2 layers57.1 × 143.5 mm
2 layers
Code bits of the TTL breadbord RISC-V
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 35
- Nets
- 256
- Pads
- 676
- Tracks, vias
- 1,070, 217
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 26 Oct 2021
- Updated
- 27 May 2023
Overview
Csr is an open-source printed circuit board by magik6k, from the magik6k/breadv repository on GitHub. It is a 2-layer board with 35 parts on 256 nets, routed with 1,070 tracks and 217 vias.
It is built around the 74HCT541D, 74LS377PC and 74HC688D. Its parts include 22 ICs, 8 connectors and 3 switches.
Main components
3
74HCT541D
SO-20-40℃~+125℃ 1 15ns@4.5V,50pF 160uA 4.5V~5.5V 6mA 6mA 74HCT 8 Tri-State Unidirectional SO-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers
74LS377PC
PDIP-200℃~+70℃ 1 10ns 25ns@5V,15pF 28mA 30MHz 4.75V~5.25V 400uA 5ns 74LS Series 8 8mA D-Type Rising Edge Synchronous PDIP-20 Flip Flops ROHSTexas InstrumentsFlip Flops74HC688D
SOIC-20-300mil-40℃~+125℃ 0.1V 0.5V、1.35V、1.8V 1.2V、2.4V、3.2V 1.9V、4.4V、5.9V 160uA 16ns@6.0V,50pF 2V~5V SOIC-20-300mil Digital Comparators ROHSNexperiaDigital Comparators
Parts
35| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 74HCT541 | Package_DIP:DIP-20_W8.89mm_SMDSocket_LongPads | U2, U4, U5, U7, U9, U10, U12, U14, U15, U16, U19, U20 |
| 8 | 74LS377 | Package_DIP:DIP-20_W8.89mm_SMDSocket_LongPads | U1, U3, U6, U8, U11, U13, U17, U18 |
| 4 | Conn_01x10_Female | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J1, J4, J5, J6 |
| 3 | SW_Coded_SH-7050 | Button_Switch_SMD:Nidec_Copal_SH-7010A | SW1, SW2, SW3 |
| 2 | 74HC688 | Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm | U21, U22 |
| 2 | Conn_01x40_Female | Connector_PinHeader_2.54mm:PinHeader_1x40_P2.54mm_Vertical | J2, J3 |
| 2 | Conn_01x40_Male | Connector_PinHeader_2.54mm:PinHeader_1x40_P2.54mm_Vertical | J7, J8 |
| 2 | R_Network08 | Resistor_THT:R_Array_SIP9 | RN1, RN2 |
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Questions
What parts does the Csr use?
35 parts, built around the 74HCT541D, 74LS377PC and 74HC688D. 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 Csr KiCad files?
From the magik6k/breadv repository on GitHub, at the commit this page was made from: the board is pcbs/csr/csr.kicad_pcb and its schematic pcbs/8view-out/8view-out.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Csr design in my own project?
Its repository states no licence, so its author keeps all rights: ask magik6k before reusing the design.