Schematic Design Review Checklist

flux

1:52

Consult.

Analyzing the schematic.

Running design review.

Reviewing the bill of materials.

Looking for "Typical Application circuit and external components (capacitors, resistors) requirements" in fusb302b-d.pdf

Looking for "VDD supply decoupling capacitor recommendation" in fusb302b-d.pdf

Looking for "I2C SCL SDA pull-up resistor requirement" in fusb302b-d.pdf

Looking for "INT_N pin description and required pull-up or connection guidance" in fusb302b-d.pdf

Looking for "VCONN pins description and whether they may be tied to VDD" in fusb302b-d.pdf

Schematic-level issues observed (actionable) 1) Floating / unconnected interface nets (logic + connectivity)
These nets are only connected to the IC pin and do not connect to the corresponding net portals, so they are effectively not routed anywhere else:
  • I2C clock net: U1 SCL appears only on Net (U1 - SCL) (only U1:SCL). The SCL portal is present but not actually connected to that net.
  • I2C data net: U1 SDA appears only on Net (SDA - P1) (only U1:SDA). The SDA portal is present but not connected.
  • Interrupt net: U1 INT_N appears only on Net (U1 - INT_N) (only U1:INT_N). The FUSB302_INT portal is present but not connected.
Correction
2) USB2 D+/D- host-side not connected (signal path incomplete)
Your D+/D- path currently terminates at the ESD/series-resistor node and never reaches the named net portals:
  • D+ path: Net (USB type-C - DP1) includes connector DP pins and R3 P1, but R3 P2 only connects to D1 IO4 on Net (D1 - IO4). The USB_D portals exist but are not connected to either side of R3.
  • D- path: Net (USB type-C - DN2) includes connector DN pins and R1 P1, but R1 P2 only connects to D1 IO3 on Net (R1 - P2). The USB_D- portals exist but are not connected.
Correction
  • Connect the host-side net portals to the series-resistor/ESD node:
3) Missing required pull-ups (datasheet-backed)
Per the U1 datasheet guidance:
  • I2C pull-ups missing: There are no resistors pulling up SCL/SDA to a supply rail. Datasheet “Recommended Component Values” calls for I2C pull-up resistors (typ 4.7 kΩ) to a pull-up voltage between 1.71 V and VDD.
  • INT_N pull-up missing: INT_N is an open-drain output and needs an external pull-up. Datasheet reference schematic shows an INT_N pull-up (min 1.0 kΩ, typ 4.7 kΩ).
Correction
  • Add two pull-ups (SCL, SDA) and one pull-up (INT_N) to the appropriate pull-up rail used by your host MCU (within the datasheet’s allowed pull-up range).
4) Power/decoupling: incomplete VDD decoupling (datasheet-backed)
On the U1 VDD net (Net (U1 - VDD)), you have only:
  • C2 = 0.1 µF to GND.
The datasheet explicitly calls out two VDD decouplers:
  • CVDD1 = 0.1 µF (typ)
  • CVDD2 = 1.0 µF (typ)
Correction
  • Add a 1.0 µF capacitor from VDD to GND in addition to C2, and place it as the second VDD decoupler for U1.
5) VCONN supply is tied into VDD net (likely incorrect per datasheet intent)
In your schematic, U1 VCONN pins (12, 13) are connected to Net (U1 - VDD) (same net as VDD pins 3, 4).
The datasheet description indicates VCONN is a regulated input intended to be switched onto the CC pin as VCONN, and the reference schematic shows VCONN as a separate supply net (with its own decoupling distinct from VDD).
Correction
  • Split U1 VCONN onto its own net/supply (instead of shorting it to VDD), and decouple it per the reference schematic approach.
6) Power net labeling consistency: unused +5V portals
Multiple 5V power net portals exist, but there is no +5V net in the netlist section, meaning they are not actually connected to anything.
Correction
  • Either wire your intended 5 V rail to these 5V portals, or remove/rename them so the schematic has only the rails that are actually used (right now, only Net (VBUS - P1) and Net (U1 - VDD) are real power nets in use).
Items that look electrically connected (no issue observed from connectivity alone)
  • CC pins are consistently tied across connector + controller + ESD + shunt caps:
  • Shield “soft tie” network exists: USB_SHIELD is connected to GND via R2 (10 kΩ) and C5 (0.01 µF).
If you want, I can turn the above into a concrete edit checklist (exactly which pins to wire to which portals, and which new resistors/capacitors to add), but I’ll keep it schematic-level as requested.
Check ERC/DRC items
Fix I2C/INT nets
Connect USB D+/D-
Add missing pull-ups
Add 1uF decoupler
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2
USB_D+
CC2
USB_SHIELD
USB_D-
CC2
CC2
SDA
SCL
CC1
CC1
CC2
FUSB302_INT
R3
Resistance
22 Ω
C4
Capacitance
330pF
R1
Resistance
22 Ω
C3
Capacitance
330pF
VBUS
VBUS
+5V
+5V
U1
Manufacturer Part Number
FUSB302BMPX
USB type-C
Manufacturer Part Number
TYPE-C-31-M-12
  • 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 ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #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, 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
    jharwinbarrozo
    1.5M
  • Generic Inductor
    Generic Inductor
    A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
    jharwinbarrozo
    15.8k
  • 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

USB Type-C FUSB302 Template

USB Type-C FUSB302 Template thumbnail
Programmable USB Type‐C Controller with Power Delivery(PD) support. Include ESD Protection Diodes. #project-template #USB #typec #powerdelivery #template

Properties

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Pricing & Availability

Distributor

Qty 1

Digi-Key

$0.47–$1.21

LCSC

$2.32

Mouser

$1.21

Controls