2 layers312.5 × 122.3 mm
2 layers395.3 × 121.1 mm
- Size
- 395.3 × 121.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 377
- Nets
- 321
- Pads
- 1,706
- Tracks, vias
- 3,450, 1,503
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 10 Jan 2026
- Updated
- 24 Jan 2026
Overview
MK98 is an open-source printed circuit board by MondeCok, from the MondeCok/MK98-Key repository on GitHub. It is a 2-layer board of 395.3 × 121.1 mm with 377 parts on 321 nets, routed with 3,450 tracks and 1,503 vias.
It is built around the SN74LV1T125DBV, W25Q32JVSSIQ and ADG732BSUZ-REEL, with the AP2112K-3.3, USBLC6-2SC6 and SK6812 among its other parts. Its parts include 130 capacitors, 98 diodes, 14 resistors, 9 ICs and 6 connectors. It belongs with the STM32 and NXP (LPC, Kinetis, i.MX RT) boards of this library.
Main components
9
SN74LV1T125DBV
SOT-23-5-40℃~+125℃ 1 1 1.6V~5.5V 10uA 5.5ns@5V,15pF 74LV 8mA 8mA Tri-State Unidirectional SOT-23-5 Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
W25Q32JVSSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 133MHz 1uA 2.7V~3.6V 20 Years 32Mbit 3ms SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
ADG732BSUZ-REEL
TQFP-48(7x7)-2.5V~2.5V、1.8V~5.5V -40℃~+125℃ 16ns 18MHz 23ns 32 32:1 4Ω TQFP-48(7x7) Analog Switches, Multiplexers ROHSAnalog DevicesAnalog Switches, MultiplexersAP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
SK6812
SMD-4P,5.4x5mm-40℃~+85℃ 0.6mA 1.6mm 120° 160mcd~320mcd 1kHz 2000V 280mcd~515mcd 3.7V~5.5V 460nm~470nm 520nm~530nm 620nm~625nm 800Kbit/s 815mcd~1275mcd Built-in power-on reset circuit Semi-transparent lens SMD-4P,5.4x5mm RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
SKRPACE010
SMD-4P,4.2x3.2mm-30℃~+85℃ 16V 2.5mm 2.6N 3.2mm 4.2mm 50,000 cycles 50mA J-Lead Oval button SPST-NO Surface Mount,Vertical SMD-4P,4.2x3.2mm Tactile Switches ROHSALPSALPINETactile Switches
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETsBSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs
README
README.mdMK98-Key
Parts
377| Qty | Value | Footprint | References |
|---|---|---|---|
| 111 | 100nf | Capacitor_SMD:C_0603_1608Metric | C1, C10, C11, C100, C101, C102, C103, C104, C105, C106, C107, C108, C109, C110, C111, C112 +95 |
| 98 | 49E | PCM_marbastlib-he:SW_MX_HE_90deg_1u | HE1, HE2, HE10, HE11, HE12, HE13, HE14, HE15, HE16, HE17, HE18, HE19, HE20, HE21, HE22, HE23 +82 |
| 49 | SK6812 | PCM_marbastlib-mx:LED_MX_6028R | LED15, LED16, LED17, LED18, LED19, LED20, LED21, LED22, LED23, LED24, LED25, LED26, LED27, LED28, LED29, LED30 +33 |
| 49 | SK6812 | PCM_marbastlib-mx:LED_MX_6028R-ROT | LED1, LED2, LED3, LED4, LED10, LED11, LED12, LED13, LED14, LED34, LED35, LED36, LED37, LED38, LED39, LED40 +33 |
| 6 | MountingHole | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4, H5, H6 |
| 4 | 100R | Resistor_SMD:R_0603_1608Metric | R8, R10, R11, R12 |
| 4 | 10K | Resistor_SMD:R_0603_1608Metric | R6, R7, R9, R13 |
| 4 | 470pf | Capacitor_SMD:C_0603_1608Metric | C23, C24, C25, C26 |
| 4 | ADG732BSUZ-REEL | PCM_Mux:SU_48_ADI-L | U6, U7, U8, U9 |
| 3 | 10uF | Capacitor_SMD:C_0603_1608Metric | C2, C3, C5 |
| 2 | 100K | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | 18pf | Capacitor_SMD:C_0603_1608Metric | C19, C20 |
| 2 | 1uf | Capacitor_SMD:C_0603_1608Metric | C16, C17 |
| 2 | 2.2uf | Capacitor_SMD:C_0603_1608Metric | C27, C28 |
| 2 | 47uF | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B | C7, C8 |
| 2 | 5.1K | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R4, R5 |
| 2 | MX_stab_2.25U | marbastlib-mx:STAB_MX_2.25u | SB2, SB5 |
| 2 | MX_stab_2U | marbastlib-mx:STAB_MX_2u | SB1, SB4 |
| 2 | MX_stab_2U | marbastlib-mx:STAB_MX_2u_90deg | SB6, SB7 |
| 2 | SKRPACE010 | JCLPCB:KEY-SMD_4P-L4.2-W3.2-P2.20-LS4.6 | BOOT_BTN1, RST_BTN1 |
| 1 | 10nf | Capacitor_SMD:C_0603_1608Metric | C15 |
| 1 | 120R | Resistor_SMD:R_0603_1608Metric | FB1 |
| 1 | 1M | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 330 | Resistor_SMD:R_0603_1608Metric | R14 |
| 1 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C4 |
| 1 | 4.7uf | Capacitor_SMD:C_0603_1608Metric | C9 |
| 1 | 47uF | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | 8Mhz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | Conn_01x03 | Connector_JST:JST_SH_SM03B-SRSS-TB_1x03-1MP_P1.00mm_Horizontal | J3 |
| 1 | Conn_01x04 | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J4 |
| 1 | Conn_01x05_Pin | Connector_PinHeader_1.00mm:PinHeader_1x05_P1.00mm_Horizontal | J5 |
| 1 | LED_EXP | Connector_JST:JST_SH_BM03B-SRSS-TB_1x03-1MP_P1.00mm_Vertical | J6 |
| 1 | LOGO | PCM_Github_Link:Github_link | G*** |
| 1 | MX_stab_6.25U | marbastlib-mx:STAB_MX_6.25u | SB3 |
| 1 | OLED-128x32 | Display_KB:OLED-128x32 | J1 |
| 1 | RotaryEncoder_Switch_MP | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm_CircularMountingHoles | ENC1 |
| 1 | SN74LV1T125DBV | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | STM32F405RGTx | Package_QFP:LQFP-64_10x10mm_P0.5mm | U5 |
| 1 | USB C | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J2 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U4 |
| 1 | W25Q32JVSS | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U3 |
Questions
How big is the MK98 PCB?
It measures 395.3 × 121.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MK98 use?
377 parts, built around the SN74LV1T125DBV, W25Q32JVSSIQ, ADG732BSUZ-REEL and AP2112K-3.3. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the MK98 KiCad files?
From the MondeCok/MK98-Key repository on GitHub, at the commit this page was made from: the board is pcb/MK98.kicad_pcb and its schematic pcb/HE Sensor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MK98 design in my own project?
Its repository states no licence, so its author keeps all rights: ask MondeCok before reusing the design.
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