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3.2 × 1.0 mm 4 pins side-emitting

SK6805-EC3210R

3210 · smd · SK6805 · OPSCO Optoelectronics

1-wire RGB 3.7–5.5 V active

Also sold as SK6805-EC3210R

At a glance

Colour
RGB8 bits per channel
Data
1-wiretimed pulses on one line
Supply ≠
3.7–5.5 Vno backup data line
Size
3.2 × 1.0 × 1.5 mm4 pins · side
Max current
15 mA5 mA per channel
PWM ≠
1 kHzreset 200 µs
Library support
FastLED WLED Adafruit

Datasheets disagree

The sources we hold state different values for the facts below. Rather than pick one quietly, both sides are listed with where each was read. Check the datasheet for the exact part number and revision you are buying. How this is shown.

Protocol SK6805

PWM frequency

OPSCO’s SK6805 sheets give 1.0, 4 and 4.5 kHz depending on the package.

What each source says about pwm frequency
SourceSaysPage
sk6805-ec15-c2890035 1.0 kHz (EC15) 6
sk6805-ec10-c22394946 4 kHz (EC10) 6
sk6805-ec14-c2909055 4.5 kHz (EC14) 6

What we show. 1.0 kHz is shown. These may be different silicon revisions behind the same name; the part sheet for your package is the one to trust.

Protocol SK6812

Reset period

The 2015 sheet asks for 80 µs, the 2025 sheet for more than 200 µs.

What each source says about reset period
SourceSaysPage
sk6812 Trst 80 µs 5
sk6812-012-c5378720 Reset > 200 µs 7

What we show. Both datasheet sets are listed, the older first. Whether the silicon changed or only the documentation is not known; 200 µs or more satisfies both.

Bit timing

The one-bit split differs between sheets and FastLED.

What each source says about bit timing
SourceSaysPage
sk6812 T1H 600 ns, T1L 600 ns, each ±150 ns 5
sk6812-012-c5378720 T1H 650 ns–1 µs, T1L ≥ 200 ns 7
FastLED led_timing.h (driver-tuned) T1H 900 ns, T1L 300 ns —

What we show. All are listed in the timing table. Only a scope on a known reel settles which is true of the silicon.

PWM frequency

OPSCO gives 1.2, 1.0, 4 and 4.5 kHz for parts sold as SK6812.

What each source says about pwm frequency
SourceSaysPage
sk6812 1.2 kHz (rev 02, 2015) 4
sk6812-012-c5378720 1.0 kHz (rev B/1, 2025) 6
sk6812rv-f-c5378723 4 kHz (SK6812RV-F) 6
sk6812mini-ka-c7423120 4.5 kHz (SK6812MINI-KA) 5

What we show. 1.2 kHz is shown, from the sheet this protocol’s first timing set is read from. The variant sheets are different silicon or revisions.

Supply voltage

The 2015 sheet gives a lower minimum supply than the 2025 sheet.

What each source says about supply voltage
SourceSaysPage
sk6812 VDD +3.5 to +5.5 V 4
sk6812-012-c5378720 VDD 3.7 to 5.5 V 6

What we show. 3.7 V (the newer sheet) is shown because it is the safer minimum.

A thin side-mount package: 3.2 x 1.0 mm footprint with a semicircular lens (R1.0) that stands off the board, intended for side mounting (a dedicated side-mount pad layout is drawn). Pins in the top view: 1 GND top-left, 2 DOUT bottom-left, 3 DIN bottom-right, 4 VDD top-right.

Variants

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

Order codeFaceLensWhite PinsSiliconStatusFirst seenDatasheet
SK6805-EC3210R — — — 4 — active 2025-04-03 A1
Stock 20,902 when checked.
SK6812D-EC3210R — diffused — 4 — active 2025-04-03 A1PDF ↗
The 12 mA SK6812 IC with a foggy colloid, same pads and pin numbering. The sheet lists 3.2 x 1.0 x 1.08 mm. Stock 48,440.

Pinout

SK6805-EC3210RSK6812D-EC3210R
SK6805-EC3210R 3210 package, top and side viewPin 1 is ringed. pin 1 GND (ground), pin 2 DOUT (data out), pin 3 DIN (data in), pin 4 VDD (power).11 GNDground22 DOUTdata out33 DINdata in44 VDDpower3.2 mm1.0 mmtop view1.5 mmside view (end-on, light leaves the right face)
  • Ground
  • Data
  • Power
  • Pin 1

Outline and pin positions checked against the manufacturer datasheet (C5378735 sheet p4-5). Pad sizes and spacing are approximate. What this means.

  1. 1 GND ground
  2. 2 DOUT data out
  3. 3 DIN data in
  4. 4 VDD power

Protocol — SK6805

Timings shown from datasheet.

SK6805 bit timingSK6805 bit timing: a zero bit is 300 nanoseconds high then 900 low; a one bit is 900 high then 300 low; reset 200 microseconds low1 · Bit encoding, to scaleDINhighlowbit 0 period 1200 nsbit 1 period 1200 nsT0H 300 nsT1H 900 nsT0L 900 nsT1L 300 ns"0" bit"1" bit020040060080010001200140016001800200022002400time, ns2 · 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 × ~1200 ns ≈ 28.8 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 ≥ 200 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.
T0H 300 / T0L 900 · T1H 900 / T1L 300 ns · period 1200 ns · reset 200 µs source: datasheet

Compatibility

  • near clone SK6812

    The 5 mA sibling of the SK6812: the same single-wire framing and 4-pin GRB order, but 5 mA per channel instead of 12 mA, so a given brightness value is much dimmer, and a typical T1H of 900 ns against the SK6812's 700 ns. The part-number digits encode the drive current (6805 = 5 mA, 6812 = 12 mA). Not interchangeable for brightness. source ↗

  • protocol compatible of this ABOC BB single-wire IC (RGB order)

    Timing numbers only: T0H 300 / T0L 900 / T1H 900 / T1L 300 ns with windows 200-400 / 800- / 650-1000 / 200- and a 200 us reset are the numbers the sk6805 protocol records from the OPSCO EC-series sheets. The order differs (RGB here, GRB for SK6805), the drive is 12 mA (5 mA for SK6805) and the ABOC sheets never mention SK6805 or any other maker's IC.

  • protocol compatible of this Beking SID single-wire IC (5 mA class)

    The window table (T0H 0.2-0.4, T0L >=0.8, T1H 0.7-1.0, T1L >=0.2 us, reset 200 us, 5 mA class, GRB) is the min/typ/max shape of the OPSCO SK6805-EC sheets that the sk6805 protocol records; typical values 0.3 / 0.9 / 0.9 / 0.3 us. The Beking sheets never name SK6805.

  • protocol compatible of this Chongtian M2 / M3 single-wire IC (0.3 / 0.9 us)

    Same typical bit timing (T0H 300, T0L 900, T1H 900, T1L 300 ns), 800 kbps, GRB order and a 200 us reset as the sk6805 protocol records for the OPSCO 5 mA parts, with a +/-50 ns tolerance instead of min/max windows. Chongtian never names SK6805 or any other maker; the M3 variant is also a 5 mA part, but the M2 variant drives 12 mA.

  • electrically similar of this Meihua MHP1515 IC (unnamed)

    Inferred from the numbers only; the Meihua sheet never names OPSCO or any other IC. Its T0H 300 / T0L 900 / T1H 900 / T1L 300 ns (+/-50 ns) match the typical values OPSCO prints for the SK6805-EC15 (T0H 300, T0L 900, T1H 900, T1L 300), and Meihua resets after 200 us like the SK6805 sheet. But the pin numbering differs (Meihua 1 GND, 2 DO, 3 VDD, 4 DI; SK6805-EC15 1 DIN, 2 VDD, 3 DOUT, 4 GND), colour order is RGB here where OPSCO's SK6805 sends GRB, and the +/-50 ns tolerances are tighter than OPSCO's windows. Not tested.

  • electrically similar of this Nationstar FC-RGBC4020 IC (unnamed)

    Inferred from the numbers only; the Nationstar sheet never names OPSCO. Its typical timing (300 / 900 / 900 / 300 ns) and 200 us reset equal the typical figures printed for SK6805-EC15; the tolerance is +/-50 ns where OPSCO prints a wider window, supply is 4-5.5 V, and the output is 12 mA (SK6805: 5 mA).

  • electrically similar of this TONYU 6805

    Inferred from the part code and printed numbers only; the TONYU sheet never names OPSCO or SK6805. OPSCO's SK6805-EC15 sheet (T0H 200-400, T0L at least 700, T1H at least 700 ns, 0.5 mA static, 1 kHz PWM, 200 us reset) is close on bit timing, but TONYU resets after 80 us (not 200 us), PWM is 1.2 kHz and the quiescent current is 1 mA. The pad layout and pin numbering (1 DIN, 2 VDD, 3 DOUT, 4 GND) do match SK6805-EC15.

  • protocol compatible of this TX1812CXU

    The typical timing (300 / 900 / 900 / 300 ns, 200 us reset) equals the OPSCO SK6805-EC15 sheet figures recorded on the sk6805 protocol, with the same 24-bit GRB framing. The numbers coincide; neither sheet claims compatibility, the drive current is 11.5 mA here against 5 mA, and the +-50 ns tolerance is narrower than the SK6805 windows. Not measured.

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.

  • 2015-07-08 datasheet revision OPSCO SK6812 specification rev. 02, dated on its cover page ↗ day
  • 2015-10-02 first library support FastLED — first commit introducing SK6812 ↗ day
  • 2018-01-10 first library support WLED — first commit introducing SK6812 ↗ day
  • 2018-01-22 datasheet revision OPSCO SK6805MICRO-J datasheet (LCSC C2909056) revision table: 'A/0 2018-01-22 first issue' ↗ day
  • 2025-04-03 datasheet revision OPSCO SK6805-EC3210R datasheet revision table: first issue ↗ 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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