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MaxLinear XR21B1421 | Demoboard XR21B1421_24 Evaluation Board
Enhanced 1-Ch Full-Speed USB HID to UART Bridge
Overview
| Topology | Other Topology |
| IC revision | 1 |
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
- Uninterruptible Power Supplies / Energy Management Consoles
- Blood Glucose Meters / Health and Fitness Wellness Monitors /
- Portable Medical Diagnostics
More information
Products
| Order Code | Datasheet | Simulation | Downloads | 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 | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | Fl (mm) | Application | Interface Type | IR (A) | Pins | Rows | H (mm) | Gender | Type | IR (A) | Packaging | Mount | Operating Temperature | Working Voltage (V (AC)) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 150060RS75000 | SPEC | 25 files RAY files
| WL-SMCW SMT Mono-color Chip LED Waterclear | 625 | Red | 630 | 250 | 2 | AlInGaP | 140 | – | – | – | 0603 | – | – | – | 1.6 | 0.8 | – | – | – | – | – | – | 0.7 | – | – | – | Tape and Reel | SMT | -40 °C up to +85 °C | – | ||
 | 885012205037 | SPEC | 5 files | WCAP-CSGP MLCCs 16 V(DC) | – | – | – | – | – | – | – | 100 nF | ±10% | 16 | 0402 | 5 | 5 GΩ | X7R Class II | 1 | 0.5 | 0.25 | – | – | – | – | – | 0.5 | – | – | – | 7" Tape & Reel | – | -55 °C up to +125 °C | – | ||
| 885012106012 | SPEC | 8 files | WCAP-CSGP MLCCs 10 V(DC) | – | – | – | – | – | – | – | 4.7 µF | ±20% | 10 | 0603 | 10 | 0.02 GΩ | X5R Class II | 1.6 | 0.8 | 0.4 | – | – | – | – | – | 0.8 | – | – | – | 7" Tape & Reel | – | -55 °C up to +85 °C | – | ||
| 885012207051 | SPEC | 7 files | WCAP-CSGP MLCCs 16 V(DC) | – | – | – | – | – | – | – | 1 µF | ±10% | 16 | 0805 | 5 | 0.5 GΩ | X7R Class II | 2 | 1.25 | 0.5 | – | – | – | – | – | 1.25 | – | – | – | 7" Tape & Reel | – | -55 °C up to +125 °C | – | ||
| 885012107014 | SPEC | 8 files | WCAP-CSGP MLCCs 16 V(DC) | – | – | – | – | – | – | – | 10 µF | ±20% | 16 | 0805 | 10 | 0.01 GΩ | X5R Class II | 2 | 1.25 | 0.5 | – | – | – | – | – | 1.25 | – | – | – | 7" Tape & Reel | – | -55 °C up to +85 °C | – | ||
 | 61300811121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | 20.32 | – | – | – | – | – | 8 | Single | – | Pin Header | Straight | 3 | Bag | THT | -40 °C up to +105 °C | 250 | |
| 61300211121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | 5.08 | – | – | – | – | – | 2 | Single | – | Pin Header | Straight | 3 | Bag | THT | -40 °C up to +105 °C | 250 | |
| 61300311121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | 7.62 | – | – | – | – | – | 3 | Single | – | Pin Header | Straight | 3 | Bag | THT | -40 °C up to +105 °C | 250 | |
| 61300411121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | 10.16 | – | – | – | – | – | 4 | Single | – | Pin Header | Straight | 3 | Bag | THT | -40 °C up to +105 °C | 250 | |
 | 61300821121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Dual Pin Header | – | – | – | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | 10.16 | – | – | – | – | 3 | 8 | Dual | – | Pin Header | Straight | 3 | Bag | THT | -40 °C up to +105 °C | 250 | |
| 61301011121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | 25.4 | – | – | – | – | – | 10 | Single | – | Pin Header | Straight | 3 | Bag | THT | -40 °C up to +105 °C | 250 | |
| 61301021121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Dual Pin Header | – | – | – | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | 12.7 | – | – | – | – | – | 10 | Dual | – | Pin Header | Straight | 3 | Bag | THT | -40 °C up to +105 °C | 250 | |
 | 61400416121 | SPEC | – | 6 files | WR-COM USB 2.0 Horizontal THT | – | – | – | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | – | – | – | USB 2.0 | Type B | – | 4 | – | – | Receptacle | Horizontal | 1.5 | Tray | THT | -40 °C up to +105 °C | 30 | |
 | 618009211721 | SPEC | – | 6 files | WR-DSUB 8.08 mm Male Angled PCB Connector w/o Hex Screw | – | – | – | – | – | – | – | – | – | – | – | – | 5000 MΩ | – | 30.8 | – | – | – | – | 3 | 9 | – | – | Male | Angled | 3 | Tray | – | -55 °C up to +105 °C | 125 |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | 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 | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | Fl (mm) | Application | Interface Type | IR (A) | Pins | Rows | H (mm) | Gender | Type | IR (A) | Packaging | Mount | Operating Temperature | Working Voltage (V (AC)) | Samples |
|---|