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TT1638X

Public Made by Adom

by adom

Shenzhen JingYang LED Drivers, SOP-28. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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TT1638X

Shenzhen JingYang · LED Drivers · SOP-28

TT1638X from Shenzhen JingYang, in a SOP-28. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 K1 input Key scan signal input 1; input data is latched at the end of the display cycle
2 K2 input Key scan signal input 2; input data is latched at the end of the display cycle
3 K3 input Key scan signal input 3; input data is latched at the end of the display cycle
4 VDD power_in Logic power supply; connect to 5V positive supply
5 SEG1/KS1 tri_state Segment 1 output (also key scan output 1); P-MOS open drain output
6 SEG2/KS2 tri_state Segment 2 output (also key scan output 2); P-MOS open drain output
7 SEG3/KS3 tri_state Segment 3 output (also key scan output 3); P-MOS open drain output
8 SEG4/KS4 tri_state Segment 4 output (also key scan output 4); P-MOS open drain output
9 SEG5/KS5 tri_state Segment 5 output (also key scan output 5); P-MOS open drain output
10 SEG6/KS6 tri_state Segment 6 output (also key scan output 6); P-MOS open drain output
11 SEG7/KS7 tri_state Segment 7 output (also key scan output 7); P-MOS open drain output
12 SEG8/KS8 tri_state Segment 8 output (also key scan output 8); P-MOS open drain output
13 SEG9 tri_state Segment 9 output; P-MOS open drain output
14 SEG10 tri_state Segment 10 output; P-MOS open drain output
15 VDD power_in Logic power supply; connect to 5V positive supply
16 GRID8 tri_state Grid 8 output (LED cathode); N-MOS open drain output
17 GRID7 tri_state Grid 7 output (LED cathode); N-MOS open drain output
18 GND power_in Logic ground; connect to system ground
19 GRID6 tri_state Grid 6 output (LED cathode); N-MOS open drain output
20 GRID5 tri_state Grid 5 output (LED cathode); N-MOS open drain output
21 GRID4 tri_state Grid 4 output (LED cathode); N-MOS open drain output
22 GRID3 tri_state Grid 3 output (LED cathode); N-MOS open drain output
23 GRID2 tri_state Grid 2 output (LED cathode); N-MOS open drain output
24 GRID1 tri_state Grid 1 output (LED cathode); N-MOS open drain output
25 GND power_in Logic ground; connect to system ground
26 DIO bidirectional Serial data input/output; input on rising clock edge (LSB first), output on falling clock edge (LSB first) with N-MOS open drain output requiring external 1K-10K pull-up resistor (10K recommended)
27 CLK input Serial clock input; reads data on rising edge and outputs data on falling edge
28 STB input Strobe input; initializes serial interface on falling edge and waits for instruction byte, ignores CLK when high

Key specifications

Parameter Value
Manufacturer Shenzhen JingYang
Package SOP-28
Category LED Drivers
Pins 28

CAD (KiCad official)

  • Symbol: TT1638X
  • Footprint: Package_SO:SOP-28_8.4x18.16mm_P1.27mm
  • 3D model: SOP-28 (KiCad packages3D, STEP)
  • 3D model files: tt1638x-etched.step / tt1638x-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tt1638x.step / tt1638x.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Shenzhen JingYang datasheet (18 pp, sha256 e69926c7e1313fe0, retrieved 2026-09-22, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF