Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

SMA TVS not connected to +3.3V #91

Open
wisxxx opened this issue Mar 5, 2023 · 1 comment
Open

SMA TVS not connected to +3.3V #91

wisxxx opened this issue Mar 5, 2023 · 1 comment

Comments

@wisxxx
Copy link

wisxxx commented Mar 5, 2023 •
edited
Loading

The transient voltage suppressors (TVS), IC's CR4 and CR5 (schematic sht. 23, D12 and H12) are not connected to +3.3V (net XP3R3V_FPGA), thus offer no protection for the '125 buffers against positive voltage spikes on the SMA inputs.

(production board)
@wisxxx
Copy link
Author

wisxxx commented Mar 7, 2023

Likewise for CR6 and CR7 on the external JTAG connector (sht. 10, L4 and L5).

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Assignees
No one assigned
Labels
None yet
Projects
None yet
Milestone
No milestone
Development

No branches or pull requests
1 participant
@wisxxx