XR21V1412IL32TR-F

@@ -0,0 +1,73 @@+# XR21V1412IL32TR-F++**MaxLinear** · USB Converters · QFN-32-EP(5x5)++XR21V1412IL32TR-F from MaxLinear, in a QFN-32-EP(5x5). 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 | GND | power_in | Power-supply common (ground). |+| 2 | LOWPOWER | output | Low-power status output. Asserted while it is not safe to draw the current requested in the Configuration Descriptor bMaxPower; sampled at power-up / USB bus reset with an external 10 K pull-up (active-HIGH in suspend) or 3.3 K pull-down (active-LOW in suspend) to set its polarity. |+| 3 | GND | power_in | Power-supply common (ground). |+| 4 | VCC | power_in | +3.3 V power supply. |+| 5 | TXA | output | UART Channel A transmit data output. |+| 6 | RXA | input | UART Channel A receive data input. Internal pull-up is present and is NOT disabled during suspend mode. |+| 7 | GPIOA5/RTSA#/RS485A | bidirectional | Channel A GPIO, active-low Request-To-Send output, or automatic RS-485 half-duplex control. Internal pull-up disabled during suspend; add an external pull-up when used as an input. |+| 8 | GPIOA4/CTSA# | bidirectional | Channel A GPIO or active-low Clear-To-Send input used with automatic RTS/CTS hardware flow control. Internal pull-up disabled during suspend. |+| 9 | GPIOA3/DTRA# | bidirectional | Channel A GPIO or active-low Data-Terminal-Ready output used with automatic DTR/DSR hardware flow control. Internal pull-up disabled during suspend. |+| 10 | GPIOA2/DSRA# | bidirectional | Channel A GPIO or active-low Data-Set-Ready input used with automatic DTR/DSR hardware flow control. Internal pull-up disabled during suspend. |+| 11 | GPIOA1/CDA# | bidirectional | Channel A GPIO or active-low Carrier-Detect input. Internal pull-up disabled during suspend. |+| 12 | GPIOA0/RIA#/RWKA# | bidirectional | Channel A GPIO, active-low Ring-Indicator input, or Remote Wakeup input (a HIGH-to-LOW transition on this pin during USB suspend signals a remote-wakeup to the host). Internal pull-up disabled during suspend. |+| 13 | VCC | power_in | +3.3 V power supply. |+| 14 | GND | power_in | Power-supply common (ground). |+| 15 | TXB | output | UART Channel B transmit data output. |+| 16 | RXB | input | UART Channel B receive data input. Internal pull-up is present and is NOT disabled during suspend mode. |+| 17 | GPIOB5/RTSB#/RS485B | bidirectional | Channel B GPIO, active-low Request-To-Send output, or automatic RS-485 half-duplex control. Internal pull-up disabled during suspend. |+| 18 | GPIOB4/CTSB# | bidirectional | Channel B GPIO or active-low Clear-To-Send input used with automatic RTS/CTS hardware flow control. Internal pull-up disabled during suspend. |+| 19 | GPIOB3/DTRB# | bidirectional | Channel B GPIO or active-low Data-Terminal-Ready output used with automatic DTR/DSR hardware flow control. Internal pull-up disabled during suspend. |+| 20 | GPIOB2/DSRB# | bidirectional | Channel B GPIO or active-low Data-Set-Ready input used with automatic DTR/DSR hardware flow control. Internal pull-up disabled during suspend. |+| 21 | GPIOB1/CDB# | bidirectional | Channel B GPIO or active-low Carrier-Detect input. Internal pull-up disabled during suspend. |+| 22 | GPIOB0/RIB#/RWKB# | bidirectional | Channel B GPIO, active-low Ring-Indicator input, or Remote Wakeup input for Channel B. Internal pull-up disabled during suspend. |+| 23 | GND | power_in | Power-supply common (ground). |+| 24 | VCC | power_in | +3.3 V power supply. |+| 25 | SDA | bidirectional | I2C-controller open-drain data line for the optional external EEPROM used to override the USB Vendor ID / Device ID and other descriptors. Requires an external 4.7 - 10 kΩ pull-up. When no EEPROM is fitted, SDA is strapped with SCL to select Remote-Wakeup and Power modes (see Table 2). |+| 26 | SCL | bidirectional | I2C-controller open-drain serial clock for the optional external EEPROM. Requires an external 4.7 - 10 kΩ pull-up. When no EEPROM is fitted, SCL is strapped with SDA to select Remote-Wakeup and Power modes (see Table 2). |+| 27 | GND | power_in | Power-supply common (ground). |+| 28 | GND | power_in | Power-supply common (ground). |+| 29 | USBD- | bidirectional | USB port differential data minus. ±5 kV HBM ESD protected. |+| 30 | USBD+ | bidirectional | USB port differential data plus. Contains an internal 1.5 kΩ pull-up so the device enumerates as a full-speed USB device. ±5 kV HBM ESD protected. |+| 31 | VCC | power_in | +3.3 V power supply. |+| 32 | VCC | power_in | +3.3 V power supply. |+| 33 | GND (Thermal Pad) | power_in | Exposed center pad on the back of the QFN package; must be soldered to the PCB GND plane. The datasheet specifies a solder-mask-defined thermal land approximately the same size as the pad, with the solder-mask opening set back at least 0.0025 inch inside the pad edge. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | MaxLinear |+| Package | QFN-32-EP(5x5) |+| Category | Interface |+| Pins | 33 |++## Ordering variants++- `XR21V1412IL32TR-FIL32-F`+- `XR21V1412IL32TR-F`++## CAD (KiCad official)++- Symbol: `XR21V1412IL32TR-F`+- Footprint: `Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm`+- 3D model: QFN-32-EP(5x5) (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [MaxLinear datasheet](docs/xr21v1412il32tr-f-datasheet.pdf) (33 pp, sha256 `2657bc3f2b9ad1ea`, 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/xr21v1412il32tr-f-datasheet.pdf)

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