CP2105-F01-GMR

@@ -0,0 +1,66 @@+# CP2105-F01-GMR++**SKYWORKS SILICON LABS** · USB Converters · QFN-24-EP(4x4)++CP2105-F01-GMR from SKYWORKS SILICON LABS, in a QFN-24-EP(4x4). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | SUSPEND/RI_SCI | bidirectional | In GPIO mode, active-low (default) USB Suspend status output; polarity configurable via PROM. In modem-control mode, active-low Ring Indicator (RI) input for the Standard Comm Interface (SCI). |+| 2 | GND | power_in | Ground reference. Must be tied to ground. The QFN center pad is also optionally tied to GND. |+| 3 | D+ | bidirectional | USB D+ full-speed (12 Mbps) differential data line. Integrated pull-up; no external series resistor required. |+| 4 | D- | bidirectional | USB D- full-speed (12 Mbps) differential data line. Integrated transceiver; no external series resistor required. |+| 5 | VIO | power_in | I/O supply voltage input, 1.8 V to VDD. Sets the logic-level reference for the UART/GPIO/RST pins. |+| 6 | VDD | power_in | Digital supply voltage input, 3.0 to 3.6 V. Can be driven by the internal regulator output or an external 3.3 V rail. |+| 7 | REGIN | power_in | 5 V input to the on-chip voltage regulator, 3.0 to 5.25 V. Regulator output is 3.45 V typ, up to 100 mA. |+| 8 | VBUS | input | USB VBUS sense input. Connect to the VBUS line of the USB connector; detection threshold 2.5 V. |+| 9 | RST | bidirectional | Device Reset. Open-drain output of the internal POR / VDD monitor; drive low externally for at least 15 us to force a system reset. Active low. |+| 10 | CTS_ECI | input | Enhanced Comm Interface Clear-To-Send hardware flow-control input, active low. May be left unconnected when unused. |+| 11 | RTS_ECI | output | Enhanced Comm Interface Ready-To-Send hardware flow-control output, active low. |+| 12 | RXD_ECI | input | Enhanced Comm Interface asynchronous UART receive data input. Baud rates 300 bps to 2.0 Mbps. |+| 13 | TXD_ECI | output | Enhanced Comm Interface asynchronous UART transmit data output. Baud rates 300 bps to 2.0 Mbps. |+| 14 | GPIO.1_ECI/DSR_ECI | bidirectional | In GPIO mode, a user-configurable I/O for the Enhanced Comm Interface. In modem-control mode, the active-low Data Set Ready (DSR) input for the ECI. |+| 15 | GPIO.0_ECI/DTR_ECI | bidirectional | In GPIO mode, a user-configurable I/O for the Enhanced Comm Interface. In modem-control mode, the active-low Data Terminal Ready (DTR) output for the ECI. |+| 16 | NC/DCD_ECI/VPP | bidirectional | In GPIO mode, unused (NC). In modem-control mode, active-low Data Carrier Detect (DCD) input for the ECI. Additionally serves as VPP for OTP-ROM programming when a 4.7 uF capacitor is connected to GND; during programming VPP = 5.75 V min. |+| 17 | SUSPEND/RI_ECI | bidirectional | In GPIO mode, active-low (default) USB Suspend status output; polarity configurable via PROM. In modem-control mode, active-low Ring Indicator (RI) input for the Enhanced Comm Interface. |+| 18 | CTS_SCI | input | Standard Comm Interface Clear-To-Send hardware flow-control input, active low. |+| 19 | RTS_SCI | output | Standard Comm Interface Ready-To-Send hardware flow-control output, active low. |+| 20 | RXD_SCI | input | Standard Comm Interface asynchronous UART receive data input. Baud rates 2400 bps to 921600 bps. |+| 21 | TXD_SCI | output | Standard Comm Interface asynchronous UART transmit data output. Baud rates 2400 bps to 921600 bps. |+| 22 | GPIO.2_SCI/DSR_SCI | bidirectional | In GPIO mode, a user-configurable I/O for the Standard Comm Interface. In modem-control mode, the active-low Data Set Ready (DSR) input for the SCI. |+| 23 | GPIO.1_SCI/DTR_SCI | bidirectional | In GPIO mode, a user-configurable I/O for the Standard Comm Interface. In modem-control mode, the active-low Data Terminal Ready (DTR) output for the SCI. |+| 24 | GPIO.0_SCI/DCD_SCI | bidirectional | In GPIO mode, a user-configurable I/O for the Standard Comm Interface. In modem-control mode, the active-low Data Carrier Detect (DCD) input for the SCI. |+| 25 | GND_PAD | power_in | Exposed thermal/center pad on the QFN-24 package. Optional connection to GND; recommended for improved thermal performance and grounding. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | SKYWORKS SILICON LABS |+| Package | QFN-24-EP(4x4) |+| Category | Interface |+| Pins | 25 |++## Ordering variants++Same part, different packaging or reel option.++- `CP2105-F01-GMR`++## CAD (KiCad official)++- Symbol: `CP2105-F01-GMR`+- Footprint: `Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm`+- 3D model: QFN-24-EP(4x4) (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [SKYWORKS SILICON LABS datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586182637614739456) (24 pp, sha256 `f46ab66681188a77`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/cp2105-f01-gmr-datasheet.pdf)

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