Raspberry Pi 5 HAT Design Discussion

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Checking if I can make the changes for you.

Here’s the components change plan to add the core parts you requested. This turn focuses only on enumerating the parts to add (no wiring yet). I selected specific, industrial-friendly MPNs. If you prefer alternatives (e.g., eFuse vs PTC), say so and I’ll adjust.
Added components

Table

Part NamePurposeManufacturer Part NumberQuantityFootprintDatasheet link
40-pin Pass-through Header (RPi HAT stackable)Provides stackable GPIO connection to Raspberry Pi 5 and pass-through to other HATsM20-610204512×20 THPDF
HAT+ ID EEPROM (3.3 V)Stores HAT identification; connected only to GPIO0/1 with 3.3 V pull-ups24LC32A-I/P1DIP-8/ SOIC-8 (prefer SOIC-8)PDF
I2C Pull-up Resistor 4.7 kΩPull-up on 3.3 V ID bus (GPIO0/1)RC0603FR-074K7L20603PDF
Decoupling Capacitor 100 nFLocal decouple for ID EEPROMCL10B104KB8NNNC10603PDF
I2C Level TranslatorBidirectional I2C translation between Pi 3.3 V and device 5 V bussesPCA9306DCUR1VSSOP-8PDF
I2C Pull-up Resistor 4.7 kΩPull-up on Pi-side I2C1 (3.3 V)RC0603FR-074K7L20603PDF
I2C Pull-up Resistor 4.7 kΩPull-up on device-side I2C (5 V)RC0603FR-074K7L20603PDF
Decoupling Capacitor 100 nFLocal decouple for PCA9306CL10B104KB8NNNC10603PDF
PWM Controller (16-ch, 12-bit)Core PWM engine at 5 V; exposes 6 buffered channels + 10 sparePCA9685PW1TSSOP-28PDF
Address Solder Jumpers (A0..A5)Configure PCA9685 I2C address; default 0x40SJ-3523-SMT63-pad SJPDF
OE Pull-up Resistor 10 kΩHolds OE deasserted by default; optional link to GPIORC0603FR-0710KL10603PDF
Decoupling Capacitor 100 nFLocal decouple for PCA9685CL10B104KB8NNNC10603PDF
Bulk Capacitor ≥47 µFLocal bulk for PCA9685 5 V railEEE-FT1V470AP1SMD ElecPDF
Inverting Schmitt Buffer (hex)Robust 5 V output buffering for 6 primary channelsSN74HC14D1SOIC-14PDF
Series Resistor 47 ΩDamping resistor at each buffered output (CH1..CH6)RC0603FR-0747RL60603PDF
Optional RC Cap Pad 0–100 pF (DNP)Edge-rate tuning near connector per channelCL10C100JB8NNNC60603PDF
Low-cap ESD TVS (2-line)Per-channel ESD protection at connector edgeESD9M5V-DL6SOD-923 or DFNPDF
Screw Terminal 3-pos, 5.0 mm, verticalField I/O for each primary channel: PWM, +5 V, GND6911377100036TH 5.0 mmPDF
Spare Channel Series Resistor 220 ΩSeries limit for 10 spare outputs to padsRC0603FR-07220RL100603PDF
Test/Expansion Thru-hole PadsExpose spare channels (DNP connectors)TP_TH_1.0mm10TH pad___
Decoupling Capacitor 100 nFLocal decouple for SN74HC14CL10B104KB8NNNC10603PDF
External 5 V Input Terminal (2-pos)Optional field power entry for terminals6911377100021TH 5.0 mmPDF
Resettable Fuse PTC (hold ~1.1 A)Protect external 5 V input pathMF-MSMF110/16X11206PDF
TVS Diode SMBJ5.0ASurge/ESD at external 5 V entrySMBJ5.0A1SMBPDF
Power Inductor 1 µH ≥1 ALC filter for external 5 VSRN4018-1R0M14.0×4.0 mmPDF
Ceramic Capacitor 10 µF, 25 V X7RLC filter output decouplingCL10A106MQ8NNNC10603PDF
Bulk Capacitor 100 µFExternal 5 V bulk after filterEEE-FT1E101AP1SMD ElecPDF
0 Ω Link (DNP)Backfeed link between filtered 5 V and Pi 5 V (default open)RC0603JR-070RL10603PDF
Solder Bridge (OE to GPIO option)Optional route OE to Pi GPIO for global muteSJ-3523-SMT13-pad SJPDF
Notes
  • If you’d rather use an eFuse (integrated OCP/OVP) instead of a PTC, I can swap the PTC line item for a common eFuse (e.g., TPS2595x family) and add its passives.
  • If you prefer SN74AHC14 for sharper edges, I can substitute it one-for-one.
  • Test pad symbol is a placeholder; we’ll place 10 labeled pads for spare channels.
Would you like me to proceed with wiring the connection skeleton in the next step after these components are added?
121 days

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J1
+5V
PCIE_PWR_EN
PCIE_CLK_N
PCIE_RX_P
PCIE_RX_N
PCIE_CLK_P
PCIE_TX_P
PCIE_CLKREQ_N
PCIE_TX_N
PCIE_DET_WAKE
PCIE_RST_B
  • Ground
    Ground
    A common return path for electric current. Commonly known as ground.
    jharwinbarrozo
    20.5M
  • Net Portal
    Net Portal
    Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
    jharwinbarrozo
    43.0M
  • Power Net Portal
    Power Net Portal
    Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
    jharwinbarrozo
    11.4M
  • Generic Resistor
    Generic Resistor
    A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
    jharwinbarrozo
    1.5M
  • Generic Capacitor
    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 10,000uF 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 20pF 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
    jharwinbarrozo
    1.5M
  • Generic Inductor
    Generic Inductor
    A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
    jharwinbarrozo
    15.1k
  • Terminal
    Terminal
    An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
    natarius
  • RMCF0805JT47K0
    RMCF0805JT47K0
    47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
    jharwinbarrozo
    1.2M
  • 875105359001
    875105359001
    10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
    jharwinbarrozo
    1.2M
  • CTL1206FYW1T
    CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
    jharwinbarrozo
    1.1M

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Raspberry Pi 5 Hat with PCIe Template

Raspberry Pi 5 Hat with PCIe Template
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Last updated by marckizz
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marckizz

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