MAX14821

IO-Link Device Transceiver

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19-5916; Rev 1; 2/12

General Description

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

IO-Link is a registered trademark of Profibus User Organization (PNO).

SPI is a trademark of Motorola, Inc.

Ordering Information appears at end of data sheet.

Typical Operating Circuit

1

2

4

3

10kΩ

MAX14821

0.8Ω

1F

0.1F

1F

0.1F

UV

GPIO2

LDOIN

DO

SPI

C/Q

L+

L-

GND

DI

GND

LDO33

TXQ

MICROCONTROLLER

WU

IRQ

RX

RX

TXC

TX

TXEN

RTS

LO

GPIO1

3.3V

5V

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.