IoT PCB Design Specifications

0:00

Work done

Preserved the required 38 mm × 28 mm rectangular PCB outline.
Re-applied the required 4-layer stackup as a custom Standard 4 Layer setup, with the intended Signal / GND / Power / Signal architecture.
Applied compact layout defaults with 0.15 mm trace width and 0.15 mm keepout to support the densest feasible routing attempt.
Attempted dual-sided auto-placement with explicit edge constraints for J1, J2, J3, J4, J5, and J6, including the required opposite-edge placement intent for J4 GNSS U.FL and J5 LTE U.FL.

Success criteria review

✅ Board size remains fixed at 38 mm × 28 mm.
✅ 4-layer stackup setup was applied for the required Signal-GND-Power-Signal intent.
⚠️ Dual-sided placement was attempted, but the placement engine reported the design is physically over capacity.
❌ Full connector placement and compact dual-sided component distribution could not be completed because the footprint area is too large for the fixed board.
❌ Full routing could not be completed because no feasible collision-free placement exists yet.

Blocking issue

The current design has 53 components with total footprint area of about 1928 mm² on a 1064 mm² board, or about 181% fill. The placement engine reports this exceeds even practical dual-sided capacity and recommends at least about 47 mm × 35 mm. Keeping 38 mm × 28 mm while retaining all current footprints is therefore not feasible without reducing component size/count, changing large footprints, or accepting assembly/DRC violations.

Next steps

To proceed, choose one of these paths:

Keep all components and increase the board to about 47 mm × 35 mm or larger, then I can place and route.
Keep 38 mm × 28 mm and reduce footprint area by replacing large placeholders/connectors with smaller exact footprints or depopulating optional sections.
Keep the current board and components only as a mechanical concept, then manually accept overlaps/violations for a non-manufacturable layout preview.

14h

Reviews

Ground
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Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibrary
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Terminal
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875105359001
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Project Name

Description

Requirements update for an IoT PCB module emphasizing compact placement around the main MCU and board-edge connector positioning for easier assembly. Includes mechanical constraints, connector orientation expectations, keep-out guidance, and acceptance criteria for the next layout phase.

Properties

Implemen… Details

Pricing & Availability

Distributor	Qty 1
Arrow	$5.24–$7.89
Digi-Key	$37.15–$45.60
LCSC	$28.86–$29.56
Mouser	$23.00–$23.52
TME	$7.50
Verical	$8.72–$29.08

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