TI-CUBE-CPU
About the TI-CUBE-CPU PCB
TI-CUBE-CPU is an open source PCB design by VE7PMC, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 99.7 × 99.7 mm, with 43 components from 26 distinct parts.
Other key parts include the TIM 9904, TMS 9901, ICL7660, TMS 9900 and ATF16V8B-15PU. By type, the board carries 15 capacitors, 14 resistors, 5 ICs, 2 switches, 2 diodes and 1 crystal.
It belongs with the test & measurement designs in this gallery.
From the project
A homebrew microcomputer system based on the Texas Instruments TMS 9900 CPU.
These folders contain the schematic and PCB design files for the four boards and backplane in KiCad 9.0.7 format.
Main components on the TI-CUBE-CPU
TI-CUBE-CPU bill of materials (BOM)
43 components, 26 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TIM 9904 | DIP-20_W7.62mm | U1 |
| 1 | TMS 9901 | DIP-40_W15.24mm | U2 |
| 1 | ICL7660 | DIP-8_W7.62mm | U3 |
| 1 | TMS 9900 | DIP-64_W22.86mm | U4 |
| 1 | ATF16V8B-15PU | DIP-20_W7.62mm | U5 |
| 1 | 48 MHz | Crystal_HC49-4H_Vertical | Y1 |
| 1 | TI CUBE bus | PinHeader_2x36_P2.54mm_Horizontal | J1 |
| 1 | RESET | SW_SPST_Omron_B3F-315x_Angled | SW1 |
| 1 | LOAD | SW_SPST_Omron_B3F-315x_Angled | SW2 |
| 1 | USER1 | TestPoint_THTPad_D1.5mm_Drill0.7mm | USER1 |
| 1 | USER2 | TestPoint_THTPad_D1.5mm_Drill0.7mm | USER2 |
| 1 | RESET | LED_D3.0mm_Horizontal_O1.27mm_Z2.0mm | D1 |
| 1 | CPU ACTIVITY | LED_D3.0mm_Horizontal_O1.27mm_Z2.0mm | D2 |
| 1 | 0.47 uH | L_Axial_L6.6mm_D2.7mm_P2.54mm_Vertical_Vishay_IM-2 | L1 |
| 1 | 18 pF | C_Ceramic_Cap_P2.50mm | C1 |
| 1 | 47 uF | CP_Radial_D5.0mm_P2.50mm | C2 |
| 9 | 0.1 uF | C_Ceramic_Cap_P2.50mm | C3, C5, C6, C8, C10, C11, C12, C13 +1 |
| 1 | 22 uF | CP_Radial_D5.0mm_P2.50mm | C4 |
| 2 | 10 uF | CP_Radial_D5.0mm_P2.50mm | C7, C9 |
| 1 | 1 uF | CP_Radial_D5.0mm_P2.50mm | C15 |
Show 6 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 130 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 4 | 4.7k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R8, R9, R10 |
| 1 | 1k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 4 | 18 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4, R5, R6, R7 |
| 2 | 470 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R11, R12 |
| 2 | 4.7k | R_Array_SIP9 | RN1, RN2 |
TI-CUBE-CPU design files
The KiCad project lives in the VE7PMC/TI-CUBE repository on GitHub; these links point at the commit this page was built from.
TI-CUBE-CPU: common questions
How big is the TI-CUBE-CPU PCB?
The TI-CUBE-CPU measures 99.7 × 99.7 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the TI-CUBE-CPU?
43 components, from 26 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the TI-CUBE-CPU design files?
From the VE7PMC/TI-CUBE repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the TI-CUBE-CPU design in my own project?
Yes, under the terms of its GPL-3.0 license, which VE7PMC chose for the repository.
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