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1.6 × 1.5 mm 4 pins top-emitting

CT-1615URGBC

1615 · smd · Chongtian M2 / M3 single-wire IC (0.3 / 0.9 us) · Chongtian

1-wire RGB 3.5–5.5 V active

Also sold as CT-1615, 1615RGB

At a glance

Colour
RGB8 bits per channel
Data
1-wiretimed pulses on one line
Supply
3.5–5.5 Vno backup data line
Size
1.6 × 1.5 × 0.6 mm4 pins · top
Max current
15 mA5 mA per channel
PWM
4.5 kHzreset 200 µs
Library support
FastLED WLED Adafruit

1.6 x 1.5 x 0.6 mm. Both SKUs use the 5 mA (M3) cell: supply 3.5-5.5 V, static 0.45 mA, VDS knee 0.7 V, in-chip current error under 1.5 percent. Datasheets disagree: the cover calls C52191311 ‘RGB’ while its data-order figure and note are GRB, and the C52191312 cover is ‘GRB’; the data-transfer diagram says reset >=80 us while the table says >200 us. The six-pin sibling CT-1615URGBC/HW-P6-MX1 (C52191314, stock 870) has no datasheet on LCSC and is not modelled. LCSC stock: C52191311 3,040, C52191312 980.

Variants

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

Order codeFaceLensWhite PinsSiliconStatusFirst seenDatasheet
CT-1615URGBC/HW-P6 — frosted — 4 — active 2026-01-23 A2A2 ↗
LCSC C52191311, stock 3,040. Frosted (‘H W’) resin.
CT-1615UGRBC/H-P6-5 — clear — 4 — active 2026-01-23 A2A2 ↗
LCSC C52191312, stock 980. Clear resin; ‘UGRBC’ in the name.

Pinout

CT-1615URGBC/HW-P6CT-1615UGRBC/H-P6-5
CT-1615URGBC 1615 package, top and side viewPin 1 is ringed. pin 1 DOUT (data out), pin 2 VDD (power), pin 3 DIN (data in), pin 4 GND (ground).11 DOUTdata out22 VDDpower33 DINdata in44 GNDground1.6 mm1.5 mmtop view0.6 mmside view
  • Data
  • Power
  • Ground
  • Pin 1
  • Polarity bar

Outline and pin positions checked against the manufacturer datasheet (C52191311 CT-1615URGBC/HW-P6 A2 p2-3). Half-moon pad cut-outs on the 1.5 mm edges are not drawn. Pins run clockwise from the top-left: 1 DOUT, 2 VDD, 3 DIN, 4 GND (circled numbers on the figure). 0.4 x 0.6 mm pads, 0.8 mm between columns and 0.25 mm between rows. A green bar at the left edge in the top view is the only mark. What this means.

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

Protocol — Chongtian M2 / M3 single-wire IC (0.3 / 0.9 us)

Timings shown from datasheet.

Chongtian M2 / M3 single-wire IC (0.3 / 0.9 us) bit timingChongtian M2 / M3 single-wire IC (0.3 / 0.9 us) 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 50 nanoseconds; reset 200 microseconds low1 · Bit encoding, to scaleDINhighlowbit 0 period 1200 nsbit 1 period 1200 nsT0H 300 ±50 nsT1H 900 ±50 nsT0L 900 ±50 nsT1L 300 ±50 ns"0" bit"1" bit020040060080010001200140016001800200022002400time, ns± tolerance on each falling edge2 · 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 · ±50 ns · period 1200 ns · reset 200 µs source: datasheet

Compatibility

  • protocol compatible SK6805

    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. 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.

  • 2022-09-14 datasheet revision Chongtian CT-3210URGBC/H-P15 specification, 'Version A0, date 2022.09.14' - the earliest Chongtian sheet read ↗ day
  • 2026-01-23 datasheet revision Chongtian CT-1615URGBC/HW-P6 specification, 'Version A2 date 2026/01/23' ↗ 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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