4 layers177 × 152.1 mm
6 layers45 × 15 mm
LogiBlock
Clamentos/LogiBlockA basic discrete FPGA logic cell
- Size
- 45 × 15 mm
- Copper layers
- 6
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 40
- Pads
- 132
- Tracks, vias
- 229, 44
- Pours
- 110
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 18 Oct 2025
- Updated
- 18 Jun 2026
Overview
LogiBlock is an open-source printed circuit board by Clamentos, from the Clamentos/LogiBlock repository on GitHub, published under the CC-BY-SA-4.0 licence. It is a 6-layer board of 45 × 15 mm with 25 parts on 40 nets, routed with 229 tracks and 44 vias.
It is built around the 74HC151D, 74HC164 and 74LVC1G157GV, with the 74LVC1G74GT among its other parts. Its parts include 8 capacitors, 7 ICs, 3 resistors, 3 diodes and 3 connectors. It belongs with the fPGA and programmable logic boards of this library.
Main components
4
74HC151D
SOIC-16-40℃~+125℃ 15ns@5V,15pF 2V~6V 40uA 5.2mA 5.2mA 74HC 8/1 Multiplexer Single Supply SOIC-16 Signal Switches, Multiplexers, Decoders ROHSToshibaSignal Switches / Encoders & Decoders / Multiplexers
74HC164
SOP-140℃~+70℃ 1 24ns@5V,16pF 2V~6V 74HC 8 Serial-to-Parallel SOP-14 Shift Registers ROHSGRShift Registers
74LVC1G157GV
TSOP-6-1.5mm-40℃~+125℃ 1.65V~5.5V 2.7ns@3.3V,50pF 2/1 32mA 32mA 4uA 74LVC Multiplexer Power-off protection、Level shifting Single Supply TSOP-6-1.5mm Signal Switches, Multiplexers, Decoders ROHSNexperiaSignal Switches, Multiplexers, Decoders
74LVC1G74GT
XSON-8(1x2)-40℃~+125℃ 1 1 1.1ns 1.65V~5.5V 1ns 200MHz 32mA 32mA 4.1ns@5V,50pF 40uA 4pF 74LVC Series Asynchronous Complementary type D-Type Rising Edge Set and Reset XSON-8(1x2) Flip Flops ROHSNexperiaFlip Flops
README
README.mdLogi-Block
A simple, small, FPGA inspired, breadboardable logic cell implemented with discrete SMD components. It is composed of a fracturable 4-input LUT and a D-type flip-flop. It can perform any 4-to-1 or 4-to-2 boolean function and it can optionally store the result in its flip-flop. Logi-Block is programmable serially and can be combined with others to implement any logic circuit.
Board revision 2
Manufacturing
Production files are provided in the releases section. For JLCPCB, the following files can be used:
Logi-Block_2.zip: ZIP containing the gerber files.bom.csv: The bill of materials CSV file.positions.csv: The component placement position CSV file.
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 470n | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4, C5, C6, C7 |
| 3 | LED_Filled | LED_SMD:LED_0603_1608Metric | D1, D2, D3 |
| 2 | 3K | Resistor_SMD:R_0603_1608Metric | R2, R3 |
| 2 | 74HC151 | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U1, U2 |
| 2 | 74HC164 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U6, U7 |
| 2 | 74LVC1G157 | Package_TO_SOT_SMD:SOT-363_SC-70-6 | U3, U4 |
| 1 | 4.70u | Capacitor_SMD:C_1206_3216Metric | C8 |
| 1 | 4.7K | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 74LVC1G74 | CustomFootprints:XSON-8_L2.0-W1.0-P0.50-BL-A | U5 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical_SMD_Pin1Left | J1 |
| 1 | Conn_02x03_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical_SMD | J2 |
| 1 | Conn_02x08_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x08_P2.54mm_Vertical_SMD | J3 |
The 24 most common of 25 parts.
Questions
How big is the LogiBlock PCB?
It measures 45 × 15 mm and has 6 copper layers, 1.6 mm thick.
What parts does the LogiBlock use?
25 parts, built around the 74HC151D, 74HC164, 74LVC1G157GV and 74LVC1G74GT. 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 LogiBlock KiCad files?
From the Clamentos/LogiBlock repository on GitHub, at the commit this page was made from: the board is logi_block/logi_block.kicad_pcb and its schematic logi_block/logi_block.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the LogiBlock design in my own project?
Its repository publishes it under the CC-BY-SA-4.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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