All Questions
384 questions
2 votes
1 answer
230 views
What is the correct way to deal with circular PCB ground planes
Let's say I have a 2 later circular PCB with some components on it. Nothing high speed. I want to have ground plane on it with proper stitching. In proposition A, there is a continuous ground plane on ...
1 vote
0 answers
38 views
Routing MIPI-CSI 2 using 31p two-sides contacts connector
Does anyone know best practices for routing these types of connectors? My problem is that this type of connector requires vias. Firstly, I can't place the vias far apart from the D+ and D- pins (they'...
1 vote
1 answer
99 views
Rule for 5W Routing Differential Pair
I am working on a high speed design. To reduce the cross talk between the signals I need to implement a 5W rule (which means that the spacing between the signal pairs must be a minimum of 5 times the ...
- 117
1 vote
0 answers
71 views
Altium designer bus duplicate net names in hierarchical schematic
I have a Design with several subsheets. I'm having issues connecting i2c buses. Two sheets contain buses named IIC_SDA[1..25] and IIC_SCL[1..25]. When both of these sheets are placed inside the top ...
- 31
1 vote
1 answer
115 views
Altium, via splitting instead of through-hole via
My question is regarding vias/routing. As you can see in the picture I want to have a via from the top to the bottom layer. The problem is that Altium always splits these, in fact through-hole via, ...
1 vote
0 answers
72 views
Handling Dead Copper in Internal Power Planes [duplicate]
I am working on a 4-layer PCB (1200 mil × 1000 mil) with TOP, GND, 3.3V midlayer, and Bottom. I encountered a situation where, if I pour the polygon all over the entire midlayer while removing dead ...
- 45
5 votes
3 answers
372 views
PCB design for audio compressor – THT routing, GND plane and power tracks
I’m working on a PCB design for an audio compressor. I don’t have much prior experience with PCB layout, so I’d really appreciate any advice or feedback you might have. I’ve attached the layout of my ...
1 vote
0 answers
82 views
DDR4 bit, byte, nibble swapping
I’m working on a DDR4 PCB layout and want to confirm the allowed rules for bit swapping, byte lane swapping, and nibble swapping, especially when ECC or CRC is enabled. From what I understand so far: ...
1 vote
1 answer
97 views
Questions Regarding PCB wiring from Schematic Design
H-Gate Driver in use: [https://lcsc.com/product-detail/Gate-Drivers_Infineon-IR2101STRPBF_C2956.html] The general issue is connecting components in general on a PCB and if specific tracing is needed ...
- 19
2 votes
2 answers
107 views
How to best route VCC over "pre-magnetic" phy: via or 0R?
I am routing the KSZ8794CNX (https://www.mouser.com/datasheet/2/268/KSZ8794CNX_Data_Sheet_DS00002134-3444409.pdf) in a two layer PCB, and I might need to route its 3.3V and 1.2V through the "pre-...
- 69
6 votes
3 answers
917 views
In this scenario, is it better to have a continuous GND plane or a break in the middle?
I'm implementing a high power converter on a PCB (8A/300W) and I'm unsure which power plane design is better. In this example, I'm unable to move the terminals or any components. Let's use this PCB ...
- 111
0 votes
1 answer
79 views
DDR3 UDIMM dual rank stick design considerations
I am designing a standard 240 pin DDR3 UDIMM PC ram stick for learning purposes. I did quite a lot of research on the DDR3 architecture and PCB layout, but there are still some questions that I can ...
1 vote
1 answer
174 views
DDR3 in a fly-by routing
I recently completed fly-by routing for 2 x DDR3 and a Zynq 7000 chip by studying their app notes or general notes on how to do fly-by routing. Now that I finished the routing then I started having ...
- 359
3 votes
1 answer
133 views
IC power pins are the same voltage, can I route through both decoupling capacitors into the pins?
I am having some trouble with routing the connections to a BMP390 barometer. In order to make more space for the SPI CLK line, I was wondering if it would be OK to route through the decoupling ...
- 315
0 votes
3 answers
113 views
Routing trace after existing a via
In PCB design, 90-degree angles in trace routing are generally discouraged due to potential issues with signal integrity, impedance discontinuities, and fabrication defects. However, I am wondering if ...
- 305