component
XR21B1411IL16TR-F
Public Made by Adomby adom
MaxLinear USB Converters, QFN-16-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownXR21B1411IL16TR-F
MaxLinear · USB Converters · QFN-16-EP(3x3)
XR21B1411IL16TR-F from MaxLinear, in a QFN-16-EP(3x3). 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 | LOWPOWER | output | Asserted when unsafe to draw current from VBUS per Configuration Descriptor; default active low polarity (programmable via OTP). |
| 2 | NC | unconnected | No connection. |
| 3 | GPIO5/RTS#/RS485 | bidirectional | Configurable GPIO or UART RTS# output (active low) or auto RS-485 half-duplex control with programmable internal pull-up/pull-down. |
| 4 | GPIO4/CTS# | bidirectional | Configurable GPIO or UART CTS# input (active low) for hardware flow control with programmable internal pull-up/pull-down. |
| 5 | GPIO3/DTR# | bidirectional | Configurable GPIO or UART DTR# output (active low) for hardware flow control with programmable internal pull-up/pull-down. |
| 6 | GPIO2/DSR# | bidirectional | Configurable GPIO or UART DSR# input (active low) for hardware flow control with programmable internal pull-up/pull-down. |
| 7 | GPIO1/CD# | bidirectional | Configurable GPIO or UART CD# input (active low) with programmable internal pull-up/pull-down. |
| 8 | GPIO0/RI#/RWK# | bidirectional | Configurable GPIO or UART RI# input (active low) or Remote Wakeup input with programmable internal pull-up/pull-down. |
| 9 | TX | output | UART Transmit Data output. |
| 10 | RX | input | UART Receive Data input with programmable internal pull-up/pull-down resistor; pull-up disabled without valid VIO_REF voltage. |
| 11 | VBUS_SENSE | input | VBUS Sense input to disable USBD+ pull-up in self-powered mode; should be tied to defined state in bus-powered mode. |
| 12 | VIO_REF | power_in | Reference voltage for I/O signal levels with operating range +1.6V to +3.6V. |
| 13 | GND | power_in | Power supply common (ground). |
| 14 | USBD- | bidirectional | USB differential data negative input with ±15 kV HBM ESD protection per USB 2.0 specification. |
| 15 | USBD+ | bidirectional | USB differential data positive input with internal pull-up resistor and ±15 kV HBM ESD protection per USB 2.0 specification. |
| 16 | VCC | power_in | 5V power supply with input voltage range +4.4V to +5.25V. |
| 17 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MaxLinear |
| Package | QFN-16-EP(3x3) |
| Category | Interface |
| Pins | 17 |
CAD (KiCad official)
- Symbol:
XR21B1411IL16TR-F - Footprint:
Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm - 3D model: QFN-16-EP(3x3) (KiCad packages3D, STEP)
- 3D model files:
xr21b1411il16tr-f-etched.step/xr21b1411il16tr-f-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);xr21b1411il16tr-f.step/xr21b1411il16tr-f.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MaxLinear datasheet (31 pp, sha256
2348f9f0dde10db6, retrieved 2026-09-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).