Specifications

www.digikey.com/maxim-industrial 33
Programmable logic controllers (PLCs)
Digital I/O functions
Benefits
• Intelligent features lower BOM cost
– A scalable architecture based on only
one host controller eases software
development and reduces cost
– Handles most low-level transceiver
control autonomously, reducing the
need for powerful and expensive
controllers
– Reduces isolation needs, which
eliminates the need for expensive
isolation components
– Small 48-pin, 7mm x 7mm TQFN
package enables small, high-port-
count systems
• Advanced clocking scheme simplifies
baud-rate generation
– Internal oscillator reduces need for
external crystal and lowers cost
– Integrated PLL, divider, and fractional
baud-rate generator allow considerable
flexibility in baud-rate programming
and independence of reference clock,
thus simplifying clock design
– Four timers produce programmable
clock outputs, which mitigate the need
for and cost of LED blinking
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 I
2
C/SPI host
interface is optimized for industrial systems that require galvanic
isolation. Many advanced UART and transceiver control features
remove timing-critical tasks from the host controller.
Simplest, most economical solution for high-port-count IO-Link systems
PHY
QUAD UART
ISOLATION
CONTROLLER
ADDR 1
PORT 1
PHY
ADDR 2
PORT 2
PHY
ADDR 3
PORT 3
PHY
ADDR 4
PORT 4
MISO
MOSI
SCLK
CS1
CS2
RST
Tx0
Rx0
RTS0
Tx1
Rx1
RTS1
Tx2
Rx2
RTS2
Tx3
Rx3
RTS3
Rx
TxC
TxEn
Rx
TxC
TxEn
Rx
TxC
TxEn
Rx
TxC
TxEn
MAX14830
MAX14824*
MAX14824*
MAX14824*
MAX14824*
Block diagram of the MAX14830 quad UART.
* Future product—contact factory for availability.