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AI8H2K12U-45I-TSSOP20

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STC Micro Microcontrollers (MCU/MPU/SOC), TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentembedded processors & controllersai8h2k12u-45i-tssop20factory-2.0.0extractor-text

Verified AI8H2K12U-45I-TSSOP20

by Ray · last 7 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

7 Nov 2026RayPublished by the parts factory: tier lcsc, 20 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: AI8H2K12U-45I-TSSOP20 · TSSOP-20 · 20 pins
  • ✓copper: 20 copper pads, none touching another net
  • ✓datasheet: all 20 pin names found in the 2160-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: TSSOP-20_4.4x6.5mm_P0.65mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-ii204s_8/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 20 pins = 20 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 20 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ ai8h2k12u-45i-tssop20.kicad_sym✓ ai8h2k12u-45i-tssop20.kicad_mod✓ ai8h2k12u-45i-tssop20.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 4d ago
viewers ai8h2k12u-45i-tssop20: viewers · Ray 4d ago
ai8h2k12u-45i-tssop20-etched.glb Publish 0.1.0 · Ray 4d ago
ai8h2k12u-45i-tssop20-etched.step ai8h2k12u-45i-tssop20: factory component page (tier=lcsc) · Ray 4d ago
ai8h2k12u-45i-tssop20-hero.glb ai8h2k12u-45i-tssop20: hero GLB from the etched model (keeps the MPN mark) · Ray 4d ago
ai8h2k12u-45i-tssop20-hero.overlay.json Publish 0.1.0 · Ray 4d ago
ai8h2k12u-45i-tssop20.glb Publish 0.1.0 · Ray 4d ago
ai8h2k12u-45i-tssop20.kicad_mod Publish 0.1.0 · Ray 4d ago
ai8h2k12u-45i-tssop20.kicad_sym Publish 0.1.0 · Ray 4d ago
ai8h2k12u-45i-tssop20.lbr Publish 0.1.0 · Ray 4d ago
ai8h2k12u-45i-tssop20.step Publish 0.1.0 · Ray 4d ago
package.json Publish 0.1.0 · Ray 4d ago
page.json Set visibility: public · Ray 4d ago
README.md Publish 0.1.0 · Ray 4d ago
verification.json Verified: Published by the parts factory: tier lcsc, 20 pins · Ray 4d ago

AI8H2K12U-45I-TSSOP20

STC Micro · Microcontrollers (MCU/MPU/SOC) · TSSOP-20

AI8H2K12U-45I-TSSOP20 from STC Micro, in a TSSOP-20. 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 P1.4 bidirectional General-purpose I/O port P1.4; supports quasi-bidirectional, push-pull, open-drain and high-impedance input modes.
2 P1.5 bidirectional General-purpose I/O port P1.5; supports quasi-bidirectional, push-pull, open-drain and high-impedance input modes.
3 P1.6 bidirectional General-purpose I/O port P1.6; an external crystal can be fitted on P1.6/P1.7.
4 P1.7 bidirectional General-purpose I/O port P1.7; an external crystal can be fitted on P1.6/P1.7.
5 P1.3 bidirectional General-purpose I/O port P1.3.
6 UCap passive UCap pin, connected to an external capacitor (0.1u shown in the reference schematic).
7 P5.4 bidirectional P5.4 I/O, default I/O function, configurable as active-low reset nRST; drives MCU_VCC power control in the auto power-cycle ISP circuit.
8 Vcc power_in Positive power supply pin.
9 Vref+ power_in Reference supply pin (VRef+), wired to Vcc in the reference schematic.
10 Gnd power_in Ground pin.
11 D-/P3.0 bidirectional USB D- data line, shared with P3.0 (RxD); used for ISP download and debug interface.
12 D+/P3.1 bidirectional USB D+ data line, shared with P3.1 (TxD); used for ISP download and debug interface.
13 P3.2 bidirectional General-purpose I/O port P3.2; pulled low at power-up together with P3.0/P3.1 selects USB ISP download mode.
14 P3.3 bidirectional General-purpose I/O port P3.3.
15 P3.4 bidirectional General-purpose I/O port P3.4; shown as push-pull output in the dual-UART schematic.
16 P3.5 bidirectional General-purpose I/O port P3.5; outputs low at power-up to keep MCU_VCC powered in the auto power-cycle ISP circuit.
17 RxD/P3.6 bidirectional P3.6 I/O, UART1 receive (RxD), second serial port for communication.
18 TxD/P3.7 bidirectional P3.7 I/O, UART1 transmit (TxD), second serial port for communication.
19 TxD2/P1.1 bidirectional P1.1 I/O, UART2 transmit (TxD2).
20 RxD2/P1.0 bidirectional P1.0 I/O, UART2 receive (RxD2).

Key specifications

Parameter Value
Manufacturer STC Micro
Package TSSOP-20
Category Embedded Processors & Controllers
Pins 20

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
存储温度 -55 150 ℃ 1826
工作温度 -40 125 ℃ 1826
工作电压 1.9 5.5 V 1826
VDD 对地电压 VDD -0.3 5.5 V 1826
I/O 口对地电压 -0.3 V 1826
输入低电平（打开施密特触发） VIL1 0.99 V VSS=0V, VDD=3.3V, 测试温度=25℃; 打开施密特触发 1827
输入低电平（关闭施密特触发） VIL1 1.07 V VSS=0V, VDD=3.3V, 测试温度=25℃; 关闭施密特触发 1827
输入高电平（普通 I/O，打开施密特触发） VIH1 1.18 V VSS=0V, VDD=3.3V, 测试温度=25℃; 打开施密特触发 1827
输入高电平（普通 I/O，关闭施密特触发） VIH1 1.09 V VSS=0V, VDD=3.3V, 测试温度=25℃; 关闭施密特触发 1827
逻辑 0 输入电流 IIL 50 uA VSS=0V, VDD=3.3V, 测试温度=25℃; 端口电压 0V 1827
逻辑 1 到 0 的转移电流 ITL 100 270 600 uA VSS=0V, VDD=3.3V, 测试温度=25℃; 端口电压 2.0V 1827
I/O 口上拉电阻 RPU 5.8 5.9 6 KΩ VSS=0V, VDD=3.3V, 测试温度=25℃ 1827

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
housing PC Accumulator contents and the contents of a sixteen-bit base register, which may be either the Data Pointer or the PC. In the latter case, the PC is incremented to the address of the following 1021

CAD (KiCad official)

  • Symbol: AI8H2K12U-45I-TSSOP20
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: ai8h2k12u-45i-tssop20-etched.step / ai8h2k12u-45i-tssop20-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ai8h2k12u-45i-tssop20.step / ai8h2k12u-45i-tssop20.glb are the bare package body.

Provenance

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

  • Datasheet: STC Micro datasheet (2160 pp, sha256 3d1a528ec8100d28, retrieved 2026-11-07, 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 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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