4 layers90 × 153 mm
Blackpants
o7-machinehum/Blackpants
Open blackpants.kicadpro for the active A523 schematic and PCB. It replaces the A33 hierarchy and uses AXP717C + AXP323 with 2GB LPDDR4.
139 parts189MIT
6 layers90 × 153 mm
Blackpants
o7-machinehum/Blackpants189Open blackpants.kicadpro for the active A523 schematic and PCB. It replaces the A33 hierarchy and uses AXP717C + AXP323 with 2GB LPDDR4.
- Size
- 90 × 153 mm
- Copper layers
- 6
- Thickness
- 1.6 mm
- Parts
- 300
- Nets
- 528
- Pads
- 2,058
- Tracks, vias
- 5,218, 976
- Pours
- 30
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 21 Aug 2025
- Updated
- 17 Sep 2026
Overview
Blackpants is an open-source printed circuit board by o7-machinehum, from the o7-machinehum/Blackpants repository on GitHub, published under the MIT licence. It is a 6-layer board of 90 × 153 mm with 300 parts on 528 nets, routed with 5,218 tracks and 976 vias.
It is built around the AOZ1280CI, AP3032KTR-G1 and AP3036BKTR-G1, with the USBLC6-2SC6, AXP323 and AXP717C among its other parts. Its parts include 159 capacitors, 69 resistors, 13 diodes, 12 ICs and 12 inductors.
Main components
12
AOZ1280CI
SOT-23-6-40℃~+85℃ 1 1.2A 1.5MHz 1mA 3V~26V 800mV~26V Adjustable Buck Built-in No Overcurrent Protection、Cycle-by-cycle current limiting、Hiccup current limiting Step-down type SOT-23-6 DC-DC Converters ROHSAlpha & Omega SemiconductorDC-DC ConvertersAP3032KTR-G1
SOT-23-6-40℃~+85℃ 1 1.4A 1MHz 2.7V~9V Boost Built-in DC-DC PWM Under Voltage Protection、Over Voltage Protection、Over-Temperature Protection (OTP) SOT-23-6 LED Drivers ROHSDiodes IncorporatedLED DriversAP3036BKTR-G1
SOT-23-6-40℃~+85℃ 1 1MHz 2.5V~16V 550mA Boost Built-in DC-DC Over Voltage Protection PWM SOT-23-6 LED Drivers ROHSDiodes IncorporatedLED DriversUSBLC6-2SC6
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)AXP323
QFN-20-EP(3x3)QFN-20-EP(3x3) Power Management - Specialized ROHSX-Powers TechPower Management - SpecializedAXP717C
QFN-52-EP(6x6)QFN-52-EP(6x6) Power Management - Specialized ROHSX-Powers TechPower Management - Specialized
MIC2026-1YM-TR
SOIC-8-40℃~+85℃ 1.25A 140mΩ 2 2.7V~5.5V Active High High Side Switch Short-Circuit Protection(SCP)、Undervoltage Protection(UVP)、Over Temperature Protection SOIC-8 Power Distribution Switches ROHSMicrochip TechnologyPower Distribution SwitchesNT6AN512T32AV-J2I
BGA200UncategorisedNanya Tech
CL05B104KB54PNC
0402100nF 50V X7R ±10% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMTLTW-010DCG
SMD,3.7x0.9mm-30℃~+85℃ 115° 120mW 2.25cd 20mA 3.3V Discrete Diode White SMD,3.7x0.9mm LED Indication - Discrete ROHSLite-OnLED Indication - DiscreteXAL4020-102MEB
16161uH ±20% 1616 Power Inductors ROHSCoilcraftPower Inductors
RC0402JR-0710KL
UncategorisedUnknown maker
README
ee/integrated/README.mdBlackpants hardware
Open blackpants.kicad_pro for the active A523 schematic and PCB. It replaces the A33 hierarchy and uses AXP717C + AXP323 with 2GB LPDDR4.
- Schematic review PDF
- Capture status and interface mapping
- Six-layer layout status and previews
- RAM sourcing
- Source documents
All 65 SoC-to-RAM signal paths are connected. There are 139 open connections overall. Routing remains incomplete; DDR timing and signal/power integrity have not been approved.
Parts
300| Qty | Value | Footprint | References |
|---|---|---|---|
| 50 | 2.2uF | Capacitor_SMD:C_0402_1005Metric | C201, C206, C207, C210, C211, C212, C222, C223, C225, C232, C233, C235, C241, C242, C243, C244 +34 |
| 24 | 100nF | Capacitor_SMD:C_0402_1005Metric | C10, C11, C13, C14, C15, C16, C23, C27, C31, C33, C102, C121, C309, C318, C401, C507 +8 |
| 20 | 100nF | Capacitor_SMD:C_0201_0603Metric | C202, C204, C209, C226, C245, C254, C255, C257, C261, C263, C264, C265, C266, C267, C268, C269 +4 |
| 16 | 1uF | Capacitor_SMD:C_0402_1005Metric | C7, C30, C44, C203, C224, C234, C508, C509, C511, C512, C513, C520, C521, C522, C552, C801 |
| 10 | 100k | Resistor_SMD:R_0402_1005Metric | R104, R105, R106, R107, R108, R123, R716, R717, R718, R905 |
| 9 | 10uF | Capacitor_SMD:C_0603_1608Metric | C32, C310, C501, C505, C543, C544, C545, C703, C920 |
| 8 | 100K | Resistor_SMD:R_0402_1005Metric | R6, R7, R9, R13, R22, R26, R27, R28 |
| 8 | 22uF | Capacitor_SMD:C_0603_1608Metric | C103, C502, C503, C504, C514, C515, C516, C922 |
| 8 | LED | keyboard_leds:LTW-010DCG | D15, D16, D17, D18, D19, D20, D21, D22 |
| 7 | 1uH | Inductor_SMD:L_Coilcraft_XAL4020-XXX | L501, L502, L503, L504, L505, L506, L507 |
| 7 | 22uF | Capacitor_SMD:C_0402_1005Metric | C205, C208, C220, C221, C230, C231, C240 |
| 6 | 1k | Resistor_SMD:R_0402_1005Metric | R2, R33, R204, R205, R901, R902 |
| 6 | CaseScrew | MountingHole:MountingHole_2.7mm_Pad | H1, H2, H3, H4, H6, H7 |
| 5 | 10k | Resistor_SMD:R_0402_1005Metric | R103, R503, R504, R715, R801 |
| 5 | 10k | Resistor_SMD:R_0201_0603Metric | R710, R711, R712, R713, R714 |
| 4 | 22uF | Capacitor_SMD:C_0805_2012Metric | C910, C912, C913, C914 |
| 4 | 470nF | Capacitor_SMD:C_0402_1005Metric | C273, C274, C275, C276 |
| 4 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U5, U6, U12, U101 |
| 3 | 10nF | Capacitor_SMD:C_0402_1005Metric | C902, C911, C921 |
| 3 | 1nF | Capacitor_SMD:C_0402_1005Metric | C258, C259, C260 |
| 3 | 2.2k | Resistor_SMD:R_0402_1005Metric | R501, R502, R907 |
| 3 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C12, C506, C517 |
| 3 | 5.1K | Resistor_SMD:R_0402_1005Metric | R3, R4, R10 |
| 2 | 0 | Resistor_SMD:R_0402_1005Metric | R201, R703 |
| 2 | 10k / 1% | Resistor_SMD:R_0402_1005Metric | R211, R213 |
| 2 | 10pF | Capacitor_SMD:C_0402_1005Metric | C28, C29 |
| 2 | 150k | Resistor_SMD:R_0402_1005Metric | R124, R906 |
| 2 | 18pF | Capacitor_SMD:C_0402_1005Metric | C250, C251 |
| 2 | 200 / 1% | Resistor_SMD:R_0402_1005Metric | R209, R210 |
| 2 | 33 | Resistor_SMD:R_0402_1005Metric | R203, R208 |
| 2 | 470 | Resistor_SMD:R_0402_1005Metric | R903, R904 |
| 2 | 47k | Resistor_SMD:R_0402_1005Metric | R206, R207 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R121, R122 |
| 2 | DNP | Capacitor_SMD:C_0402_1005Metric | C701, C702 |
| 2 | LED | LED_SMD:LED_0603_1608Metric | D6, D8 |
| 2 | SolderJumper_2_Bridged | Jumper:SolderJumper-2_P1.3mm_Bridged_Pad1.0x1.5mm | JP4, JP6 |
| 2 | TestPoint | TestPoint:TestPoint_Pad_1.0x1.0mm | TP2, TP3 |
| 2 | USB_A | blackpants:USB_A_Receptacle_GCT_1 | J4, J5 |
| 1 | 0.22uF | Capacitor_SMD:C_0603_1608Metric | C802 |
| 1 | 100k / 1% | Resistor_SMD:R_0402_1005Metric | R911 |
| 1 | 10k @25C / cell-attached NTC | Connector_Wire:SolderWire-0.5sqmm_1x02_P4.6mm_D0.9mm_OD2.1mm | TH901 |
| 1 | 10uF | Capacitor_SMD:C_0402_1005Metric | C262 |
| 1 | 120 / 1% | Resistor_SMD:R_0402_1005Metric | R301 |
| 1 | 120R @100MHz / >=0.6A | Inductor_SMD:L_0603_1608Metric | L701 |
| 1 | 12K | Resistor_SMD:R_0402_1005Metric | R8 |
| 1 | 15.8k / 1% | Resistor_SMD:R_0402_1005Metric | R921 |
| 1 | 1K | Resistor_SMD:R_0402_1005Metric | R19 |
| 1 | 1M | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | 1N5819WS | Diode_SMD:D_SOD-323 | D13 |
| 1 | 1uH / Isat >= 7A | Inductor_SMD:L_Coilcraft_XAL4020-XXX | L901 |
| 1 | 2.2uH / Isat >= 2A | Inductor_SMD:L_Coilcraft_XAL4020-XXX | L902 |
| 1 | 2.7k / 1% | Resistor_SMD:R_0402_1005Metric | R214 |
| 1 | 22uH | Inductor_SMD:L_1210_3225Metric | L801 |
| 1 | 240 / 1% | Resistor_SMD:R_0402_1005Metric | R302 |
| 1 | 24MHz / CL20pF / 20ppm | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y201 |
| 1 | 24Mhz | Crystal:Crystal_SMD_Citizen_CS325S-4Pin_3.2x2.5mm | Y1 |
| 1 | 3.9k / 1% | Resistor_SMD:R_0402_1005Metric | R212 |
| 1 | 402k / 1% | Resistor_SMD:R_0402_1005Metric | R910 |
| 1 | 49.9k / 1% | Resistor_SMD:R_0402_1005Metric | R920 |
| 1 | 4A hold | Fuse:Fuse_1812_4532Metric | F1 |
| 1 | 4R7 | Resistor_SMD:R_0402_1005Metric | R23 |
| 1 | 5R1 | Resistor_SMD:R_0402_1005Metric | R802 |
| 1 | 6.8uH | Inductor_SMD:L_Vishay_IFSC-1515AH_4x4x1.8mm | L3 |
| 1 | A523 | A523:Allwinner_A523_FCCSP-522_15x15mm_P0.5mm | U201 |
| 1 | AOZ1280CI | Package_TO_SOT_SMD:SOT-23-6 | U7 |
| 1 | AP3032 | Package_TO_SOT_SMD:SOT-23-6_Handsoldering | U15 |
| 1 | AP3036B | Package_TO_SOT_SMD:SOT-23-6 | U801 |
| 1 | AXP323 | AXP:QFN-20-1EP_3x3mm_P0.4mm_EP1.65x1.65mm | U502 |
| 1 | AXP717C | AXP:QFN-52-1EP_6x6mm_P0.4mm_EP4.6x4.6mm | U501 |
| 1 | Antenna | Connector_Coaxial:SMA_Amphenol_901-143_Horizontal | J701 |
| 1 | Charge status | LED_SMD:LED_0603_1608Metric | D902 |
| 1 | Conn_01x20_MountingPin | Connector_FFC-FPC:Hirose_FH12-20S-0.5SH_1x20-1MP_P0.50mm_Horizontal | J801 |
| 1 | Conn_ARM_SWD_TagConnect_TC2030-NL | Connector:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J3 |
| 1 | DRAM sense | NetTie:NetTie-2_SMD_Pad0.5mm | NT301 |
| 1 | FEL | Button_Switch_SMD:SW_SPST_TL3342 | SW101 |
| 1 | Logo_Open_Hardware_Large | Symbol:OSHW-Logo2_24.3x20mm_SilkScreen | S1 |
| 1 | MIC2026-1xM | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | MSS2P3 | Diode_SMD:D_MicroSMP_LargeCathode | D901 |
| 1 | NT6AN512T32AV-J2 | LPDDR4:FBGA-200_10x15mm_P0.8x0.65mm | U301 |
| 1 | Power | PTS847MM160LSMTR2_LFS:SW_PTS847MM160LSMTR2_LFS | PWR_BUTTON1 |
The 288 most common of 300 parts.
Questions
How big is the Blackpants PCB?
It measures 90 × 153 mm and has 6 copper layers, 1.6 mm thick.
What parts does the Blackpants use?
300 parts, built around the AOZ1280CI, AP3032KTR-G1, AP3036BKTR-G1 and USBLC6-2SC6. 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 Blackpants KiCad files?
From the o7-machinehum/Blackpants repository on GitHub, at the commit this page was made from: the board is ee/integrated/blackpants.kicad_pcb and its schematic ee/blackpants/blackpants.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Blackpants design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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