J939-transceiver

karimf1·J939-transceiver

J939-transceiver PCB layout, top view — open source board by karimf1

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About the J939-transceiver PCB

J939-transceiver is an open source PCB design by karimf1, published on GitHub under the MIT license. It is a 2-layer board measuring 100 × 50 mm, with 33 components from 23 distinct parts.

Other key parts include the ISO1042BDWVR and NXE1S0505MC-R7. By type, the board carries 9 capacitors, 7 diodes, 7 resistors, 4 jumpers, 2 ICs and 2 connectors.

It belongs with the rf & radio and dev boards & breakouts designs in this gallery.

From the project

This project is an isolated CAN/J1939 transceiver breakout on a 2-layer board. It includes a DE-9 or terminal block and termination jumper. It demonstrates a complete PCB design workflow: custom symbol/footprint creation, layout, DRC, ordering, hand-soldering, and testing.

A galvanically isolated CAN transceiver on a 100 × 50 mm two-layer board: DE-9 wired to CiA 303-1, a 5-way terminal block carrying the same nets in parallel, split 120 Ω termination on a jumper, and bus-side power generated across the barrier.

The circuit is deliberately trivial — one transceiver, one isolated supply, a connector and two resistors. That is the point. A trivial circuit is the only kind that lets you walk the whole hardware pipeline without the circuit itself becoming the project: a symbol and a footprint drawn by hand from a datasheet, a schematic, a netlist, a board, a…

Main components on the J939-transceiver

ISO1042BDWVR NXE1S0505MC-R7

J939-transceiver bill of materials (BOM)

33 components, 23 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	ISO1042BDWVR Texas Instruments	TI_DWV0008A	U1
1	NXE1S0505MC-R7 NXE1S0505MC Murata Power Solutions	Converter_DCDC_Murata_NXExSxxxxMC_SMD	U2
1	DMG2301L-7 DMG2301L	SOT-23	Q1
1	Host 1x06	PinHeader_1x06_P2.54mm_Vertical	J1
1	MKDS 1,5/5-5.08	TerminalBlock_Phoenix_MKDS-1,5-5_1x05_P5.00mm_Horizontal	J3
1	VCC1 = 5V / 3V3	PinHeader_1x03_P2.54mm_Vertical	JP1
1	VCC2 = DCDC / bus	PinHeader_1x03_P2.54mm_Vertical	JP2
1	TERM 120R	PinHeader_2x02_P2.54mm_Vertical	JP3
1	SHLD hard bond	PinHeader_1x02_P2.54mm_Vertical	JP4
2	BAT54	D_SOD-123	D1, D5
2	SMAJ36CA	D_SMA	D2, D6
2	green	LED_0805_2012Metric	D3, D4
1	5V6	D_SOD-123	D7
1	600R@100MHz	L_0805_2012Metric	FB1
2	4n7	C_0805_2012Metric	C1, C8
3	100n	C_0805_2012Metric	C2, C4, C9
1	1u	C_0805_2012Metric	C3
3	4u7	C_0805_2012Metric	C5, C6, C7
2	60R4 1%	R_0805_2012Metric	R1, R2
2	1k5	R_0805_2012Metric	R3, R6

Show 3 more

Qty	Part	Footprint	Refs
1	100k	R_0805_2012Metric	R4
1	1M	R_0805_2012Metric	R5
1	240R 1%	R_1206_3216Metric	R7

J939-transceiver design files

The KiCad project lives in the karimf1/J939-transceiver repository on GitHub; these links point at the commit this page was built from.

J939-transceiver: common questions

How big is the J939-transceiver PCB?

The J939-transceiver measures 100 × 50 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the J939-transceiver?

33 components, from 23 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 J939-transceiver design files?

From the karimf1/J939-transceiver 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 J939-transceiver design in my own project?

Yes, under the terms of its MIT license, which karimf1 chose for the repository.

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