|3.3V Quad LPC UART with 128-Byte FIFO
|Data Bus Interface
|# of Channels
|Max Data Rate (Mbps)
|Tx/Rx FIFO (Bytes)
|Auto Flow Control
|Auto RS-485 Half-Duplex Control
|Multidrop (9-bit) Mode
|Power Down Mode
|5V Tolerant Inputs
|Supply Voltage Range VCC (V)
|3 to 3.6
|Max UART/GPIO Input Voltage (V)
|Max UART/GPIO Output Voltage (V)
|Temperature Range (°C)
|-40 to 85
The XR28V384 (V384) is a quad Universal Asynchronous Receiver and Transmitter (UART) for the Intel Low Pin Count (LPC) bus interface. This device can replace or supplement a Super I/O device to add additional serial ports to the system.
The V384 UARTs support any 16-bit I/O address supported by the system. The register set is based on the industry standard 16550 UART, so the V384 operates with standard serial port drivers without requiring a custom driver to be installed.
The 128 byte Transmit and Receive FIFOs reduce CPU overhead and minimize the chance of buffer overflow and data loss. In addition to the 16550 UART registers, there are also Configuration register set where enhanced features such as the 9-bit (multidrop) mode, IrDA mode and the Watchdog Timer can be enabled.
The V384 is available in a 48-pin TQFP package.
- 128 Byte Transmit and Receive FIFO
- Compliant to LPC 1.1 Specifications
- -40°C to +85°C Industrial Temp Operation
- Watchdog Timer with WDTOUT# signal
- 4 independent UART channels
- Programmable I/O mapped base addresses
- Data rates up to 3 Mbps
- Selectable RX FIFO interrupt trigger levels
- Auto RS-485 Half-Duplex Control mode
- Programmable character lengths (5, 6, 7, 8) with even, odd, or no parity
- IrDA mode and separate IRTXA# and IRRXA# pins for the first UART channel
- 9-bit (Multidrop) mode
- External 24MHz/48MHz clock
- Single 3.3V Supply Voltage ( ± 10%)
- 5V tolerant inputs
- 48-TQFP package (7mm x 7mm)
- Industrial and Embedded PCs
- Factory Automation and Process Controls
- Network Routers
- System Board Designs
Documentation & Design Tools
|XR28V384 3.3V Quad LPC UART with 128-Byte FIFO
|DAN-190, MaxLinear UARTs in RS-485 Applications
|User Guides & Manuals
|XR28V384/XR28V382 Evaluation Board User's Manual
|Schematics & Design Files
|XR28V384-0A Evaluation Board Files: BRD, BOM, Schematic, Manual
Quality & RoHS
|RoHS | Exempt
|MSL Rating / Peak Reflow
|L3 / 260ᵒC
|L3 / 260ᵒC
Click on the links above to download the Certificate of Non-Use of Hazardous Substances.
Parts & Purchasing
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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.
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MxL UARTs Auto RS-485 Direction Control
This video describes how the automatic RS-485 half-duplex direction control feature in MaxLinear UARTs reduces driver development and frees up CPU/MCU loading. This feature eliminates the need to monitor the status of the UART’s transmit shift register and automatically switches MaxLinear RS-485 transceivers from the transmit mode to the receive mode. This video summarizes the content in application note DAN-190.