MxL81434
Overview
| Information | Hi-Speed USB Bridge with 4 UARTs |
|---|---|
| Data Bus Interface | USB 2.0 |
| # of Channels | 4 |
| Max Data Rate 5V (Mbps) | 12 |
| Max Data Rate 3.3V (Mbps) | 12 |
| Tx FIFO (Bytes) | 512 |
| Rx FIFO (Bytes) | 512 |
| Auto RS-485 | ✔ |
| Auto Flow Control | ✔ |
| Auto Half-Duplex Control | ✔ |
| Multidrop (9-bit) Mode | ✔ |
| Fractional Baud Rate Generator | ✔ |
| Power Down Mode | ✔ |
| 5V Tolerant Inputs | ✔ |
| IrDA Sup | ✔ |
| Supply Voltage Range VCC (V) | 4.4 to 5.25 |
| Max UART/GPIO Input Voltage (V) | 5.5 |
| Max UART/GPIO Output Voltage (V) | 1.8-3.6 |
| Temperature Range (°C) | -40 to 85 |
| Package | QFN-56 |
| X-Y Dimension (mm) | 8x8 |
The MxL81434 is a hi-speed USB 2.0 compound device with an embedded hub and six downstream USB functions: four UARTs, a multi-master-capable I2C controller, and an enhanced dedicated GPIO entity (EDGE) controller.
The upstream USB interface has an integrated USB 2.0 PHY and device controller that is compliant with both hi-speed (480Mbps) and full-speed (12Mbps) USB 2.0. The Vendor ID, Product ID, power mode, remote wake-up support, and maximum power consumption are amongst the values that can be programmed using the on-chip one-time programmable (OTP) memory.
The enhanced UARTs have a maximum data rate of 15Mbps. Using a fractional baud rate generator, any baud rate between 300bps and 15Mbps can be accurately generated. In addition, the UARTs have a large 1024-byte Tx FIFO and Rx FIFO to optimize the overall data throughput for various applications. The automatic RS-485 control feature simplifies both the hardware and software for half-duplex RS-485 applications. If required, the multidrop (9-bit) mode feature further simplifies typical multidrop applications by enabling/disabling the UART receiver depending on the address byte received.
The multi-master-capable I2C controller and EDGE controller (up to 32 GPIOs) can be accessed via the USB HID interface. The EDGE pins or I2C interface can be used for controlling and monitoring other peripherals. Up to two EDGE pins can be configured as PWM generators.
Hi-Speed (480Mbps) and Full-Speed (12Mbps) USB
2.0-compliant interface
Enhanced UART
I2C multi-master
Enhanced Dedicated GPIO Entity (EDGE)
Single 5.0V power supply input
Regulated 3.3V output power
Single 25MHz crystal
±15kV HBM ESD protection on USB data pins
±8kV HBM ESD protection on all other pins
USB CDC-ACM and HID-compliant
Custom software drivers
Available in 8.0mm × 8.0mm QFN-56 package
UARTs
POS terminals
Test instrumentation
Factory automation and process controls
Industrial applications
Documentation & Design Tools
| Type | Title | Version | Date | File Size |
|---|---|---|---|---|
| Product Brochures | Serial Transceivers & Bridges Brochure | R03 | May 2025 | 3.6 MB |
Parts & Purchasing
| Part Number | Pkg Code | Min Temp | Max Temp | Status | Buy Now |
|---|---|---|---|---|---|
| MXL81434I-AQB-R | QFN-56 8x8 | -40 | 85 | PRE | |
| MXL81434I-AQB-EVK-1 | Board | PRE |
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Packaging
| Pkg Code | Details | Quantities | Dimensions |
|---|---|---|---|
| QFN-56 8x8 |
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