MAX14821 Datasheet, PDF (1/31 Pages) Maxim Integrated Products – IO-Link Device Transceiver

19-5916; Rev 0; 8/11
MAX14821
IO-Link Device Transceiver
General Description
The MAX14821 transceiver is suitable for IO-Link^®
devices and 24V binary sensors/actuators. All specified
IO-Link data rates are supported. In IO-Link applica-
tions, the transceiver acts as the physical layer interface
to a microcontroller running the data-link layer protocol.
Additional 24V digital inputs and outputs are provided.
Two internal linear regulators generate common sensor
and actuator power requirements: 5V and 3.3V.
On-board C/Q and DO drivers are independently config-
urable for push-pull, high-side (PNP), or low-side (NPN)
operation. The device detects the IO-Link C/Q wake-up
condition and generates a wake-up signal on the active-
low WU output. The C/Q and DI inputs have selectable
current loads for use in actuators.
An SPI™ interface allows configuration and monitoring of
the device. Extensive alarm conditions are detected and
communicated through the IRQ output and the SPI inter-
face. The device features reverse-polarity, short-circuit,
and thermal protection. All power lines are monitored for
undervoltage conditions.
The C/Q and DO drivers are specified for sourcing/sink-
ing up to 100mA.
The device is available in a 2.5mm x 2.5mm, 25-pin WLP
and a 4mm x 4mm, 24-pin TQFN package. Both are speci-
fied over the extended -40NC to +85NC temperature range.
Applications
IO-Link Sensors Industrial Sensors and Actuators
IO-Link Actuators
Features
S IO-Link Specification v.1.0 and v.1.1 Physical Layer-
Compliant
S Supports COM1, COM2, and COM3 Data Rates
S IO-Link Device Wake-Up Detection
S Push-Pull, High-Side, or Low-Side Outputs
S 100mA Specified C/Q Output Drive
S Auxiliary 24V, 100mA Digital Output
S Auxiliary 24V Digital Input
S Optional 6mA/7mA Current Loads at Both 24V Inputs
S 5V and 3.3V Linear Regulators
S Reverse-Polarity Protected 24V Supply Output
S EMI Emission Control Through Slew-Controlled Driver
S SPI Interface for Configuration and Monitoring
S 2.5V to 5V Logic Interface Levels
S Reverse-Polarity and Short-Circuit Protection on All
24V Inputs/Outputs
S High-Temperature Warning and Thermal Shutdown
S Extensive Fault Monitoring and Reporting
S -40NC to +85NC Operating Temperature Range
S 2.5mm x 2.5mm WLP and 4mm x 4mm TQFN
Packages
Ordering Information appears at end of data sheet.
Typical Operating Circuit
5V
3.3V
10kΩ
VCC
GPIO2
SPI
IRQ
MICROCONTROLLER _RX
TX
RTS
GPIO1
GND
1μF
0.1μF
0.1μF
UV ^{VL TXQ LDO33 V5}
LDOIN V_{P VCC}
WU
MAX14821
DO
RX
TXC
C/Q
TXEN
LO
GND
DI
0.8Ω
1μF
L+
1
2
4
3
L-
IO-Link is a registered trademark of Profibus User Organization (PNO).
SPI is a trademark of Motorola, Inc.
For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/MAX14821.related
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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.