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size not recorded 6 pins top-emitting

WS2816-2121

2121 · smd · WS2816 · WorldSemi

1-wire RGB 3.3–5.5 V backup data line active

Also sold as WS2816 2121

At a glance

Colour
RGB16 bits per channel
Data
1-wiretimed pulses on one line
Supply
3.3–5.5 Vbackup data line
Size
—6 pins · top
Max current
—per-channel not recorded
PWM
10 kHzreset 280 µs
Library support
FastLED WLED Adafruit

Six-pad 2.1 mm 16-bit part, the earliest WS2816 package with a datasheet record (V1.0 2020-01-06).

Variants

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

Order codeFaceLensWhite PinsSiliconStatusFirst seenDatasheet
WS2816C-2121 — — — 6 — active 2020-01-06 PDF
Stock 990 when checked.
WS2816A-2121-V1-B — — — 6 V1 active 2020-01-06 PDFPDF ↗
The “A” version; port output current limit stated as 12 mA. Stock 3,395.

Pinout

WS2816C-2121WS2816A-2121-V1-B
WS2816-2121 2121 package, top and side viewPin 1 is ringed. pin 1 BI (backup in), pin 2 DI (data in), pin 3 VDD (power), pin 4 DO (data out), pin 5 BO (backup out), pin 6 GND (ground).11 BIbackup in22 DIdata in33 VDDpower44 DOdata out55 BObackup out66 GNDground2.1 mm2.1 mmtop view
  • Backup data
  • Data
  • Power
  • Ground
  • Pin 1

Outline and pin positions checked against the manufacturer datasheet (C965561 sheet p2). Cut corner not located in the sheet. Pad sizes and spacing are approximate. What this means.

  1. 1 BI backup data in
  2. 2 DI data in
  3. 3 VDD power
  4. 4 DO data out
  5. 5 BO backup data out
  6. 6 GND ground

Protocol — WS2816

Timings shown from datasheet.

WS2816 bit timingWS2816 bit timing: a zero bit is 260 nanoseconds high then 1000 low; a one bit is 660 high then 740 low; reset 280 microseconds low1 · Bit encoding, to scaleDINhighlowbit 0 period 1260 nsbit 1 period 1400 nsT0H 260 nsT1H 660 nsT0L 1000 nsT1L 740 ns"0" bit"1" bit02505007501000125015001750200022502500time, nsDatasheet lists unequal bit periods (1260 vs 1400 ns); each bit is drawn with its own.2 · One frame: 48 bits, most-significant bit firstDIN115011001010110010001510011010100110101150010110100101100bitch 1 · 16 bitsch 2 · 16 bitsch 3 · 16 bitsChannel order not recorded for this protocol · frame = 48 × ~1400 ns ≈ 67.2 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 ≥ 280 µs (not to scale)4 · Cascade: each DOUT feeds the next DINMCULED 1DINDOUTLED 2DINDOUTLED NDINDOUTLED 1 keeps the first 48 bits, re-shapes the signal and sends the rest out on DOUT;LED 2 keeps the next 48, and so on. The last LED's DOUT is left unconnected.BIN (backup): tied to the previous pixel's DIN
T0H 260 / T0L 1000 · T1H 660 / T1L 740 ns · reset 280 µs source: datasheet

Compatibility

  • electrically similar WS2813

    Both have a backup (breakpoint-resume) data line in the 6-pin and 6-pad packages, but the WS2816 frame is 48 bits per pixel against 24, so the data stream is not interchangeable. The 4-pin and 5-pin WS2816 variants have no backup input at all.

  • electrically similar of this WL-ICLED (48-bit, bypass pin)

    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.

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.

  • 2020-01-06 datasheet revision WorldSemi WS2816C-2121 datasheet (LCSC C965561) Modify Record: 'V1.0 N New-Official release 20200106' ↗ 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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