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5.4 × 5.0 mm 4 pins top-emitting

T74

5050 · smd · TCWIN T74 / T75 · TCWIN

1-wire RGB 9–14 V active

At a glance

Colour
RGB8 bits per channel
Data
1-wiretimed pulses on one line
Supply
9–14 Vno backup data line
Size
5.4 × 5.0 × 1.6 mm4 pins · top
Max current
25.5 mA8.5 mA per channel
PWM
4 kHzreset 200 µs
Library support
FastLED WLED Adafruit

TCWIN T74: a 12 V built-in-IC LED in a four-pad 5050 package, 9-14 V supply (12 V typ), 8.5 mA per channel, cover rating 0.12 W, version A5 dated 2024-07-18. Pins 1 VDD, 2 DO, 3 GND, 4 DIN (same drawing as the 5 V 5050 parts, so the footprint does not tell 5 V and 12 V parts apart). Data order R, G, B; timing 0.3 / 0.9 / 0.9 / 0.3 us ±0.05 us, reset at least 200 us; propagation delay 70-80 ns; input thresholds high >= 2.3 V, low <= 1.9 V at VDD = 12 V; 0.23 mA static.

Variants

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

Order codeFaceLensWhite PinsSiliconStatusFirst seenDatasheet
T74 — — — 4 — active 2024-07-18 A5
LCSC stock 980 on 2026-10-15.

Pinout

T74
T74 5050 package, top and side viewPin 1 is ringed. pin 1 VDD (power), pin 2 DO (data out), pin 3 GND (ground), pin 4 DIN (data in).11 VDDpower22 DOdata out33 GNDground44 DINdata in5.4 mm overall5.0 mmtop view1.6 mmside view
  • Power
  • Data
  • Ground
  • Pin 1
  • Cut corner

Outline and pin positions checked against the manufacturer datasheet (C48982527 T74 rev A5 p4). Pin 1 is top-left, numbering runs counter-clockwise, and the chamfer sits at pin 3 (GND), as in the WS2812B. The sheet marks "+" on the pin 1-2 side and "-" on the pin 3-4 side. Pad sizes read from the drawing; the part spans 5.4 mm across the leads. What this means.

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

Protocol — TCWIN T74 / T75

Timings shown from datasheet.

TCWIN T74 / T75 bit timingTCWIN T74 / T75 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

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.

  • 2024-07-18 datasheet revision TCWIN T74 and T75 specification covers: date 20240718, version A5 ↗ 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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