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reference designXR21B1421 | Demoboard XR21B1421_24 Evaluation Board

MaxLinear XR21B1421 | Demoboard XR21B1421_24 Evaluation Board

Enhanced 1-Ch Full-Speed USB HID to UART Bridge

Overview

TopologyOther Topology
IC revision1

Description

The XR21B1421 is an enhanced Universal Asynchronous Receiver and Transmitter (UART) bridge to HID class USB interface. The USB interface is fully compliant to the USB 2.0 (Full-Speed) specification with 12 Mbps USB data transfer rate. The USB interface also supports USB suspend, resume and remote wakeup operations. The USB Vendor ID, Product ID, power mode, remote wakeup support, maximum power, and numerous other settings may be programmed in the no-chip OTP memory via the USB interface using either HID reports or Exar-supplied OTP programming tools.The XR21B1421 includes an internal oscillator and does not require an external crystal/oscillator. Any UART baud rate up to 12 Mbps may be generated with this internal clock and the fractional baud rate generator. The UART pins for each port may also be configured as GPIO; direction, state, output driver type and input pull-up or pull-down resistors are programmed either through on chip OTP, or on the fly via memory mapped registers.

Features

±15kV ESD on USBD+/USBD-USB 2.0 Compliant, Full-Speed (12Mbps)Unique pre-programmed USB serial numberInternally generated 48MHz core clockEnhanced UART featuresBaud rates up to 12 MbpsFractional Baud Rate Generator512-byte TX and 512-byte RX FIFOsAuto Hardware / Software Flow ControlMultidrop and Half-Duplex ModesAuto RS-485 Half-Duplex ControlSelectable GPIO or Modem I/OUp to 10 GPIOs per channel5V tolerant GPIO inputsSuspend state GPIO configurationConfigurable clock output24-pin or 28-pin QFN packageIndustrial -40°C to +85°C Temperature Range

Typical applications

  • Blood Glucose Meters / Health and Fitness Wellness Monitors /
  • Portable Medical Diagnostics
  • Uninterruptible Power Supplies / Energy Management Consoles

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
λDom typ.(nm)
Emitting Color
λPeak typ.(nm)
IV typ.(mcd)
VF typ.(V)
Chip Technology
2θ50% typ.(°)
C
Tol. C
VR(V (DC))
Size
Operating Temperature
DF(%)
RISO
Ceramic Type
L(mm)
W(mm)
H(mm)
Fl(mm)
Packaging
Interface Type
Type
Variant
Gender
Pins
Mount
IR(A)
Working Voltage(V (AC))
SamplesAvailability & Sample
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150060RS75000
SPECWL-SMCW SMT Mono-color Chip LED Waterclear, 625 nm, Red
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear
Dominant Wavelength [typ.]625 nm
Emitting ColorRed 
Peak Wavelength [typ.]630 nm
Luminous Intensity [typ.]250 mcd
Forward Voltage [typ.]2 V
Chip TechnologyAlInGaP 
Viewing Angle Phi 0° [typ.]140 °
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Size0603 
Operating Temperature -40 °C up to +85 °C
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Length1.6 mm
Width0.8 mm
Height0.7 mm
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PackagingTape and Reel 
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MountSMT 
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885012205037
SPECWCAP-CSGP MLCCs 16 V(DC), –, –
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ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 16 V(DC)
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Capacitance100 nF
Capacitance±10% 
Rated Voltage16 V (DC)
Size0402 
Operating Temperature -55 °C up to +125 °C
Dissipation Factor5 %
Insulation Resistance5 GΩ
Ceramic TypeX7R Class II 
Length1 mm
Width0.5 mm
Height0.5 mm
Pad Dimension0.25 mm
Packaging7" Tape & Reel 
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885012106012
SPECWCAP-CSGP MLCCs 10 V(DC), –, –
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ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 10 V(DC)
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Capacitance4.7 µF
Capacitance±20% 
Rated Voltage10 V (DC)
Size0603 
Operating Temperature -55 °C up to +85 °C
Dissipation Factor10 %
Insulation Resistance0.02 GΩ
Ceramic TypeX5R Class II 
Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.4 mm
Packaging7" Tape & Reel 
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885012207051
SPECWCAP-CSGP MLCCs 16 V(DC), –, –
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Downloads8 files

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ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 16 V(DC)
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Capacitance1 µF
Capacitance±10% 
Rated Voltage16 V (DC)
Size0805 
Operating Temperature -55 °C up to +125 °C
Dissipation Factor5 %
Insulation Resistance0.5 GΩ
Ceramic TypeX7R Class II 
Length2 mm
Width1.25 mm
Height1.25 mm
Pad Dimension0.5 mm
Packaging7" Tape & Reel 
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885012107014
SPECWCAP-CSGP MLCCs 16 V(DC), –, –
Simu­lation
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Downloads9 files

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ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 16 V(DC)
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Capacitance10 µF
Capacitance±20% 
Rated Voltage16 V (DC)
Size0805 
Operating Temperature -55 °C up to +85 °C
Dissipation Factor10 %
Insulation Resistance0.01 GΩ
Ceramic TypeX5R Class II 
Length2 mm
Width1.25 mm
Height1.25 mm
Pad Dimension0.5 mm
Packaging7" Tape & Reel 
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61300811121
SPECWR-PHD Pin Header - Single, –, –
Simu­lation–
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Downloads7 files

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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header - Single
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Operating Temperature -40 °C up to +105 °C
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Insulation Resistance1000 MΩ
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Length20.32 mm
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PackagingBag 
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TypeStraight 
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GenderPin Header 
Pins8 
MountTHT 
Rated Current3 A
Working Voltage250 V (AC)
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61300211121
SPECWR-PHD Pin Header - Single, –, –
Simu­lation–
Availability
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Downloads7 files

EDA models: Components ZIP

CAD files ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header - Single
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Operating Temperature -40 °C up to +105 °C
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Insulation Resistance1000 MΩ
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Length5.08 mm
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PackagingBag 
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TypeStraight 
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GenderPin Header 
Pins2 
MountTHT 
Rated Current3 A
Working Voltage250 V (AC)
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61300311121
SPECWR-PHD Pin Header - Single, –, –
Simu­lation–
Availability
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Downloads7 files

EDA models: Components ZIP

CAD files ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header - Single
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Operating Temperature -40 °C up to +105 °C
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Insulation Resistance1000 MΩ
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Length7.62 mm
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PackagingBag 
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TypeStraight 
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GenderPin Header 
Pins3 
MountTHT 
Rated Current3 A
Working Voltage250 V (AC)
–Check availability
61300411121
SPECWR-PHD Pin Header - Single, –, –
Simu­lation–
Availability
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Downloads7 files

EDA models: Components ZIP

CAD files ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header - Single
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Operating Temperature -40 °C up to +105 °C
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Insulation Resistance1000 MΩ
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Length10.16 mm
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PackagingBag 
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TypeStraight 
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GenderPin Header 
Pins4 
MountTHT 
Rated Current3 A
Working Voltage250 V (AC)
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61300821121
SPECWR-PHD Pin Header - Dual, –, –

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

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Downloads7 files

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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header - Dual
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Operating Temperature -40 °C up to +105 °C
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Insulation Resistance1000 MΩ
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Length10.16 mm
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PackagingBag 
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TypeStraight 
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GenderPin Header 
Pins8 
MountTHT 
Rated Current3 A
Working Voltage250 V (AC)
–Check availability
61301011121
SPECWR-PHD Pin Header - Single, –, –
Simu­lation–
Availability
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Downloads7 files

EDA models: Components ZIP

CAD files ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header - Single
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Operating Temperature -40 °C up to +105 °C
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Insulation Resistance1000 MΩ
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Length25.4 mm
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PackagingBag 
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TypeStraight 
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GenderPin Header 
Pins10 
MountTHT 
Rated Current3 A
Working Voltage250 V (AC)
–Check availability
61301021121
SPECWR-PHD Pin Header - Dual, –, –
Simu­lation–
Availability
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Downloads7 files

EDA models: Components ZIP

CAD files ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header - Dual
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Operating Temperature -40 °C up to +105 °C
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Insulation Resistance1000 MΩ
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Length12.7 mm
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PackagingBag 
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TypeStraight 
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GenderPin Header 
Pins10 
MountTHT 
Rated Current3 A
Working Voltage250 V (AC)
–Check availability
61400416121
SPECWR-USB Standard Connectors, –, –
Simu­lation–
Availability
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Downloads7 files

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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-USB Standard Connectors
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Operating Temperature -40 °C up to +105 °C
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Insulation Resistance1000 MΩ
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PackagingTray 
Interface TypeType B 
TypeHorizontal 
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GenderReceptacle 
Pins4 
MountTHT 
Rated Current1.5 A
Working Voltage30 V (AC)
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618009211721
SPECWR-DSUB PCB, –, –
Simu­lation–
Availability
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Downloads7 files

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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-DSUB PCB
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Operating Temperature -55 °C up to +105 °C
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Insulation Resistance5000 MΩ
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Length30.8 mm
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PackagingTray 
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TypeAngled 
Variantwithout Hex Screw 
GenderMale 
Pins9 
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Rated Current3 A
Working Voltage125 V (AC)
–Check availability