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1.3 × 1.3 mm 4 pins top-emitting

LTST-E133CEGBK

1313 · smd · Lite-On embedded single-wire IC (LTST series) · Lite-On

1-wire RGB 4.2–5.5 V active

Also sold as LTST-E133

At a glance

Colour
RGB8 bits per channel
Data
1-wiretimed pulses on one line
Supply
4.2–5.5 Vno backup data line
Size
1.3 × 1.3 × — mm4 pins · top
Max current
15 mA5 mA per channel
PWM
—reset 50 µs
Library support
FastLED WLED Adafruit

1.3 x 1.3 mm, listed by LCSC as ‘0505’ (inch). IC working current 0.8 mA with all-zero data, IC supply 4.2-5.5 V, operating -20 to +85 C (‘needs a good heat sink to keep the pad temperature under 85 C’), 8 mm tape. The side-view dimension ‘0.40’ is ambiguous (it may be the body height) so the height is left unknown. ‘I.C. Compatible’ in the feature list is undefined. LCSC stock 458 on 2026-10-15.

Variants

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

Order codeFaceLensWhite PinsSiliconStatusFirst seenDatasheet
LTST-E133CEGBK — clear — 4 — active 2022-02-12 C
LCSC C7297451, stock 458.

Pinout

LTST-E133CEGBK
LTST-E133CEGBK 1313 package, top and side viewPin 1 is ringed. pin 1 VDD (power), pin 2 DIN (data in), pin 3 VSS (ground), pin 4 DOUT (data out).11 VDDpower22 DINdata in33 VSSground44 DOUTdata out1.3 mm1.3 mmtop view
  • Power
  • Data
  • Ground
  • Pin 1

Outline and pin positions checked against the manufacturer datasheet (C7297451 LTST-E133CEGBK rev C p1). Top view labels: Pin 2 top-left, Pin 3 top-right, Pin 1 bottom-left, Pin 4 bottom-right, so numbers run clockwise from the bottom-left. Soldering terminals 0.4 x 0.4 mm with 0.4 mm between them; a 'VDD mark' is printed on the VDD pad. What this means.

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

Protocol — Lite-On embedded single-wire IC (LTST series)

Timings shown from datasheet. Other sources disagree; see the protocol page.

Lite-On embedded single-wire IC (LTST series) bit timingLite-On embedded single-wire IC (LTST series) 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 80 nanoseconds; reset 50 microseconds low1 · Bit encoding, to scaleDINhighlowbit 0 period 1200 nsbit 1 period 1200 nsT0H 300 ±80 nsT1H 900 ±80 nsT0L 900 ±80 nsT1L 300 ±80 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 ≥ 50 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 · ±80 ns · period 1200 ns · reset 50 µs source: datasheet

Compatibility

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.

  • 2017-03-29 datasheet revision Lite-On LTST-G563EGBW-HM4 data sheet: 'Effective Date: 03/29/2017, Revision: A' ↗ day
  • 2022-02-12 datasheet revision Lite-On LTST-E133CEGBK sheet, spec DS22-2021-0144, effective date 02/12/2022 rev C ↗ 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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