Xt8086 beta
About the Xt8086 beta PCB
Xt8086 beta is an open source RP2040/RP2350 PCB design by rh1tech, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 99.5 × 80 mm, with 239 components from 90 distinct parts.
Its main chip is the RP2350B, from the RP2040/RP2350 family. Other key parts include the SN74LS04N, SN74LS74ANE4, TS3USB221RSER, MW7211A and 8086_Min_Mode. By type, the board carries 106 capacitors, 73 resistors, 21 ICs, 8 connectors, 7 inductors and 6 jumpers.
From the project
FRANK Board Laboratory (work-in-progress board prototopyes)
Official page: frank.rh1.tech — hub for all FRANK boards and firmware.
Experimental and work-in-progress boards for the FRANK hardware emulation platform.
WARNING: These boards are untested and unreleased. Do NOT order PCBs from this repository. They may contain errors, incomplete routing, or unverified component footprints. Use at your own risk.
For production-ready boards, see the main frank repository.
Main components on the Xt8086 beta
Xt8086 beta bill of materials (BOM)
239 components, 90 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SN74LS04N 74HCT04 | SOIC127P600X175-14N | U1 |
| 1 | SN74LS74ANE4 SN74LS74 | SOIC127P600X175-14N | U2 |
| 1 | TS3USB221RSER | Texas_R-PUQFN-N10 | U3 |
| 1 | MW7211A | SOIC127P600X175-16N | U4 |
| 1 | 8086_Min_Mode | DIP-40_W15.24mm_Socket | U5 |
| 1 | RP2350B | RP2350-QFN-80_10x10_P0.4mm | U6 |
| 1 | W25Q128JVPIQ | SON127P600X500X80-9N-D | U7 |
| 1 | ESP-PSRAM64H | SO-8 | U8 |
| 3 | USBLC6-2SC6 | SOT-23-6 | U9, U11, U12 |
| 1 | TPS2116DRL | SOT-583-8 | U10 |
| 1 | MP1584EN-LF-Z | SOIC-9_P1.27mm | U13 |
| 1 | DS3231MZ | SO-8 | U14 |
| 1 | MS9288A | QFN-48_6x6mm_P0.4mm | U15 |
| 1 | AMS1117-1.8 | SOT-223-3_TabPin2 | U16 |
| 1 | SY8089AAAC | SOT-23-5 | U17 |
| 2 | CH217K | SOT-23-6 | U18, U19 |
| 1 | LM358 | SOIC-8_3.9x4.9mm_P1.27mm | U20 |
| 1 | PAM8403D | SOP-16_P1.27mm | U21 |
| 2 | AO3401A | SOT-23-3L_AOS | Q1, Q2 |
| 1 | 24.576MHz | Crystal_SMD_2520-4Pin | Y1 |
Show 70 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 12MHz | Oscillator_SMD_3225_4Pin | Y2 |
| 1 | PWR | PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | 693072010801 | MicroSD_SMD_Long | J3 |
| 1 | PJ-320D | AudioJack_3.5mm_PJ320D_AudioOut | J4 |
| 1 | Debug | JST_SH_1x03_P1.00mm_Vertical | J5 |
| 1 | USB4215-03-A | USB_C_Receptacle | J6 |
| 1 | SS-52100-004 | USB_A_Stacked | J7 |
| 1 | DC-005-5A-2.0 | BarrelJack_DC-005 | J8 |
| 1 | DC3RX19JA2 | HDMI_Female | J9 |
| 1 | 1174 Battery_CR1220 | Battery_CR1220 | BT1 |
| 1 | 1.5A 24V | Fuse_1812_4532Metric | F1 |
| 1 | 0.2A 9V | Fuse_0603_1608Metric | F2 |
| 1 | Power Debug | SolderJumper-2_P1.0mm_Open_RoundedPad0.7x1.0mm | JP1 |
| 1 | Force On | SolderJumper-2_P1.0mm_Open_RoundedPad0.7x1.0mm | JP2 |
| 1 | USB Test | SolderJumper-2_P1.0mm_Open_RoundedPad0.7x1.0mm | JP3 |
| 1 | Audio L | SolderJumper-2_P1.0mm_Open_RoundedPad0.7x1.0mm | JP4 |
| 1 | Audio R | SolderJumper-2_P1.0mm_Open_RoundedPad0.7x1.0mm | JP5 |
| 1 | Speaker | SolderJumper-2_P1.0mm_Open_RoundedPad0.7x1.0mm | JP6 |
| 1 | 2308 1W 8Ω | CVS-2308 | LS1 |
| 1 | SK12D07VG3NS SS12D00 | Switch_Slide_SS12D00 | S1 |
| 1 | DS05-127-2-03BK-SMT-TR | SW_DIP_DS05-127-2-03BK-SMT | S2 |
| 1 | KMR221G LFS Boot | Button_SMD_3x4x2mm | S3 |
| 1 | KMR221G LFS Reset | Button_SMD_3x4x2mm | S4 |
| 1 | SK12D07VG3NS | Switch_Slide_SK12D07VG3NS | S5 |
| 2 | Red | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D6 |
| 1 | Green | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 1 | SS34 | D_SMA | D4 |
| 1 | 1N5819WS | D_SOD-323 | D5 |
| 3 | 220Ω@100MHz | L_0805_2012Metric | FB1, FB2, FB3 |
| 1 | 330Ω@100MHz 2A | L_0805_2012Metric | FB4 |
| 1 | 3.3µH | L_LQH2MCN100K02L | L1 |
| 1 | 22µH | Inductor_CDRH104RNP | L2 |
| 1 | 2.2µH | L_Cenker_CKCS3015 | L3 |
| 6 | 100µF | CP_Radial_D6.3mm_P2.50mm | C1, C4, C36, C89, C92, C106 |
| 47 | 100nF | C_0603_1608Metric | C2, C3, C5, C8, C9, C10, C11, C13 +39 |
| 8 | 1µF | C_0603_1608Metric | C6, C43, C68, C69, C78, C79, C102, C103 |
| 8 | 4.7µF | C_0603_1608Metric | C7, C12, C14, C16, C17, C54, C56, C62 |
| 20 | 10µF | C_0603_1608Metric | C34, C35, C40, C41, C45, C50, C72, C73 +12 |
| 2 | 100µF | C_1206_3216Metric | C38, C85 |
| 2 | 1nF | C_0603_1608Metric | C42, C63 |
| 1 | 680µF | CP_Radial_D8.0mm_P3.50mm | C44 |
| 1 | 150pF | C_0603_1608Metric | C47 |
| 1 | 220µF | CP_Radial_D6.3mm_P2.50mm | C51 |
| 3 | 220nF | C_0603_1608Metric | C53, C55, C60 |
| 2 | 15pF | C_0603_1608Metric | C61, C64 |
| 1 | 22µF | CP_EIA-3528-12_Kemet-T | C76 |
| 1 | 22pF | C_0603_1608Metric | C88 |
| 2 | 10nF | C_0603_1608Metric | C95, C96 |
| 1 | 6.8nF | C_0603_1608Metric | C101 |
| 9 | 1kΩ | R_0603_1608Metric | R1, R2, R3, R4, R6, R7, R10, R46 +1 |
| 13 | 10kΩ | R_0603_1608Metric | R5, R13, R14, R24, R63, R64, R65, R66 +5 |
| 2 | 2.2kΩ | R_0603_1608Metric | R8, R55 |
| 1 | 33Ω | R_0603_1608Metric | R9 |
| 2 | 27Ω | R_0603_1608Metric | R11, R12 |
| 3 | 0Ω | R_0603_1608Metric | R15, R72, R74 |
| 2 | 5.1kΩ | R_0603_1608Metric | R16, R17 |
| 1 | 1MΩ | R_0603_1608Metric | R18 |
| 1 | 300kΩ | R_0603_1608Metric | R19 |
| 11 | 100kΩ | R_0603_1608Metric | R20, R21, R22, R23, R25, R27, R28, R49 +3 |
| 1 | 39kΩ | R_0603_1608Metric | R26 |
| 1 | 8.2kΩ | R_0603_1608Metric | R29 |
| 1 | 43kΩ | R_0603_1608Metric | R30 |
| 4 | 4.7kΩ | R_0603_1608Metric | R31, R32, R40, R41 |
| 3 | 806Ω | R_0603_1608Metric | R33, R35, R37 |
| 5 | 402Ω | R_0603_1608Metric | R34, R36, R38, R58, R59 |
| 3 | 75Ω | R_0603_1608Metric | R39, R42, R43 |
| 2 | 100Ω | R_0603_1608Metric | R44, R45 |
| 3 | 2kΩ | R_0603_1608Metric | R47, R48, R62 |
| 3 | 22kΩ | R_0603_1608Metric | R50, R60, R61 |
| 2 | 20kΩ | R_0603_1608Metric | R56, R57 |
Xt8086 beta design files
The KiCad project lives in the rh1tech/frank-lab repository on GitHub; these links point at the commit this page was built from.
Xt8086 beta: common questions
What microcontroller does the Xt8086 beta use?
The Xt8086 beta is built around the RP2350B, from the RP2040/RP2350 family.
How big is the Xt8086 beta PCB?
The Xt8086 beta measures 99.5 × 80 mm, has 4 copper layers and is 1 mm thick.
How many components are on the Xt8086 beta?
239 components, from 90 distinct parts. The full bill of materials is listed on this page.
Where can I download the Xt8086 beta design files?
From the rh1tech/frank-lab repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Xt8086 beta design in my own project?
Yes, under the terms of its GPL-3.0 license, which rh1tech chose for the repository.
Can I test firmware for the Xt8086 beta without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.
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