QSIC
About the QSIC PCB
QSIC is an open source FPGA PCB design by dabridgham, published on GitHub. It is a 6-layer board measuring 214.1 × 131.8 mm, with 212 components from 56 distinct parts.
Its main chip is the XC7A75T-2FGG484, from the FPGA family. Other key parts include the AM26LV31EIPWR, MT25QL128ABA1EW7-0SIT, FT2232HQ, 93LC46BC-IST and TPS2561DRCR. By type, the board carries 93 capacitors, 64 resistors, 35 ICs, 10 diodes, 5 connectors and 2 crystals.
It belongs with the retro computing designs in this gallery.
From the project
A QBUS FPGA board to emulate disk drives
Main components on the QSIC
QSIC bill of materials (BOM)
212 components, 56 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | XC7A75T-2FGG484 | Xilinx_FGG484 | U1 |
| 1 | AM26LV31EIPWR | TSSOP-16_4.4x5mm_P0.65mm | U2 |
| 1 | MT25QL128ABA1EW7-0SIT MT25Q | DFN-8-1EP_6x5mm_P1.27mm_EP4x4mm | U101 |
| 1 | FT2232HQ | QFN-64-1EP_9x9mm_P0.5mm_EP4.35x4.35mm_ThermalVias | U201 |
| 1 | 93LC46BC-IST 93LC46BT-I/ST | TSSOP-8_4.4x3mm_P0.65mm | U202 |
| 1 | TPS2561DRCR TPS2561 | VSON-10-1EP_3x3mm_P0.5mm_EP1.65x2.4mm_ThermalVias | U203 |
| 1 | USB3340-EZK USB3340 | QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm | U205 |
| 4 | TPS82085SILT TPS82085 | Texas_SIL0008D_MicroSiP-8-1EP_2.8x3mm_P0.65mm_EP1.1x1.9mm_ThermalVias | U301, U302, U303, U304 |
| 11 | DS8641 DS8641-LR | DIP-16_W7.62mm | U401, U402, U407, U408, U409, U410, U415, U416 +3 |
| 11 | SN74LVC8T245QPWRQ1 74LVC8T245 | TSSOP-24_4.4x7.8mm_P0.65mm | U403, U404, U405, U406, U411, U412, U413, U414 +3 |
| 1 | MT41J128M16JT-125:K TR MT41J128M16JT-125 | BGA-96_9.0x13.0mm_Layout2x3x16_P0.8mm | U501 |
| 1 | TPS51206DSQR TPS51206 | WSON-10-1EP_2x2mm_P0.4mm_EP0.9x1.5mm_ThermalVias | U502 |
| 1 | ASE-24.000MHZ-LC-T ASE-24.000MHz | Oscillator_SMD_Abracon_ASE-4Pin_3.2x2.5mm | X201 |
| 1 | ABM10-167-12.000MHZ-T3 12 MHz | Crystal_SMD_Abracon_ABM10-4Pin_2.5x2.0mm | Y201 |
| 1 | 47346-0001 USB_microB | USB_Micro-B_Molex_47346-0001 | J201 |
| 2 | TF-15x15 | TF15X15 | J202, J204 |
| 1 | 87583-3010 USB_A | Amphenol_87583_USB_A | J203 |
| 1 | SBH11-PBPC-D05-RA-BK 02x05 Right Angle Shrouded | Box_Header_2x05_P2.54mm | P201 |
| 1 | A6S-8101-H DIP Switch x8 | SW_DIP_SPSTx08_Slide_Omron_A6S-810x_W8.9mm_P2.54mm | S201 |
| 10 | LTST-C190KGKT green | LED_0603_1608Metric | D101, D201, D202, D203, D204, D205, D206, D207 +2 |
Show 36 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 742792022 220Ω @ 100MHz 50mΩ | L_0805_2012Metric | FB201, FB202 |
| 4 | 10 uF 16V | CP_EIA-3216-18_Kemet-A | C1, C2, C3, C4 |
| 15 | CL10A226MP8NUNE 22µF | C_0603_1608Metric | C101, C102, C103, C104, C106, C107, C218, C226 +7 |
| 52 | CL10B104KO8NNNC 100nF | C_0603_1608Metric | C105, C201, C202, C203, C204, C205, C206, C207 +44 |
| 2 | CL10A475KP8NNNC 4.7µF 6.3V | C_0603_1608Metric | C208, C210 |
| 1 | CL10A335KP8NNNC 3.3µF 6.3V | C_0603_1608Metric | C213 |
| 2 | CL10C8R2DB8NNNC 8pF | C_0603_1608Metric | C215, C216 |
| 1 | EEEFTV151XAP 150µF 10V | C_Elec_6.3x7.7 | C221 |
| 2 | CL10B105KO8NNNC 1µF | C_0603_1608Metric | C224, C225 |
| 1 | CL10B103KB8NNNC 10nF | C_0603_1608Metric | C228 |
| 8 | CL10A106MP8NNNC 10µF 10V | C_0603_1608Metric | C302, C303, C304, C306, C308, C310, C505, C506 |
| 4 | CL10A106MP8NNNC 10µF | C_0603_1608Metric | C503, C504, C510, C511 |
| 1 | CL10B224KO8NNNC 220nF | C_0603_1608Metric | C507 |
| 4 | RC0603FR-074K7L 4.7k | R_0603_1608Metric | R101, R102, R105, R106 |
| 1 | RC0603FR-072K4L 2.4k | R_0603_1608Metric | R103 |
| 14 | RC0603FR-07330RL 330 | R_0603_1608Metric | R104, R201, R202, R203, R204, R205, R206, R209 +6 |
| 1 | RC0603FR-071KL 1k | R_0603_1608Metric | R207 |
| 1 | RC0603FR-0712KL 12k 1% | R_0603_1608Metric | R208 |
| 6 | RC0603FR-0710KL 10k | R_0603_1608Metric | R211, R212, R213, R504, R505, R506 |
| 1 | RC0603FR-072K2L 2.2k | R_0603_1608Metric | R215 |
| 2 | RC0603FR-07100KL 100k | R_0603_1608Metric | R216, R217 |
| 2 | RC0603FR-074R7L 4.7 | R_0603_1608Metric | R218, R226 |
| 10 | RC0603FR-0749K9L 50k | R_0603_1608Metric | R219, R220, R221, R222, R223, R227, R228, R229 +2 |
| 1 | RC0603FR-0756K2L 56.2k 1% | R_0603_1608Metric | R224 |
| 1 | RC0603FR-0720KL 20k | R_0603_1608Metric | R225 |
| 1 | RC0603FR-078K06L 8.06k 1% | R_0603_1608Metric | R232 |
| 4 | RC0603FR-07499KL 499k 1% | R_0603_1608Metric | R301, R304, R307, R310 |
| 1 | RC0603FR-07511KL 511k 1% | R_0603_1608Metric | R302 |
| 4 | RC0603FR-07162KL 162k 1% | R_0603_1608Metric | R303, R306, R309, R312 |
| 1 | RC0603FR-07200KL 200k 1% | R_0603_1608Metric | R305 |
| 1 | RC0603FR-07143KL 143k 1% | R_0603_1608Metric | R308 |
| 1 | RC0603FR-0740R2L 40.2 1% | R_0603_1608Metric | R311 |
| 4 | RC0603FR-07680RL 680 | R_0603_1608Metric | R405, R406, R407, R408 |
| 1 | RC0603FR-07240RL 240 | R_0603_1608Metric | R501 |
| 1 | RC0603FR-0788R7L 89 1% | R_0603_1608Metric | R502 |
| 1 | RC0603FR-0747KL 47k | R_0603_1608Metric | R503 |
QSIC design files
The KiCad project lives in the dabridgham/QSIC repository on GitHub; these links point at the commit this page was built from.
- Layoutqsic.kicad_pcb
- Schematicqsic.kicad_sch
QSIC: common questions
What microcontroller does the QSIC use?
The QSIC is built around the XC7A75T-2FGG484, from the FPGA family.
How big is the QSIC PCB?
The QSIC measures 214.1 × 131.8 mm, has 6 copper layers and is 1.6 mm thick.
How many components are on the QSIC?
212 components, from 56 distinct parts. The full bill of materials is listed on this page.
Where can I download the QSIC design files?
From the dabridgham/QSIC repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the QSIC design in my own project?
The repository has no license, so all rights stay with dabridgham. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the QSIC without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug FPGA firmware against it before you order a PCB.
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