Specifications

23PLCs: Featured Products
Simplest, Most Economical Solution for
High-Port-Count IO-Link Systems
MAX14830
The MAX14830 is an advanced quad, serial UART with 128-word FIFOs for high-port-
count I/O systems like an IO-Link system. By reducing the number of signals that need
be isolated, the serial SPI/I
2
C host interface is optimized for industrial systems that
require galvanic isolation. Many advanced UART and transceiver control features are
integrated in the MAX14830 and remove timing-critical tasks from the host controller.
Benefits
• Handles most low-level transceiver
control autonomously, reducing the
need for powerful and expensive
controllers
◦ Automatic hardware and software
flow control
◦ Automatic transceiver direction
control
◦ Automatic transmitter disable
• Reduces the need for expensive
isolation components, which lowers
cost
◦ Quad UART combines signals
◦ SPI interface has only unidirectional
signals, which eases isolation
• Simplified baud-rate generation
reduces design time and complexity
◦ Integrated PLL, divider, and
fractional baud-rate generator
◦ Advanced clocking scheme
◦ Independent of reference clock
◦ Four timers produce programmable
clock outputs, which mitigate the
need for external clock generators
PORT1
ADDR1
MAX14824
PORT2
ADDR2
RX
TXC
MAX14824
TXEN
PORT3
ADDR3
RX
TXC
MAX14824
TXEN
PORT4
ADDR4
RX
TXC
MAX14824
TXEN
RX
TXC
TXEN
V
EXT
TX0
RX0
RTSO
MOSI
CONTROLLER
MISO
SCLK
RST
CS2
CS1
RST CS SCLK
XIN XOUT
MOSI MISO
TX1
RX1
RTS1
GPIO1
TX2
RX2
RTS2
TX3
RX3
RTS3
GPIO5
GPIO9
GPIO13
MAX14830
ISOLATION
Block diagram of the MAX14830 quad UART.