COM-HPC Carrier Layout
Thought for 15 sec
I’ll update Version 5.0 front-view visuals only so the Compute Module is drawn with correct 90 mm × 100 mm proportions and occupies the appropriate larger area. Version 4.0 stays locked.
Worked for 3 mins 46 sec
Thought for 26 sec
Created image.
You can move the component labels off to the side of the PCB
Worked for 4 mins 54 sec
Redone for Tiny Tim Version 5.0 front view.
Changes applied:
- Compute Module is shown much larger with intended 90 mm × 100 mm proportions.
- Carrier board remains 105 mm × 115 mm.
- Labels moved off the PCB as side callouts to reduce clutter.
- Version 4.0 remains locked and unchanged.
Updated file:
Updated Front View
Image
Redo rear and review
Lock Version 5.0
Compare front views
Check label accuracy
Improve compute module fit
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Tiny Tim Version 3.0 Size Optimization Estimate
Summary
The minimum practical Tiny Tim Version 3.0 carrier-card size cannot be finalized until exact datasheets/footprints and COM-HPC Mini type connector keepouts are selected. Based on the current locked Version 3.0 constraints, the main hard limiter is the Compute Module 90 mm x 100 mm area plus connector/cable clearance, mounting, and routing escape room.
Current Starting Size
- Current concept/start size: 115 mm x 120 mm
- Compute module reference area: 90 mm x 100 mm
- Primary goal: reduce card size while preserving vertical receptacle access and rear M.2/PCIe expansion.
Major Size Drivers
Table
| Constraint | Impact on minimum board size |
|---|---|
| Compute Module 90 x 100 | Sets the dominant minimum rectangular area |
| COM-HPC Mini type connector/keepout | Exact keepouts TBD; likely prevents reducing directly to 90 x 100 |
| Front vertical receptacles | Need top-entry cable finger clearance and body-to-body spacing |
| 2x vertical RJ45 10GbE | Large connector footprints and height; may dominate one edge/zone |
| 3x USB-A + 3x USB-C + TBT + HDMI | High connector density; vertical receptacles still need keepout spacing |
| 3x 22-pin CSI FFC + 4x Fakra GMSL | Adds front-side connector area and routing congestion |
| Rear M.2 E/B-key 2230 | Fits within 90 x 100 envelope if placed efficiently |
| Rear M.2 M/B-key 2280 | 80 mm card length is a hard rear-side planning constraint |
| Rear PCIe x4 / USB FFC | Small, but needs Z-axis cable clearance |
| Routing for PCIe/USB/10GbE/CSI | May require width/height margin beyond pure mechanical footprint packing |
Estimated Minimum Dimensions
Conservative achievable target
105 mm x 115 mm
This is the most realistic near-term reduction target without exact mechanical data. It preserves about 7.5 mm average margin around the 90 x 100 compute-module envelope, giving room for connector bodies, mounting/keepout, routing escape, and manufacturing tolerance.
Aggressive target after footprint validation
100 mm x 110 mm
This may be possible if:
- COM-HPC Mini type keepouts are favorable.
- Vertical connector footprints can be tightly packed.
- Rear M.2 2280 can be placed fully within the outline without conflicting with the compute module/connector zone.
- High-speed routing escape is feasible with an appropriate stackup.
- Connector overhangs, cable bends, and assembly access are acceptable.
Absolute lower-bound concept
95 mm x 105 mm
This is a theoretical lower bound, not a recommended commitment. It leaves only about 2.5 mm margin around a 90 x 100 module reference area, which is likely too tight once real connector keepouts, mounting holes, edge clearances, and high-speed routing constraints are applied.
Recommendation
Use the following staged optimization plan:
- Keep 115 mm x 120 mm as the safe working outline for first real footprint placement.
- After exact footprints are selected, attempt 105 mm x 115 mm as the first optimized board outline.
- If placement and routing remain clean, attempt 100 mm x 110 mm.
- Treat anything below 100 mm x 110 mm as high-risk until the COM-HPC Mini type mechanical keepout, connector datasheets, and high-speed routing stackup are verified.
Current Best Estimate
The best minimum practical target for Tiny Tim Version 3.0 is:
105 mm x 115 mm recommended minimum target
100 mm x 110 mm aggressive stretch target
Do not lock final dimensions until exact connector footprints and COM-HPC Mini type mechanical keepouts are verified.
Open Items Needed for Final Dimension Lock
- Exact COM-HPC Mini type connector part number and mechanical keepout drawing.
- Exact vertical RJ45, USB-A, USB-C, HDMI, TBT, JST-GH, FFC, Fakra, XT60/XT30, and PicoBlade datasheets/footprints.
- Mounting hole requirements.
- Minimum edge clearance and connector-to-connector spacing rules.
- Stackup and high-speed routing constraints for PCIe, USB, 10GbE, HDMI, CSI, and TBT.
Summary
Current Starting Size
Major Size Drivers
Estimated Minimum Dimensions
Conservative achievable target
Aggressive target after footprint validation
Absolute lower-bound concept
Recommendation
Current Best Estimate
Open Items Needed for Final Dimension Lock
