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3.7 × 3.5 mm 4 pins top-emitting

L993L-QEPGBC-3I

3535 · smd · AOP single-wire IC (high speed mode, 280 us reset) · American Opto Plus LED

1-wire RGB 3.3–5.5 V active

Also sold as L993L-QEPGBC

At a glance

Colour
RGB8 bits per channel
Data
1-wiretimed pulses on one line
Supply
3.3–5.5 Vno backup data line
Size
3.7 × 3.5 × 1.9 mm4 pins · top
Max current
36 mA12 mA per channel
PWM
—reset 280 µs
Library support
FastLED WLED Adafruit

The 280 us-reset version of the AOP 3535 (see aop-hs). Absolute maximum VDD 6.0 V, output 20 mA, -40 to +85 C; 500 pcs per 7 inch reel. LCSC lists it as ‘SMD-4P,3.7x3.5mm’; stock 0 on 2026-10-15.

Variants

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

Order codeFaceLensWhite PinsSiliconStatusFirst seenDatasheet
L993L-QEPGBC-3I — clear — 4 — active 2020-08-18 1.0
LCSC C6651229, stock 0.

Pinout

L993L-QEPGBC-3I
L993L-QEPGBC-3I 3535 package, top and side viewPin 1 is ringed. pin 1 VDD (power), pin 2 DOUT (data out), pin 3 VSS (ground), pin 4 DIN (data in).11 VDDpower22 DOUTdata out33 VSSground44 DINdata in3.7 mm3.5 mmtop view2 mmside view
  • Power
  • Data
  • Ground
  • Pin 1
  • Cut corner

Outline and pin positions checked against the manufacturer datasheet (C6651229 L993L-QEPGBC-3I v1.0 p1-2). Same drawing as the L993L-LEPGBC-3I: 1 VDD top-left, 2 DOUT bottom-left, 3 VSS bottom-right (cut corner), 4 DIN top-right; 3.68 x 3.48 mm. What this means.

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

Protocol — AOP single-wire IC (high speed mode, 280 us reset)

Timings shown from datasheet.

AOP single-wire IC (high speed mode, 280 us reset) bit timingAOP single-wire IC (high speed mode, 280 us reset) bit timing: a zero bit is 300 nanoseconds high then 790 low; a one bit is 790 high then 610 low; reset 280 microseconds low1 · Bit encoding, to scaleDINhighlowbit 0 period 1090 nsbit 1 period 1400 nsT0H 300 nsT1H 790 nsT0L 790 nsT1L 610 ns"0" bit"1" bit0250500750100012501500175020002250time, nsDatasheet lists unequal bit periods (1090 vs 1400 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 × ~1400 ns ≈ 33.6 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 ≥ 280 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 790 · T1H 790 / T1L 610 ns · reset 280 µs source: datasheet

Compatibility

  • protocol compatible WS2812B-V5

    T0H 220-380 ns, T0L 580-1000 ns, T1H 580-1000 ns and a 280 us reset are the windows the ws2812b-v5 protocol records; the AOP T1L window is wider (0.22-1.0 us against 580 ns-1 us). The sheets never mention WorldSemi. 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.

  • 2020-08-18 datasheet revision American Opto Plus L993L-QEPGBC-3I data sheet, 'Version 1.0 Date: 08-18-2020' ↗ 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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