2 layers268.6 × 120.7 mm
2 layers100 × 100 mm
MiniSys MicroSD
ab0tj/MiniSys7Homebrew computer with an ISA-like bus
- Size
- 100 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 48
- Nets
- 177
- Pads
- 438
- Tracks, vias
- 1,339, 57
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 12 Nov 2019
- Updated
- 24 Aug 2020
Overview
MiniSys MicroSD is an open-source printed circuit board by ab0tj, from the ab0tj/MiniSys repository on GitHub. It is a 2-layer board of 100 × 100 mm with 48 parts on 177 nets, routed with 1,339 tracks and 57 vias.
It is built around the 74LVC125AD, 74LS165PC and 74LS123FP-E, with the 74LS32SC and 74LS393P-E among its other parts. Its parts include 18 capacitors, 11 ICs, 9 resistors, 7 connectors and 1 diode. It belongs with the FPGA and CPLD boards of this library.
Main components
5
74LVC125AD
SOP-14L-40℃~+125℃ 1 1.65V~5.5V 2.6ns@5V,15pF 4 40uA 50mA 50mA 74LVC Schmitt trigger Tri-State Unidirectional SOP-14L Buffers, Drivers, Receivers, Transceivers ROHSMDDBuffers, Drivers, Receivers, Transceivers
74LS165PC
DIP-160.4mA 0℃~+70℃ 105mW 35MHz 4.75V~5.25V 47ns@5V,50pF 8 8mA Asynchronous parallel load function Complementary Parallel-to-Serial DIP-16 Shift RegistersTexas InstrumentsShift Registers74LS123FP-E
-Reset input、Adjustable pulse width、Retriggerable function - Monostable Multivibrators ROHSRenesas ElectronicsMonostable Multivibrators
74LS32SC
-- Logic Gates ROHSTexas InstrumentsLogic Gates
74LS393P-E
DIP-14-20℃~+75℃ 2 35MHz 4 4.75V~5.25V 400mW 40ns@5V,15pF 74LS Binary Counter Reset function DIP-14 Counters, Dividers ROHSRenesas ElectronicsCounters, Dividers
Parts
48| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | .1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C14, C15, C16 |
| 5 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1, R2, R3, R4, R5 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C17, C18 |
| 2 | 33uF | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B_Pad1.50x2.35mm_HandSolder | C12, C13 |
| 2 | 4.7k | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R8, R9 |
| 2 | 470 | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R6, R7 |
| 2 | 74LS165 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U2, U6 |
| 2 | GAL16V8 | Package_LCC:PLCC-20_THT-Socket | U7, U11 |
| 1 | 20MHz | Oscillator:Oscillator_DIP-8 | X1 |
| 1 | 74LS123 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U10 |
| 1 | 74LS138 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U3 |
| 1 | 74LS164 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U4 |
| 1 | 74LS244 | Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm | U5 |
| 1 | 74LS32 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U1 |
| 1 | 74LS393 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U9 |
| 1 | 74LVC125 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U8 |
| 1 | ACT | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | CF0 | Connector_Card:microSD_HC_Hirose_DM3AT-SF-PEJM5 | J3 |
| 1 | CF1 | Connector_Card:microSD_HC_Hirose_DM3AT-SF-PEJM5 | J4 |
| 1 | CTRL | Connector_PinHeader_2.54mm:PinHeader_2x08_P2.54mm_Vertical | J7 |
| 1 | CheapBusTX24-RA | SmacSys-Parts:JAE_TX24-120R-LT-H1E | J1 |
| 1 | LED | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal | J5 |
| 1 | MISO_SR | Connector_PinHeader_2.54mm:PinHeader_2x08_P2.54mm_Vertical | J6 |
| 1 | PORT | Connector_PinHeader_2.54mm:PinHeader_2x07_P2.54mm_Vertical | J2 |
The 47 most common of 48 parts.
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Questions
How big is the MiniSys MicroSD PCB?
It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MiniSys MicroSD use?
48 parts, built around the 74LVC125AD, 74LS165PC, 74LS123FP-E and 74LS32SC. 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 MiniSys MicroSD KiCad files?
From the ab0tj/MiniSys repository on GitHub, at the commit this page was made from: the board is Boards/MicroSD/MiniSys MicroSD.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the MiniSys MicroSD design in my own project?
Its repository states no licence, so its author keeps all rights: ask ab0tj before reusing the design.