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XR21B1424IV64TR-F

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MaxLinear USB ICs, LQFP-64(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentinterface icsxr21b1424iv64tr-ffactory-2.0.0extractor-text

Changed since verified XR21B1424IV64TR-F

by Ray · last 2 Nov 2026 · 1 record · files changed since
SymbolFootprint3D modelPins

Verification log 1 record

2 Nov 2026RayPublished by the parts factory: tier mfr, 64 pinschanged since
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: XR21B1424IV64TR-F · LQFP-64(10x10) · 64 pins
  • ✓copper: 64 copper pads, none touching another net
  • ✓datasheet: all 64 pin names found in the 66-page datasheet
  • ✓distributor: lcsc C2678066, digikey 1016-XR21B1424IV64TR-FTR-ND, mouser 701-21B1424IV64TRF
  • ✓family: LQFP-64_10x10mm_P0.5mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-m1ojv8mz/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 64 pins = 64 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 64 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files! xr21b1424iv64tr-f.kicad_sym✓ xr21b1424iv64tr-f.kicad_mod✓ xr21b1424iv64tr-f.step
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Ray Publish 0.1.0 ee02588 7d ago

XR21B1424IV64TR-F

MaxLinear · USB ICs · LQFP-64(10x10)

XR21B1424IV64TR-F from MaxLinear, in a LQFP-64(10x10). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 RXA input UART channel A receive data input.
2 GPIOA5/RTSA#/RS485A bidirectional GPIO, UART RTS output (active low) or auto RS-485 half-duplex control; defaults to GPIO input with internal pull-up.
3 GPIOA4/CTSA# bidirectional GPIO or UART CTS input (active low); defaults to GPIO input with internal pull-up.
4 GPIOA3/DTRA# bidirectional GPIO or UART DTR push-pull output (active low); defaults to GPIO input with internal pull-up.
5 GPIOA2/DSRA# bidirectional GPIO or UART DSR input (active low); defaults to GPIO input with internal pull-up.
6 GPIOA1/CDA# bidirectional GPIO or UART carrier-detect input (active low); defaults to GPIO input with internal pull-up.
7 GPIOA0/RIA#/RWKA# bidirectional GPIO, UART ring-indicator input (active low) or remote wakeup input signaled on a falling edge; defaults to GPIO input with internal pull-up.
8 GND power_in Power supply common, ground.
9 USBD+ bidirectional USB differential data positive with USB 2.0 compliant internal pull-up resistor and ±15kV HBM ESD protection.
10 USBD- bidirectional USB differential data negative with ±15kV HBM ESD protection.
11 VIO power_in I/O voltage input to the UART/GPIO pins, must be between 1.8 and 3.6V; may be tied to VCC if VCC_REG is 5V.
12 VCC power_in 3.3V power to the device, or 3.3V output (up to 200 mA including the device) when VCC_REG is 5V; decouple with at least 4.7µF ceramic.
13 VCC_REG power_in 5V or 3.3V power input to the device; in bus-powered mode connect to VBUS and VBUS_SENSE, with 1µF to 10µF decoupling.
14 NC unconnected No connect.
15 NC unconnected No connect.
16 VBUS_SENSE input Must be connected to USB host VBUS to disable the USBD+ pull-up when VBUS is absent; decouple with a 4.7µF tantalum capacitor.
17 RESET# bidirectional Active-low open-drain reset output asserted at power-on or device reset; as input must be asserted at least 15µs to reset, with weak internal pull-up.
18 USB_STAT2 output Open-drain USB status output like USB_STAT1, default active low asserted when the device is suspended; configurable via PIN_CFG_USB_STAT2.
19 GPIOC9/RXTC bidirectional GPIO or UART receive data indicator toggling at ~10Hz while receiving; defaults to GPIO input with internal pull-up.
20 GPIOC8/TXTC bidirectional GPIO or UART transmit data indicator toggling at ~10Hz while transmitting; defaults to GPIO input with internal pull-up.
21 NC unconnected No connect.
22 GPIOC7/RS485C bidirectional GPIO or RS-485 half-duplex enable output; defaults to GPIO input with internal pull-up.
23 GPIOC6/CLKC bidirectional GPIO or clock/pulse output; defaults to GPIO input with internal pull-up.
24 TXC output UART channel C transmit data output.
25 USB_STAT1 output USB status output asserted on USB reset, suspend or when it is not safe to draw the requested current; default active high on suspend, selectable via PIN_CFG_STAT1.
26 RXC input UART channel C receive data input.
27 GPIOC5/RTSC#/RS485C bidirectional GPIO, UART RTS output (active low) or auto RS-485 half-duplex control; defaults to GPIO input with internal pull-up.
28 GPIOC4/CTSC# bidirectional GPIO or UART CTS input (active low); defaults to GPIO input with internal pull-up.
29 GPIOC3/DTRC# bidirectional GPIO or UART DTR push-pull output (active low); defaults to GPIO input with internal pull-up.
30 GPIOC2/DSRC# bidirectional GPIO or UART DSR input (active low); defaults to GPIO input with internal pull-up.
31 GPIOC1/CDC# bidirectional GPIO or UART carrier-detect input (active low); defaults to GPIO input with internal pull-up.
32 TEST# input Test mode pin that must be left open or pulled high to VIO for normal operation.
33 GPIOC0/RIC#/RWKC# bidirectional GPIO, UART ring-indicator input (active low) or remote wakeup input signaled on a falling edge; defaults to GPIO input with internal pull-up.
34 GPIOB9/RXTB bidirectional GPIO or UART receive data indicator toggling at ~10Hz while receiving; defaults to GPIO input with internal pull-up.
35 GPIOB8/TXTB bidirectional GPIO or UART transmit data indicator toggling at ~10Hz while transmitting; defaults to GPIO input with internal pull-up.
36 GPIOB7/RS485B bidirectional GPIO or auto RS-485 half-duplex control; defaults to GPIO input with internal pull-up.
37 GPIOB6/CLKB bidirectional GPIO or clock/pulse output; defaults to GPIO input with internal pull-up.
38 VIO power_in I/O voltage input to the UART/GPIO pins, must be between 1.8 and 3.6V; may be tied to VCC if VCC_REG is 5V.
39 GND power_in Power supply common, ground.
40 TXB output UART channel B transmit data output.
41 RXB input UART channel B receive data input.
42 GPIOB5/RTSB#/RS485B bidirectional GPIO, UART RTS output (active low) or auto RS-485 half-duplex control; defaults to GPIO input with internal pull-up.
43 GPIOB4/CTSB# bidirectional GPIO or UART CTS input (active low); defaults to GPIO input with internal pull-up.
44 GPIOB3/DTRB# bidirectional GPIO or UART DTR push-pull output (active low); defaults to GPIO input with internal pull-up.
45 GPIOB2/DSRB# bidirectional GPIO or UART DSR input (active low); defaults to GPIO input with internal pull-up.
46 GPIOB1/CDB# bidirectional GPIO or UART carrier-detect input (active low); defaults to GPIO input with internal pull-up.
47 GPIOB0/RIB#/RWKB# bidirectional GPIO, UART ring-indicator input (active low) or remote wakeup input signaled on a falling edge; defaults to GPIO input with internal pull-up.
48 GPIOD9/RXTD bidirectional GPIO or UART receive data indicator toggling at ~10Hz while receiving; defaults to GPIO input with internal pull-up.
49 GPIOD8/TXTD bidirectional GPIO or UART transmit data indicator toggling at ~10Hz while transmitting; defaults to GPIO input with internal pull-up.
50 GPIOD7/RS485D bidirectional GPIO or RS-485 half-duplex enable output; defaults to GPIO input with internal pull-up.
51 GPIOD6/CLKD bidirectional GPIO or clock/pulse output; defaults to GPIO input with internal pull-up.
52 TXD output UART channel D transmit data output.
53 RXD input UART channel D receive data input.
54 GPIOD5/RTSD#/RS485D bidirectional GPIO, UART RTS output (active low) or auto RS-485 half-duplex control; defaults to GPIO input with internal pull-up.
55 GPIOD4/CTSD# bidirectional GPIO or UART CTS input (active low); defaults to GPIO input with internal pull-up.
56 GPIOD3/DTRD# bidirectional GPIO or UART DTR push-pull output (active low); defaults to GPIO input with internal pull-up.
57 GPIOD2/DSRD# bidirectional GPIO or UART DSR input (active low); defaults to GPIO input with internal pull-up.
58 GPIOD1/CDD# bidirectional GPIO or UART carrier-detect input (active low); defaults to GPIO input with internal pull-up.
59 GPIOD0/RID#/RWKD# bidirectional GPIO, UART ring-indicator input (active low) or remote wakeup input signaled on a falling edge; defaults to GPIO input with internal pull-up.
60 GPIOA9/RXTA bidirectional GPIO or UART receive data indicator toggling at ~10Hz while receiving; defaults to GPIO input with internal pull-up.
61 GPIOA8/TXTA bidirectional GPIO or UART transmit data indicator toggling at ~10Hz while transmitting; defaults to GPIO input with internal pull-up.
62 GPIOA7/RS485A bidirectional GPIO or auto RS-485 half-duplex control; defaults to GPIO input with internal pull-up.
63 GPIOA6/CLKA bidirectional GPIO or clock/pulse output; defaults to GPIO input with internal pull-up.
64 TXA output UART channel A transmit data output.

Key specifications

Parameter Value
Manufacturer MaxLinear
Package LQFP-64(10x10)
Category Interface ICs
Pins 64

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage (VCC_REG) VCC_REG 5.75 V 2
Supply Voltage (VCC, VIO) VCC, VIO 4 V 2
Input Voltage (VBUS_SENSE) VBUS_SENSE -0.3 5.75 V 2
Input Voltage (All other pins) -0.3 5.6 V 2
Operating Temperature Range TA -40 85 °C 2
Power Supply Current ICC 15 23 mA VCC_REG = +4.4V to +5.25V 2
Lowpower Mode Current ISUSP 0.85 1.25 mA 2
Regulated Output Voltage (VCC pin) VOUT 3 3.3 3.6 V VCC_REG = +4.4V to +5.25V. Maximum output current = 200 mA including the supply current of the XR21B1424. 2
Input Low Voltage (UART/GPIO) VIL -0.3 V 2
Input High Voltage (UART/GPIO) VIH 5.5 V 2
Output Low Voltage (UART/GPIO) VOL 0.3 V IOL = 1mA, VIO = +1.6V 2
Output Low Voltage (UART/GPIO) VOL 0.5 V IOL = 4mA, VIO = +3.6V 2
Output High Voltage (UART/GPIO) VOH 1.3 V IOH = -400uA, VIO = +1.6V 2
Output High Voltage (UART/GPIO) VOH 2.8 V IOH = -1.5mA, VIO = +3.6V 2
Input Low Leakage Current IIL -10 10 µA VIO = +3V to +3.6V, VCC_REG = +4.4V to +5.25V, VINPUT = 0V 2
Input High Leakage Current IIH -10 10 µA VIO = +3V to +3.6V, VCC_REG = +4.4V to +5.25V, VINPUT = +3.3V 2
Input High Leakage Current IIH -120 120 µA VIO = +3V to +3.6V, VCC_REG = +4.4V to +5.25V, VINPUT = +5.5V 2
Input Pin Capacitance CIN 5 pF 2
USB Input Low Voltage VIL -0.3 0.8 V 3
USB Input High Voltage VIH 2 5.5 V 3
USB Output Low Voltage VOL 0 0.3 V External 15kΩ to GND on USBD+ and USBD- pins 3
USB Output High Voltage VOH 2.8 3.6 V External 15kΩ to GND on USBD+ and USBD- pins 3
Driver Output Impedance VDrvZ 28 44 Ω 3

CAD (KiCad official)

  • Symbol: XR21B1424IV64TR-F
  • Footprint: Package_QFP:LQFP-64_10x10mm_P0.5mm
  • 3D model: LQFP-64(10x10) (KiCad packages3D, STEP)
  • 3D model files: xr21b1424iv64tr-f-etched.step / xr21b1424iv64tr-f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); xr21b1424iv64tr-f.step / xr21b1424iv64tr-f.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: MaxLinear datasheet (66 pp, sha256 2264ecd5804c3219, retrieved 2026-11-02, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-opus-5-5 (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).

Datasheet PDF