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5.3 × 5.0 mm 4 pins top-emitting

T77

5050 · smd · TCWIN T65 group · TCWIN

1-wire RGB 3–5.5 V active

At a glance

Colour
RGB8 bits per channel
Data
1-wiretimed pulses on one line
Supply
3–5.5 Vno backup data line
Size
5.3 × 5.0 × 1.5 mm4 pins · top
Max current
36 mA12 mA per channel
PWM
4 kHzreset 80 µs
Library support
FastLED WLED Adafruit

TCWIN T77: a 5050-class four-pad LED, 5.0 x 5.3 x 1.5 mm (0.1 mm narrower and thinner than the other 5050 drawings), 12 mA per channel (typical only), version A0 dated 2024-07-27. Pins 1 VDD, 2 DO, 3 GND, 4 DIN. Different drawing from every other 5050 TCWIN sheet (nine-pad back view, cross-shaped land pattern), so filed as its own part. The electrical and timing tables are the same as T65’s, including the doubtful T1L window and the logic-input absolute maximum printed as -0.5 to 0.5 V (see tcwin-t65-2017).

Variants

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

Order codeFaceLensWhite PinsSiliconStatusFirst seenDatasheet
T77 — — — 4 — active 2024-07-27 A0
LCSC stock 190 on 2026-10-15.

Pinout

T77
T77 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 in5.3 mm overall5.0 mmtop view1.5 mmside view
  • Power
  • Data
  • Ground
  • Pin 1
  • Cut corner

Outline and pin positions checked against the manufacturer datasheet (C48982530 T77 rev A0 p4). A different drawing from the other 5050 sheets: 5.3 mm across the leads, nine-pad back view, cross-shaped land pattern (3.6 mm between the inner pad edges, 3.17 mm vertical dimension). The 3.17 mm is read as a pad-centre spacing; approximate. What this means.

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

Protocol — TCWIN T65 group

Timings shown from datasheet.

TCWIN T65 group bit timingTCWIN T65 group bit timing: a zero bit is 300 nanoseconds high then 900 low; a one bit is 800 high then 900 low; reset 80 microseconds low1 · Bit encoding, to scaleDINhighlowbit 0 period 1200 nsbit 1 period 1700 nsT0H 300 nsT1H 800 nsT0L 900 nsT1L 900 ns"0" bit"1" bit025050075010001250150017502000225025002750time, nsDatasheet lists unequal bit periods (1200 vs 1700 ns); each bit is drawn with its own.2 · 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 × ~1700 ns ≈ 40.8 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 ≥ 80 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 800 / T1L 900 ns · reset 80 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.

  • 2024-07-27 datasheet revision TCWIN T77 specification cover: date 20240727, version A0 ↗ day
  • 2024-07-27 datasheet revision TCWIN T65 and T77 specification covers: date 20240727, version A0 ↗ 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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