MAX14830

PRODUCTION

Quad Serial UART with 128-Word FIFOs

Industry's First Quad SPI/I2C UART

Data Sheet (Rev. 7) Product Selection Table
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Overview

  • Bridges an SPI/MICROWIRE or I2C Microprocessor Bus to an Asynchronous Interface like RS-485, RS-232, or IrDASM
    • SIR- and MIR-Compliant IrDA Encoder/Decoder
    • Line Noise Indication Ensures Data Link Integrity
  • Deep, 128-Word Buffer and Automated Control Features Help Offload Activity on the Microcontroller
    • 128-Word Transmit and Receive FIFOs per UART
    • Transmitter Synchronization Through SPI Commands
    • Automatic Hardware Flow Control Using Active-Low RTS_ and Active-Low CTS_ Outputs and Inputs
    • Automatic Software Flow Control (XON/XOFF)
    • Auto Transceiver Direction Control
    • Programmable Setup and Hold Times for Transceiver Control
    • Auto Transmitter Disable
    • Half-Duplex Echo Suppression
    • 9-Bit Multidrop-Mode Data Filtering
      • Special Character Detection
      • GPIO-Based Character Detection
      • Four Timers Routed to GPIOs
      • 16 Flexible GPIOs with 20mA Drive Capability
  • Saves Board Space
    • TQFN (7mm × 7mm) Package
  • Fast Data Rates Allow Maximum System Flexibility Across Interface Standards
    • 6Mbaud (max) Data Rate in 16x Sampling Mode
    • 12/24Mbaud (max) Data Rate in 2x/4x Rate Modes
    • High-Resolution Programmable Baud-Rate
    • SPI Up to 26MHz Clock Rate
    • Fast Mode Plus (Pm+) I2C Up to 1MHz
  • Integrated Internal Oscillator Eliminates the Need for an External Oscillator and Reduces the BOM Cost
    • Fractional Baud-Rate Generators, Predivider, and Phase-Locked Loop (PLL)
    • Logic-Level Translation Down to 1.61V on the Controller and Transceiver Interfaces Ensures System Compatibility
    • Register Compatible with MAX3107, MAX3108, MAX3109

The MAX14830 is an advanced quad universal asynchronous receiver-transmitter (UART), each UART having 128 words of receive and transmit first-in/first-out (FIFO) and a high-speed serial peripheral interface (SPI) or I2C controller interface. A PLL and fractional baud-rate generators allow a high degree of flexibility in baud-rate programming and reference clock selection.

Each of the four UARTs is selected by in-band SPI/I2C addressing. Logic-level translation on the transceiver and controller interfaces allows ease of interfacing to microcontrollers, FPGAs, and transceivers that are powered by differing supply voltages.

Extensive features simplify transceiver control in half-duplex communication applications. The MAX14830 features the ability to synchronize the start of individual UART's transmission by SPI-based triggering. On-board timers allow programming of delays between transmitters as well as clock generation on GPIOs.

The 128-word FIFOs have advanced FIFO control reducing host processor data flow management.

The MAX14830 is available in a 48-pin TQFN (7mm × 7mm) package and is specified to operate over the extended -40°C to +85°C temperature range.

Applications

  • Airplane Communication Buses
  • Industrial Control Systems
  • IO-Link Master Controllers
  • Medical Systems
  • Point-of-Sales Systems
  • Programmable Logic Controllers (PLC)
MAX14830
Quad Serial UART with 128-Word FIFOs
MAX14830: Functional Diagram
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 1

Technical Articles 2

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Software Resources

Device Drivers 2

Tools & Simulations

IBIS Model 1

Evaluation Kits

MAX14830EVKIT

Evaluation Kit for the MAX14830

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Features and Benefits

  • +3.3V and +24V Power-Supply Operation
  • On-Board IO-Link Master Transceivers (MAX14824)
  • On-Board RS-485/RS-232 Multiprotocol Transceivers (MAX3160E)
  • PCB Header for User-Supplied SPI- and I²C-Compatible Signals
  • PCB Headers for UART Signals (J1)
  • Evaluates the MAX14830 in a 48-Pin TQFN (7mm x 7mm) Package
  • RoHS Compliant
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX14830 evaluation kit (EV kit) provides a proven design to evaluate the MAX14830 quad-channel universal asynchronous receiver-transmitter (UART) IC. Each UART contains 128 words of receive and transmit first-in/first-out (FIFO) buffer that can be controlled through the SPI or I²C interface. Each of the four UARTs are selected through SPI or I²C in-band addressing.

Each of the four UARTs can interface with an IO-Link® master transceiver or an RS-485/RS-232 multiprotocol transceiver. The EV kit contains on-board IO-Link master transceivers, RS-485/RS-232 multiprotocol transceivers, and double-pole/double-throw (DPDT) switches are used to select between the IO link and RS-485/RS-232 transceivers.

The EV kit operates from a +3.3V and a +24V DC supply and requires 100mA of current from each supply. This EV kit requires a user-supplied SPI/I²C controller and software.

The EV kit comes with a MAX14830ETM+ installed.

Applications

  • Airplane Communication Buses
  • Automotive Infotainment Systems
  • Industrial Control Systems
  • IO-Link Master Controllers
  • Medical Systems
  • Point-of-Sales Systems
  • Programmable Logic Controllers (PLC)
MAX14830EVKIT
Evaluation Kit for the MAX14830

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