CT520012 Footprint Check


You’re right to challenge that claim. I need to reopen the Linear issue and the Stewart CT520012 mechanical drawing, then verify each B1–B12 and mid-plate GND position against the drawing’s pad/hole callouts. That requires live research access in Agent mode; I won’t treat the quoted statement as valid until it is reverified.
In https://linear.app/buildwithflux/issue/FLUX-13721/part-quality-issue-ss-52400-003
you mentioned:
Flux footprint models the B1-B12 contact row and two mid-plate GND pads as top-side circular SMD pads without drills. Stewart CT520012 drawing specifies these 14 positions as 0.40 mm plated THRU holes with 0.65 mm lands; only A1-A12 are 0.30 mm SMT lands.
I checked the datasheet and looks like you made a false claim, check it again
I’ll re-check the Linear report, the CT520012 drawing’s recommended PCB layout and legends, and the actual Flux pad definitions before stating a correction.
I’m comparing the drawing’s symbol legend and callout leaders—not just the apparent circles—because that is where the earlier interpretation likely failed.
You’re correct—the Linear claim is false.
The Flux footprint source explicitly defines B1–B12 plus G1/G2 as:
  • thru_hole circle
  • 0.65 mm pad
  • 0.40 mm drill
The inspection incorrectly treated the rendered child-pad data—which omitted inherited drill fields—as the footprint source of truth. No footprint defect is established, and FLUX-13721 should be corrected or closed. Sorry for the false report.

VBUSA1
VBUSB1
GNDB1
CC1
SSTXN1
GND/SHIELD
GND/SHIELD
GND/SHIELD
DP1
GND/SHIELD
SSTXN2
VBUSA2
DN2
GND/SHIELD
DN1
CC2
SSRXN1
SSRXN2
SSTXP1
SSRXP2
DP2
GNDB2
GNDA1
GND/SHIELD
GNDA2
VBUSB2
GND/SHIELD
SBU2
SSRXP1
SSTXP2
SBU1
GND/SHIELD
Name
Pin #
Type
Bus Group
Bus Type
Controlled Impedance
Controlled Impedance Pair
Controlled Impedance Tolerance
GNDA1
A1
Ground
SSTXP1
A2
Bi-Directional
SS_BUS_1
USB 3.0
90Ω
TX1
10%
SSTXN1
A3
Bi-Directional
SS_BUS_1
USB 3.0
90Ω
TX1
10%
VBUSA1
A4
Power Out
CC1
A5
Bi-Directional
DP1
A6
Bi-Directional
USB_BUS1
USB 2.0
90Ω
HS_USB_1
7.5%
DN1
A7
Bi-Directional
USB_BUS1
USB 2.0
90Ω
HS_USB_1
7.5%
SBU1
A8
Bi-Directional
VBUSA2
A9
Power Out
SSRXN2
A10
Bi-Directional
SS_BUS_2
USB 3.0
90Ω
RX2
10%
SSRXP2
A11
Bi-Directional
SS_BUS_2
USB 3.0
90Ω
RX2
10%
GNDA2
A12
Ground
GNDB1
B1
Ground
SSTXP2
B2
Bi-Directional
SS_BUS_2
USB 3.0
90Ω
TX2
10%
SSTXN2
B3
Bi-Directional
SS_BUS_2
USB 3.0
90Ω
TX2
10%
VBUSB1
B4
Power Out
CC2
B5
Bi-Directional
DP2
B6
Bi-Directional
USB_BUS2
USB 2.0
90Ω
HS_USB_2
7.5%
DN2
B7
Bi-Directional
USB_BUS2
USB 2.0
90Ω
HS_USB_2
7.5%
SBU2
B8
Bi-Directional
VBUSB2
B9
Power Out
SSRXN1
B10
Bi-Directional
SS_BUS_1
USB 3.0
90Ω
RX1
10%
SSRXP1
B11
Bi-Directional
SS_BUS_1
USB 3.0
90Ω
RX1
10%

SS-52400-003