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TCWIN T78

1-wire RGB · TCWIN · tx18xx

Channels
RGB
Bits / channel
8
Supply
3.5–5.5 V
PWM
4 kHz
Backup data
no
Packages
1

TCWIN T-code sheets (headed “RGB LED (built-in IC)”, “Type Txx”) give no IC name or “naming principle” beyond the code itself. This protocol is the group of T-codes whose printed tables are identical; the sheets do not say the parts share one die. The only TCWIN sheet with a 16.5 mA drive. Single 5050 four-pad part with GND and DO swapped relative to the other four-pad 5050 sheets.

Refresh & flicker

16.5 mA per channel (15-18), 5 V supply, data rate 800 kHz typical, 4 kHz PWM, DO source/sink only 8 mA, 1 mA static.

Timing

TCWIN T78 bit timingTCWIN T78 bit timing: a zero bit is 300 nanoseconds high then 900 low; a one bit is 900 high then 300 low; reset 80 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 ≥ 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 900 / T1L 300 ns · period 1200 ns · reset 80 µs source: datasheet
SourceT0HT0LT1HT1LPeriodRateReset±
datasheet ↗ 300 ns 900 ns 900 ns 300 ns 1200 ns 833 kHz 80 µs —
Min/typ/max: T0H 250/300/350 ns, T0L 800/900/1000 ns, T1H 800/900/1000 ns, T1L 250/300/350 ns, reset at least 80 us.

Library support

Not checked against FastLED’s chipset list or the other libraries’ source.

Parts using this protocol

Dating evidence

Evidence, not a release date. A library commit proves the part existed by that date and says nothing about how long before.

  • 2024-08-29 datasheet revision TCWIN T78 specification cover: date 20240829, version A5 ↗ day