Pin Function Grouping

adrian95

adrian95

Looking at the datasheet of this component, can you group together pins by their functions? for example for Power, 3v3, gnd_1 gnd_2 etc NOTE: If you group them, can you not add the same pin if you already added them in a group? You should know which pin function is common for its function

flux

I grouped the USB4520 pins by function with no duplicate pin assignments: VBUS, Ground, Shield/Shell, USB2 Data, CC, SBU, and Dummy/NC. Full grouping is in the USB4520-03-0-A Pin Functional Groups project file.
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USB4520-03-0-A Pin Functional Groups
Source: GCT USB4520-03-0-A datasheet / product drawing pin assignment.
Grouping rule used: each physical contact is assigned to exactly one function group. Shared signals such as GND and VBUS are grouped by electrical function, but the same pin/contact is not repeated in any other group.

Table

Function groupPins / contactsSignal namesSuggested Flux SectionSuggested Pin GroupNotes
Power / VBUSA4, A9, B4, B9VBUSPowerVBUSUSB bus power contacts. These are duplicated for Type-C plug orientation and current sharing.
GroundA1, A12, B1, B12GNDGroundGNDMain return contacts. Keep only in Ground, not also in Shield.
Shield / Shell GroundSHELLSHELL / Shield / GNDGroundShieldConnector shell is tied to ground/shield function. Keep separate from signal GND contacts so the mechanical shell terminal is not duplicated.
USB 2.0 DataA6, A7, B6, B7A6 = Dp1 / D+, A7 = Dn1 / D-, B6 = Dp2 / D+, B7 = Dn2 / D-CommunicationUSB2A6 and B6 are the D+ pair duplicates; A7 and B7 are the D− pair duplicates. They are grouped together as USB2, not repeated in separate D+ / D− groups.
Configuration ChannelA5, B5CC1, CC2CommunicationCCUSB Type-C configuration-channel pins.
Sideband UseA8, B8SBU1, SBU2CommunicationSBUSBU pins are present on Type-C even though many USB 2.0-only designs leave them unconnected unless accessory/alternate-mode behavior is needed.
Dummy / No Connect SuperSpeed PositionsA2, A3, A10, A11, B2, B3, B10, B11Dummy / omitted SS contactsNo ConnectDummyThese are the eight dummy positions in the “16 + 8 dummy” USB 2.0 Type-C receptacle. Do not duplicate them under USB2 data.
Per-Contact Assignment Checklist

Table

ContactAssigned groupSignal
A1GroundGND
A2Dummy / No Connect SuperSpeed PositionsDummy / NC
A3Dummy / No Connect SuperSpeed PositionsDummy / NC
A4Power / VBUSVBUS
A5Configuration ChannelCC1
A6USB 2.0 DataDp1 / D+
A7USB 2.0 DataDn1 / D−
A8Sideband UseSBU1
A9Power / VBUSVBUS
A10Dummy / No Connect SuperSpeed PositionsDummy / NC
A11Dummy / No Connect SuperSpeed PositionsDummy / NC
A12GroundGND
B1GroundGND
B2Dummy / No Connect SuperSpeed PositionsDummy / NC
B3Dummy / No Connect SuperSpeed PositionsDummy / NC
B4Power / VBUSVBUS
B5Configuration ChannelCC2
B6USB 2.0 DataDp2 / D+
B7USB 2.0 DataDn2 / D−
B8Sideband UseSBU2
B9Power / VBUSVBUS
B10Dummy / No Connect SuperSpeed PositionsDummy / NC
B11Dummy / No Connect SuperSpeed PositionsDummy / NC
B12GroundGND
SHELLShield / Shell GroundShield / GND
Notes
  • If you want the schematic symbol to be compact, make one sub-symbol called Power containing VBUS, GND, and SHELL, and another called USB-C Signals containing USB2, CC, SBU, and Dummy/NC contacts.
  • If you want strict functional separation, keep Shield / Shell Ground as its own group because it is a mechanical/shield connection, even though the drawing identifies it as GND.
  • No contact is intentionally listed in more than one group above.

    Recommended Functional Groups

    Per-Contact Assignment Checklist

    Notes

Documents

    USB4520-03-0-A Pin Functional Groups

Assets

USB4520-03-0-A_REVA

USB4520-03-0-A_REVA

USB4520-03-0-A_REVA Symbol.svgDefault
step

USB4520-03-0-A_REVA.step

3D_USB4520-03-0-A_REVA3D Model
image-removebg-preview.png

image-removebg-preview.png

image-removebg-previewThumbnail
kicad_mod

GCT_USB4520-03-0-A_REVA.kicad_mod

FP_GCT_USB4520-03-0-A_REVAFootprint
kicad_mod

USB4520030A.kicad_mod

FP_USB4520030A

USB4520-03-0-A

USB4520-03-0-A thumbnail
USB-C (USB TYPE-C) USB 2.0 Receptacle Connector 24 (16+8 Dummy) Position Board Edge, Cutout; Surface Mount; Through Hole, Right Angle
The USB4520-03-0-A from Global Connector Technology (GCT) is a mid-mount USB Type-C connector that supports USB 2.0 signaling. It is engineered for space-saving PCB layouts, combining both surface-mount and through-hole (hybrid) mounting for improved mechanical strength and reliability.
It features a right-angle, board-edge design, making it suitable for devices where the USB-C port needs to be accessible from the edge of the enclosure.
Electrical & Interface USB Type-C receptacle (female) Supports USB 2.0 data transfer 24 total positions (16 active + 8 dummy pins) for mechanical compatibility Reversible plug orientation (standard USB-C feature)
Mechanical Design Mid-mount (mid-plane) design → partially recessed into PCB for lower profile Right-angle orientation for edge-mounted applications Hybrid mounting: Surface-mount signal pins Through-hole shell tabs for mechanical reinforcement Designed for board-edge cutout integration
Form Factor & Durability Compact footprint for space-constrained designs Robust retention due to through-hole anchor tabs Typically rated for thousands of mating cycles (standard for USB-C connectors)
Application Use Cases Embedded systems (e.g., ESP32-based boards) Consumer electronics (chargers, hubs, IoT devices) Industrial control interfaces Portable devices requiring USB-C power/data
Design Notes (Important for PCB Layout) Requires PCB cutout for mid-mount placement Pay attention to: Keepout zones under the connector Differential pair routing (D+ / D−) for USB 2.0 Ensure proper mechanical anchoring to avoid stress on SMT pads
#commonpartslibrary #connector #usb #typec

Properties

Connector

GCT

USB4520-03-0-A

gct.co/files/specs/usb4520-spec.pdf

J

creativecommons.org/licenses/by/4.0/

parametric-v1

Pricing & Availability

Distributor

Qty 1

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