Specifications

32 Maxim Industrial Solutions
Programmable logic controllers (PLCs)
Digital I/O functions
Benefits
• Optimal digital I/O solution lowers cost
for high-port-count IO-Link systems
– SPI in-band addressing reduces
hardware costs
– Digital input enables high-density,
digital-input designs
• High-power drive allows use in digital
outputs
– 300mA drive current drives high-power
valves
• High integration reduces load on
processor
– Automatic wake-up generation allows
use of simple processors
MAX14824*
The MAX14824 is an IO-Link master transceiver designed for high-
channel-count IO-Link port-count applications. The MAX14824
integrates an IO-Link physical interface with an additional digital
input and two regulators. A high-speed 12MHz SPI interface allows
fast programming and monitoring of the IO-Link interface. A slave
transceiver is located on the sensors/actuators.
The MAX14824’s in-band addressing and selectable SPI addresses
enable multiple devices to be cascaded. The device supports the
standard IO-Link data rates and features slew-rate selection to
reduce EMI. The driver is guaranteed to drive up to 300mA (min)
load currents. Internal wake-up circuitry automatically determines
the correct wake-up polarity, thus allowing the use of simple UARTs
for wake-up pulse generation. The MAX14824 is available in a
4mm x 4mm, 24-pin TQFN and operates over the extended
-40°C to +85°C temperature range.
IO-Link master transceiver enables high-density IO-Link masters
A MAX14824 block diagram of an IO-Link transceiver interfacing to an IO-Link controller to enable 24V, high-speed,
bidirectional digital communication.
IO-Link
CONTROLLER
MASTER TRANSCEIVER
RxRX
TX
RTS
TxEn
TxC
GND
V
CC
SDI
A0
VL
SCLK
24V
C/Q
A1 A2 A3 GND
SCLK
MOSI
SDO
MISO
SS
CS
DI
0.1μF
V
CC
LDO
IN
V33
1μF
TxQ
WuEn
LI
IRQ
V5
0.1μF
IRQ
GPO
GPI
MAX14824
* Future product—contact factory for availability.