDINhighlowbit 0 period 1200 nsbit 1 period 1200 nsT0H 300 ±80 nsT1H 900 ±80 nsT0L 900 ±80 nsT1L 300 ±80 ns"0" bit"1" bit020040060080010001200140016001800200022002400time, ns± tolerance on each falling edge2 · One frame: 36 bits, most-significant bit firstDIN011010101100100111101010011010011110100101100bitch 1 · 12 bitsch 2 · 12 bitsch 3 · 12 bitsChannel order not recorded for this protocol · frame = 36 × ~1200 ns ≈ 43.2 µs · example data, first bits 0 0 1 …3 · RESET / latchlast bits of frame 1first bits of frame 2LEDs latch the data they receivedRESET: DIN low ≥ 50 µs (not to scale)4 · Cascade: each DOUT feeds the next DINMCULED 1DINDOUTLED 2DINDOUTLED NDINDOUTLED 1 keeps the first 36 bits, re-shapes the signal and sends the rest out on DOUT;LED 2 keeps the next 36, and so on. The last LED's DOUT is left unconnected.BIN (backup): tied to the previous pixel's DIN
T0H 300 / T0L 900 · T1H 900 / T1L 300 ns · ±80 ns · period 1200 ns · reset 50 µs source: datasheet

Compatibility

  • electrically similar WS2816

    Both are 6-pin single-wire parts with a second input and 12-16 bit channels, but the WS2816 frame is 16-bit per channel with its own backup semantics and this sheet specifies 12-bit PWM plus a 4-bit current gain. Not interchangeable on the wire. source ↗

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.

  • 2024-04-26 datasheet revision Wurth WL-ICLED 1312121320437 datasheet, revision 002.002 ↗ day

Similar parts

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

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