QSIC
About the QSIC PCB
QSIC is an open source FPGA PCB design by dabridgham, published on GitHub. It is a 4-layer board measuring 214.1 × 131.8 mm, with 174 components from 47 distinct parts.
Its main chip is the XC7A75T-CSG324, from the FPGA family. Other key parts include the IS43TR16128B, MT25Q-mlq8, TPS2561, MAX3033E and USB3340. By type, the board carries 64 capacitors, 62 resistors, 32 ICs, 9 diodes, 5 connectors and 1 crystal.
It belongs with the retro computing designs in this gallery.
From the project
QBUS Storage and I/O Card
Main components on the QSIC
QSIC bill of materials (BOM)
174 components, 47 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | XC7A75T-CSG324 | BGA-324_15.0x15.0mm_Layout18x18_P0.8mm_Ball0.5mm_Pad0.4mm_NSMD | U101 |
| 1 | IS43TR16128B | BGA-96_9.0x13.0mm_Layout2x3x16_P0.8mm | U301 |
| 1 | MT25Q-mlq8 | DFN-8-1EP_6x5mm_P1.27mm_EP4x4mm | U501 |
| 1 | TPS2561 | VSON-10-1EP_3x3mm_P0.5mm_EP1.65x2.4mm_ThermalVias | U502 |
| 1 | MAX3033E | TSSOP-16_4.4x5mm_P0.65mm | U503 |
| 1 | USB3340 | QFN-32-1EP_5x5mm_P0.5mm_EP3.45x3.45mm | U504 |
| 11 | DS8641-small | DIP-16_W7.62mm | U601, U602, U603, U604, U605, U606, U607, U608 +3 |
| 11 | 74LVC8T245-small | SSOP-24_5.3x8.2mm_P0.65mm | U621, U622, U623, U624, U625, U626, U627, U628 +3 |
| 4 | TPS82085 | Texas_SIL0008D_MicroSiP-8-1EP_2.8x3mm_P0.65mm_EP1.1x1.9mm_ThermalVias | U1304, U1305, U1306, U1307 |
| 1 | ASE-24.000MHz | Oscillator_SMD_Abracon_ASE-4Pin_3.2x2.5mm | X501 |
| 1 | Conn_02x07_Odd_Even | PinHeader_2x07_P2.00mm_Vertical | J102 |
| 1 | SD 0 | microSD_HC_Hirose_DM3BT-DSF-PEJS | J301 |
| 1 | SD 1 | microSD_HC_Hirose_DM3BT-DSF-PEJS | J302 |
| 1 | USB_A | USB-A-Amphenol-UE27 | J501 |
| 1 | Indicator Panel | Box_Header_2x05_P2.54mm | P501 |
| 1 | Config | SW_DIP_SPSTx08_Slide_6.7x21.88mm_W7.62mm_P2.54mm_LowProfile | S501 |
| 9 | green | LED_0603_1608Metric | D101, D501, D502, D503, D504, D505, D506, D507 +1 |
| 4 | 10µF | C_0603_1608Metric | C301, C306, C508, C512 |
| 44 | 100nF | C_0603_1608Metric | C302, C303, C304, C305, C309, C311, C501, C503 +36 |
| 2 | 10uF | C_0603_1608Metric | C307, C502 |
Show 27 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 6 | 22µF | C_0805_2012Metric | C308, C310, C1310, C1312, C1314, C1316 |
| 1 | 150µF | CP_Elec_6.3x5.7 | C504 |
| 2 | 1µF | C_0603_1608Metric | C509, C510 |
| 1 | 10nF | C_0603_1608Metric | C511 |
| 4 | 10µF | C_0805_2012Metric | C1311, C1313, C1315, C1317 |
| 10 | 240 | R_0603_1608Metric | R101, R301, R504, R505, R506, R507, R508, R509 +2 |
| 4 | 4.7k | R_0603_1608Metric | R102, R103, R501, R502 |
| 2 | 10k | R_0603_1608Metric | R104, R105 |
| 1 | 89 | R_0603_1608Metric | R302 |
| 1 | 47k | R_0603_1608Metric | R303 |
| 2 | 47 1% | R_0603_1608Metric | R304, R305 |
| 10 | 50k | R_0603_1608Metric | R306, R307, R308, R309, R310, R311, R312, R313 +2 |
| 2 | 4.7 | R_0603_1608Metric | R316, R317 |
| 1 | 2.4k | R_0603_1608Metric | R503 |
| 2 | 100k | R_0603_1608Metric | R512, R513 |
| 1 | 56.2k | R_0603_1608Metric | R514 |
| 1 | 20k | R_0603_1608Metric | R515 |
| 1 | 8.06k | R_0603_1608Metric | R516 |
| 4 | 330 | R_0603_1608Metric | R601, R602, R603, R604 |
| 4 | 680 | R_0603_1608Metric | R605, R606, R607, R608 |
| 1 | 511k | R_0603_1608Metric | R1314 |
| 4 | 499k | R_0603_1608Metric | R1315, R1318, R1321, R1324 |
| 4 | 162k | R_0603_1608Metric | R1316, R1319, R1322, R1325 |
| 1 | 200k | R_0603_1608Metric | R1317 |
| 1 | 143k | R_0603_1608Metric | R1320 |
| 1 | 40.2 | R_0603_1608Metric | R1323 |
| 4 | 330/680 | R_Array_SIP12 | RN606, RN607, RN608, RN609 |
QSIC design files
The KiCad project lives in the dabridgham/QSIC-verilog repository on GitHub; these links point at the commit this page was built from.
QSIC: common questions
What microcontroller does the QSIC use?
The QSIC is built around the XC7A75T-CSG324, from the FPGA family.
How big is the QSIC PCB?
The QSIC measures 214.1 × 131.8 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the QSIC?
174 components, from 47 distinct parts. The full bill of materials is listed on this page.
Where can I download the QSIC design files?
From the dabridgham/QSIC-verilog repository on GitHub, which has the KiCad layout; 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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