USB2532 HUB-C

{
  "schema_version": 1,
  "type": "component",
  "slug": "usb2532-hub-c",
  "title": "USB2532 HUB-C",
  "brief": "USB 2.0 hub molecule based on Microchip USB2532I — 38×38 mm, 1 upstream + 2 downstream USB-C ports, self-powered with on-board 3.3V LDO, I2C EEPROM config, ESD protection, 30 machine contacts + 4 mach",
  "version": "1.0.0",
  "tags": [],
  "license": "MIT",
  "discovery_triggers": [
    "usb2532",
    "usb hub molecule",
    "usb-c hub",
    "usb 2.0 hub",
    "hub-c",
    "usb distribution",
    "usb2532i",
    "microchip usb hub",
    "2-port usb hub",
    "workcell usb"
  ],
  "discovery_pitch": "USB2532 HUB-C molecule — Microchip USB2532I 2-port USB 2.0 hub with 3× USB-C ports, self-powered, I2C EEPROM config, ESD protection, 30 machine contacts. Workcell USB distribution.",
  "sample_prompts": [
    {
      "label": "USB hub",
      "prompt": "Find the USB 2.0 hub molecule"
    },
    {
      "label": "USB2532",
      "prompt": "Show me the USB2532 hub molecule pinout"
    },
    {
      "label": "USB distribution",
      "prompt": "I need a USB hub for workcell USB distribution"
    },
    {
      "label": "EEPROM config",
      "prompt": "How do I configure the USB2532 hub EEPROM?"
    }
  ],
  "component": {
    "mpn": "USB2532 HUB-C",
    "manufacturer": "",
    "package": "",
    "pin_count": null,
    "category": "molecule",
    "subcategory": "",
    "body_size": null,
    "parts": {},
    "distributor_links": {}
  },
  "readme": "# USB2532 HUB-C\n\nUSB 2.0 hub molecule based on the Microchip USB2532I — 38×38 mm, 1 upstream + 2 downstream USB-C ports, self-powered with on-board 3.3V LDO, I2C EEPROM for configuration, and 30 machine contacts + 4 machine pins. Designed for Adom workcell USB distribution.\n\n## How It Works\n\nThe three USB-C 2.0 connectors are the primary user-facing interface for this molecule. J1 (upstream) connects to the USB host; J2 and J3 (downstream) connect to USB devices. The downstream ports provide power delivery to connected devices via per-port power switches (AP22615) with overcurrent protection.\n\n**All input power comes through the machine contacts only** — the hub does not draw power from the upstream USB host. The workcell +5V rail feeds in through MP1/MP2 and MC20–MC22, powering the hub IC, the 3.3V LDO, and the downstream port power switches. This self-powered topology means downstream devices get full 5V power from the workcell supply regardless of what the USB host can source.\n\n## Overview\n\n| Property | Value |\n|---|---|\n| **Molecule ID** | `usb2532-hub-c` |\n| **Board Size** | 38.0 × 38.0 mm |\n| **Hub IC** | USB2532I-1080AEN (Microchip, QFN-36) — USB 2.0, 2-port hub |\n| **EEPROM** | 24LC04BT-I/OT — 4 Kbit I2C, stores hub configuration |\n| **Regulator** | MCP1725T-ADJE/MC — adjustable LDO, set for 3.3V |\n| **Power Switches** | 2× AP22615AWU — per-port power control with overcurrent protection |\n| **ESD Protection** | 3× TPD2EUSB30DRTR — one per USB-C port |\n| **USB Ports** | J1 (upstream UFP), J2 (downstream port 1), J3 (downstream port 2) |\n| **Crystal** | 24 MHz |\n| **Machine Contacts** | 30 contacts + 4 corner machine pins |\n| **KiCad Version** | 7/8 |\n| **Design Reference** | SMSC EVB-USB2534BC-01 evaluation board |\n\n## Key ICs\n\n| Ref | Part | Package | Function |\n|---|---|---|---|\n| U4 | USB2532I-1080AEN | QFN-36 | USB 2.0 hub controller, 2 downstream ports |\n| U7 | 24LC04BT-I/OT | SOT-23-5 | 4 Kbit I2C EEPROM for hub configuration |\n| U5 | MCP1725T-ADJE/MC | DFN-8 | Adjustable LDO regulator (3.3V output) |\n| U1 | AP22615AWU | SOT-23-5 | Port 1 power switch with OCS |\n| U3 | AP22615AWU | SOT-23-5 | Port 2 power switch with OCS |\n| U6 | TPD2EUSB30DRTR | DRT-3 | Upstream USB ESD protection |\n| U8 | TPD2EUSB30DRTR | DRT-3 | Downstream port 1 ESD protection |\n| U9 | TPD2EUSB30DRTR | DRT-3 | Downstream port 2 ESD protection |\n\n## Machine Contact Pin Mapping\n\n4 corner machine pins + 30 machine contacts on all 4 edges.\n\n### Corner Machine Pins\n\n| Pin | Position | Net | Function |\n|---|---|---|---|\n| MP1 | Top-left (16, 24) | +5V | 5V power input |\n| MP2 | Top-right (48, 24) | +5V | 5V power input |\n| MP3 | Bottom-left (16, 56) | GND | Ground |\n| MP4 | Bottom-right (48, 56) | GND | Ground |\n\n### Left Edge — Control & Config\n\n| Contact | Net | Function |\n|---|---|---|\n| MC19 | GND | Ground |\n| MC17 | /RX | UART RX (hub debug) |\n| MC18 | /TX | UART TX (hub debug) |\n| MC16 | +3V3 | 3.3V output |\n| MC1 | /SCL/CFG_SEL0 | I2C clock / config strap 0 |\n| MC2 | /SDA/SMBDATA | I2C data / SMBus data |\n| MC3 | /RESET | Hub reset |\n| MC5 | GND | Ground |\n| MC4 | /VBUS_DET | Upstream VBUS detect |\n\n### Top Edge — Power\n\n| Contact | Net | Function |\n|---|---|---|\n| MC20 | +5V | 5V power |\n| MC21 | +5V | 5V power |\n| MC22 | +5V | 5V power |\n| MC23 | GND | Ground |\n| MC24 | GND | Ground |\n| MC25 | GND | Ground |\n\n### Right Edge — USB Data & Downstream\n\n| Contact | Net | Function |\n|---|---|---|\n| MC27 | /CC2_2 | Port 2 CC2 |\n| MC28 | /USB2_DP | Port 2 USB D+ |\n| MC29 | /USB2_DN | Port 2 USB D- |\n| MC30 | GND | Ground |\n| MC26 | /PWR2 | Port 2 power enable |\n| MC7 | /CC2_1 | Port 1 CC2 |\n| MC8 | /USB1_DP | Port 1 USB D+ |\n| MC9 | /USB1_DN | Port 1 USB D- |\n| MC10 | GND | Ground |\n| MC6 | /PWR1 | Port 1 power enable |\n\n### Bottom Edge — Upstream USB\n\n| Contact | Net | Function |\n|---|---|---|\n| MC11 | /VBUS_UP | Upstream VBUS |\n| MC12 | /CC2_0 | Upstream CC2 |\n| MC13 | /USB_UP_DP | Upstream USB D+ |\n| MC14 | /USB_UP_DN | Upstream USB D- |\n| MC15 | GND | Ground |\n\n## Configuration Modes\n\nThe hub supports two configuration modes selected via solder jumpers:\n\n| Mode | CFG_SEL1 (JP5) | CFG_SEL0 (JP4) | Use |\n|---|---|---|---|\n| **Straps & OTP, Self Pwr** | 0 (open) | 0 (open) | Initial bring-up, blank EEPROM |\n| **I2C EEPROM & OTP** | 1 (bridged) | 1 (bridged) | After EEPROM is programmed |\n\nJP3 bridges SDA to +3V3 (I2C pull-up).\n\n## Power Architecture\n\n```\n+5V input (MC20-22 or MP1/MP2)\n  │\n  ├─→ FB1 (ferrite bead) → VBUS upstream (J1)\n  ├─→ U1 (AP22615) → Port 1 power (J2)\n  ├─→ U3 (AP22615) → Port 2 power (J3)\n  └─→ U5 (MCP1725) → +3V3 (hub logic, EEPROM)\n```\n\nSelf-powered topology — the hub provides power to downstream ports from the workcell +5V rail, not from the upstream USB host.\n\n## Status LEDs\n\n| LED | Color | Function |\n|---|---|---|\n| D1 | Green | 3.3V power good |\n| D2 | Red | Reset indicator |\n| D3 | Yellow | Hub activity |\n| D4 | Green | Port 1 power good |\n| D5 | Red | Overcurrent fault |\n| D6 | Green | Port 2 power good |\n\n## Solder Jumpers\n\n| Jumper | Default | Function |\n|---|---|---|\n| JP1 | Bridged | Port 1 power enable routing |\n| JP2 | Bridged | Port 2 power enable routing |\n| JP3 | Bridged | SDA I2C pull-up |\n| JP4 | Bridged | CFG_SEL0 (config mode select) |\n| JP5 | Bridged | CFG_SEL1 (config mode select) |\n\n## EEPROM & Firmware\n\nThe project includes firmware tools for EEPROM programming:\n\n- `firmware/eeprom.bin` — pre-built EEPROM binary\n- `firmware/usb2532_eeprom.py` — Python programming script\n- `test/EEPROM_PROGRAMMING_GUIDE.md` — programming instructions\n- `test/USB2532_Config_v1.2.json` — hub configuration\n- `test/USB2532_HUB-C_Test_Procedure.md` — full functional test procedure\n\n## Debug & Test Points\n\n| Test Point | Signal | Function |\n|---|---|---|\n| TP1 | — | General probe point |\n| TP2 | — | General probe point |\n| TP3 | — | General probe point |\n| SW1 | RESET | Manual hub reset button |\n\n## Fabrication\n\nKiCad project files included. STEP model available for mechanical integration.\n\n## 3D Models\n\n- `USB2532_HUB-C.glb` — assembled board GLB\n- `USB2532_HUB-C.step` — STEP model for mechanical CAD\n",
  "author": {
    "name": "Kyle Bergstedt",
    "email": "[email protected]"
  },
  "visibility": {
    "public": true
  },
  "hero": null,
  "metadata": {},
  "created_at": "2026-05-28T05:30:47.393Z",
  "updated_at": "2026-05-28T05:30:47.393Z",
  "org": "adom"
}