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CH454S

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WCH(Jiangsu Qin Heng) LED Display Drivers, SOP-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentdisplay modules - led drivers - display driversch454sfactory-2.0.0extractor-text

Verified CH454S

by Ray · last 31 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

31 Oct 2026RayPublished by the parts factory: tier lcsc, 28 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: CH454S · SOP-28-300mil · 28 pins
  • ✓copper: 28 copper pads, none touching another net
  • ✓datasheet: all 28 pin names found in the 16-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: SOP-28_8.4x18.16mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-tnbcmhji/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): the datasheet dimensions give no height or body size to compare (datasheet p.2)
  • ✓pads: 28 pins = 28 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 28 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ ch454s.kicad_sym✓ ch454s.kicad_mod✓ ch454s.step
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3D Model

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Symbol & Footprint

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Contents

README

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CH454S

WCH(Jiangsu Qin Heng) · LED Display Drivers · SOP-28-300mil

CH454S from WCH(Jiangsu Qin Heng), in a SOP-28-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 DIG7 output Word drive of LED Nixie tube, active at low level; also keyboard scan output and doubles as the segment 17 driver.
2 DIG6 output Word drive of LED Nixie tube, active at low level; also keyboard scan output, active at high level.
3 DIG5 output Word drive of LED Nixie tube, active at low level; also keyboard scan output, active at high level.
4 DIG4 output Word drive of LED Nixie tube, active at low level; also keyboard scan output, active at high level.
5 DIG3 output Word drive of LED Nixie tube, active at low level; also keyboard scan output, active at high level.
6 DIG2 output Word drive of LED Nixie tube, active at low level; also keyboard scan output, active at high level.
7 DIG1 output Word drive of LED Nixie tube, active at low level; also keyboard scan output, active at high level.
8 DIG0 output Word drive of LED Nixie tube, active at low level; also keyboard scan output, active at high level.
9 GND power_in Common ground, continuous current not less than 150mA.
10 XSG0 bidirectional Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor.
11 XSG1 bidirectional Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor.
12 XSG2 bidirectional Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor.
13 XSG3 bidirectional Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor.
14 XSG6 bidirectional Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor.
15 XSG7 bidirectional Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor.
16 SEG0 bidirectional Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor.
17 SEG1 bidirectional Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor.
18 SEG2 bidirectional Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor.
19 SEG3 bidirectional Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor.
20 SEG4 bidirectional Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor.
21 SEG5 bidirectional Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor.
22 SEG6 bidirectional Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor.
23 SEG7 bidirectional Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor.
24 VCC power_in Positive power supply, continuous current not less than 150mA.
25 XSG4 bidirectional Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor.
26 XSG5 bidirectional Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor.
27 SDA bidirectional Open-drain data input and output of 2-wire serial interface, with built-in pull-up resistor.
28 SCL input Data clock of two-wire serial interface, with built-in pull-up resistor.

Key specifications

Parameter Value
Manufacturer WCH(Jiangsu Qin Heng)
Package SOP-28-300mil
Category Display Modules / LED Drivers / Display Drivers
Pins 28

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage VCC 2.8 5 5.3 V TA=25℃, VCC=5V 11
Current of power supply ICC 2 50 150 mA TA=25℃, VCC=5V 11
Low level input voltage of SEG and XSG pins VILseg -0.5 0.5 V TA=25℃, VCC=5V 11
High level input voltage of SEG and XSG pins VIHseg 1.8 V TA=25℃, VCC=5V; max printed as VCC+0.5 11
Remaining pins low level input voltage VIL -0.5 0.8 V TA=25℃, VCC=5V 11
Remaining pins high level input voltage VIH 2 V TA=25℃, VCC=5V; max printed as VCC+0.5 11
Low level output voltage of DIG pin VOLdig 0.8 V (-120mA) 11
High level output voltage of DIG pin VOHdig 4.5 V (8mA) 11
Low level output voltage of SEG and XSG pins VOLseg 0.5 V (-20mA) 11
High level output voltage of SEG and XSG pins VOHseg 4.5 V (20mA) 11
Low level output voltage of other pins VOL 0.5 V (-4mA) 11
Input pull-down current of SEG pin IDN1 -30 -80 -400 uA TA=25℃, VCC=5V 11
Input pull-down current of RSTI pin IDN0 -80 -140 -200 uA TA=25℃, VCC=5V 11
Input pull-up current of XSG pin IUP0 10 20 300 uA TA=25℃, VCC=5V 11
Input pull-up current of SCL pin IUP1 30 80 150 uA TA=25℃, VCC=5V 11
Input and output pull-up current of SDA pin IUP2 60 100 200 uA TA=25℃, VCC=5V 11
Output pull-up current of INT# pin IUP3 500 3500 5000 uA TA=25℃, VCC=5V 11
Default voltage threshold of power on reset VR 2 2.3 2.7 V TA=25℃, VCC=5V 11
Power on reset time of power supply TPR 3 10 50 mS TA=25℃, VCC=5V 11
Time between receiving sleep command and start of sleep TSLP 8 20 60 uS TA=25℃, VCC=5V 11
Time to be awakened to resume work during sleep TWK 10 100 200 uS TA=25℃, VCC=5V 11
Ambient temperature during operation TA -40 85 ℃ 10
Ambient temperature during storage TS -55 125 ℃ 10
Supply voltage VCC -0.5 6 V VCC connects to power, GND to ground 10
Voltage on the input or output pins VIO -0.5 V max printed as VCC+0.5 11
Continuous drive current of single DIG pin IMdig 0 200 mA 11
Continuous drive current of single SEG pin IMseg 0 30 mA 11
Total continuous drive current of all SEG pins IMall 0 200 mA 11
5V low power sleep current Islp5 0.08 mA all I/O suspended 11
3.3V low power sleep current Islp3 0.03 mA all I/O suspended 11

CAD (KiCad official)

  • Symbol: CH454S
  • Footprint: Package_SO:SOP-28_8.4x18.16mm_P1.27mm
  • 3D model: SOP-28-300mil (KiCad packages3D, STEP)
  • 3D model files: ch454s-etched.step / ch454s-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ch454s.step / ch454s.glb are the bare package body.

Provenance

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

  • Datasheet: WCH(Jiangsu Qin Heng) datasheet (16 pp, sha256 b9c43ce7c021be93, retrieved 2026-10-31, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (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