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.
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.
Applications
IO-Link Sensors Industrial Sensors and Actuators
IO-Link Actuators
5V
3.3V
Typical Operating Circuit
10Ω
1 F
0.1 F
1 F
10kΩ
V
CC
GPIO2
SPI
IRQ
MICROCONTROLLER
RX
TX
RTS
GND
GPIO1
WU
RX
TXC
TXEN
LO
DI
GND
C/Q
UV
V
L
TXQ LDO33 V
5
LDOIN V
P
0.8Ω
V
CC
1 F
MAX14821
DO
2
3
L-
1
4
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.maximintegrated.com/MAX14821.related
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
19-5916; Rev 3; 3/14
MAX14821
IO-Link Device Transceiver
Functional Diagram
LDO33
UV
UV MONITOR
3.3V LDO
5V LDO
V
CC
V
L
CS
SDI
SDO
SCLK
IRQ
RX
WAKE-UP
DETECT
DRIVER
TXQ
TXC
TXEN
LI
DI
LOAD
PROTECTION
PROTECTION
GND
DI
V
5
LDOIN
V
P
STATUS
AND
CONFIGURATION
FILTER
PROTECTION
C/Q
LOAD
C/Q
WU
LO
DRIVER
PROTECTION
DO
MAX14821
DoEn
Maxim Integrated
2
MAX14821
IO-Link Device Transceiver
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND, unless otherwise noted.)
V
CC
.........................................................................-40V to +40V
V
P
(I
VP
< 50mA) ..... the higher of -0.3V and (V
CC
- 1V) to +40V
LDOIN....................................................................-0.3V to +40V
V
5
..................... -0.3V to the lesser of (V
LDOIN
+ 0.3V) and +6V
LDO33 ..................... -0.3V to the lesser of (V
5
+ 0.3V) and +6V
V
L
.............................................................................-0.3V to +6V
DI ...........................................................................-40V to +40V
C/Q, DO...................... MIN: the higher of -40V and (V
CC
- 40V)
MAX: the lesser of +40V and (V
CC
+ 40V)
Logic Inputs
TXC, TXQ, TXEN, LO,
CS,
SDI, SCLK ..... -0.3V to (V
L
+ 0.3V)
Logic Outputs
RX,
WU,
LI, SDO,
IRQ
............................. -0.3V to (V
L
+ 0.3V)
UV ........................................................................-0.3V to +6V
Continuous Current Into Any Logic Pin ...........................
Q50mA
Continuous Power Dissipation
TQFN (derate 27.8mW/NC above +70NC)..................2222mW
WLP (derate 22.7mW/NC above +70NC)....................1816mW
Operating Temperature Range .......................... -40NC to +85NC
Maximum Junction Temperature.....................................+150NC
Storage Temperature Range............................ -65NC to +150NC
Lead Temperature (TQFN only; soldering, 10s) .............+300NC
Soldering Temperature (reflow) ......................................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (B
JA
) ..........36NC/W
Junction-to-Case Thermal Resistance (B
JC
) .................3NC/W
WLP
Junction-to-Ambient Thermal Resistance (B
JA
) ..........44NC/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 18V to 36V, V
L
= 2.3V to 5.5V, V
GND
= 0V; all logic inputs at V
L
or GND; T
A
= -40NC to +85NC, unless otherwise noted. Typical
values are at V
CC
= 24V, V
L
= 3.3V, and T
A
= +25NC, unless otherwise noted.) (Note 2)
PARAMETER
V
CC
Supply Voltage
V
CC
Supply Current
V
CC
Undervoltage-Lockout
Threshold
V
CC
Undervoltage-Lockout
Threshold Hysteresis
V
5
Supply Current
V
5
Undervoltage-Lockout
Threshold
V
L
Logic-Level Supply Voltage
V
L
Logic-Level Supply Current
V
L
Undervoltage Threshold
5V LDO (V
5
)
LDOIN Input Voltage Range
LDOIN Supply Current
Maxim Integrated
SYMBOL
V
CC
I
CC
V
CCUVLO
V
CCUVLO_HYST
I
5_IN
V
5UVLO
V
L
I
L
V
LUVLO
V
LDOIN
I
LDOIN
CONDITIONS
For driver operation
V
CC
= 24V, C/Q as input, no load on V
5
or LDO33, LDOIN not connected to V
P
,
V
LDOIN
= 24V
V
CC
falling
MIN
9
TYP
MAX
36
UNITS
V
mA
1
2.5
6
7.4
200
9
V
mV
mA
V
LDOIN shorted to V
5
, external 5V applied
to V
5
, no switching, LDO33 disabled
V
5
falling
2.3
All logic inputs at V
L
or GND
V
L
falling
0.65
7
V
LDOIN
= 24V, C/Q is configured as an
input, no load on V
5
or LDO33
3
2.0
5.5
5
0.95
1.30
36
2.5
5
V
FA
V
V
mA
3
MAX14821
IO-Link Device Transceiver
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 18V to 36V, V
L
= 2.3V to 5.5V, V
GND
= 0V; all logic inputs at V
L
or GND; T
A
= -40NC to +85NC, unless otherwise noted. Typical
values are at V
CC
= 24V, V
L
= 3.3V, and T
A
= +25NC, unless otherwise noted.) (Note 2)
PARAMETER
V
5
Output Voltage Range
SYMBOL
V
5
CONDITIONS
No load on V
5
, 7V
P
V
LDOIN
P
36V
1mA < I
LOAD
< 10mA, V
LDOIN
= 7V,
0.1FF bypass capacitor on V
5
V
5
Load Regulation
1mA < I
LOAD
< 30mA, V
LDOIN
= 7V,
0.1FF bypass capacitor on V
5,
10W–1FF
compensation network added to V
5
V
LDO33
V
LDO33UVLO
No load on LDO33
V
LDO33
falling
1mA < I
LOAD
< 20mA, V
LDOIN
= 7V
V
OH_C/Q
V
OL_C/Q
I
OH_C/Q
I
OL_C/Q
V
OH_DO
V
OL_DO
I
OH_DO
I
OL_DO
V
IN
V
IH_C/Q
V
IL_C/Q
V
HYS_C/Q
V
IH_DI
V
IL_DI
V
HYS_DI
I
PDC/Q
C/Q driver disabled, V
C/Q
= (V
CC
- 1V)
C/Q high-side enabled, I
C/Q
= -100mA,
9V
P
V
CC
P
36V
C/Q low-side enabled, I
C/Q
= +100mA,
9V
P
V
CC
P
36V
C/Q high-side enabled, V
C/Q
< (V
CC
-
3V), 9V
P
V
CC
P
36V
C/Q low-side enabled, V
C/Q
> 3V,
9V
P
V
CC
P
36V
DO high-side enabled, I
DO
= +100mA,
9V
P
V
CC
P
36V
DO low-side enabled, I
DO
= -100mA,
9V
P
V
CC
P
36V
DO high-side enabled, V
DO
< (V
CC
- 3V)
DO high-side enabled, V
DO
> 3V
For valid RX, LI
C/Q driver disabled
C/Q driver disabled
C/Q driver disabled
+100
-190
-1.0
10.5
8.0
1.0
6.8
5.2
1
100
400
8
6.4
+100
-190
V
CC
-3
V
CC
-
1.3
3.1
MIN
4.75
TYP
5.00
0.8
%
0.8
MAX
5.25
UNITS
V
3.3V LDO (LDO33)
LDO33 Output Voltage
LDO33 Undervoltage-Lockout
Threshold
LDO33 Load Regulation
24V INTERFACE
C/Q Driver Output-Voltage High
C/Q Driver Output-Voltage Low
C/Q Driver Source Current Limit
C/Q Driver Sink Current Limit
DO Driver Output-Voltage High
DO Driver Output-Voltage Low
DO Driver Source Current Limit
DO Driver Sink Current Limit
C/Q, DI Input Voltage Range
C/Q Input Threshold High
C/Q Input Threshold Low
C/Q Input Hysteresis
DI Input Threshold High
DI Input Threshold Low
DI Input Hysteresis
C/Q Weak Pulldown Current
V
CC
–
1.3
1.4
+140
-140
V
CC
-
1.6
1.6
+135
-135
3
+190
-100
V
CC
+
1.0
13.0
11.5
3
+190
-100
V
V
mA
mA
V
V
mA
mA
V
V
V
V
V
V
V
FA
3.3
2.4
0.25
3.5
V
V
%
Maxim Integrated
4
MAX14821
IO-Link Device Transceiver
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 18V to 36V, V
L
= 2.3V to 5.5V, V
GND
= 0V; all logic inputs at V
L
or GND; T
A
= -40NC to +85NC, unless otherwise noted. Typical
values are at V
CC
= 24V, V
L
= 3.3V, and T
A
= +25NC, unless otherwise noted.) (Note 2)
PARAMETER
DO Weak Pulldown Current
DI Weak Pulldown Current
C/Q Input Capacitance
DO Input Capacitance
DI Input Capacitance
C/Q, DI CURRENT SINK
C/Q Load Current
DI Load Current
I
LLM_C/Q
I
LLM_DI
C/Q load enabled
(C/QLoad = 1)
DI load enabled
(DiLoad = 1)
0V
P
V
C/Q
P
5V
5V
P
V
C/Q
0V
P
V
DI
P
5V
9V
P
V
DI
0
5
0
6
0.3 x
V
L
0.7 x
V
L
Logic input = GND or V
L
-1
5
I
OUT
= -5mA
V
L
-
0.6
-1
+115
20
+150
20
+1
0.4
+1
7.5
6.6
9
9
9
9
mA
mA
SYMBOL
I
PDDO
I
PDDI
C
C/Q
C
DO
C
DI
CONDITIONS
DO driver disabled, V
CC
= 36V,
V
DO
= (V
CC
- 1V)
DI load disabled, V
CC
= 36V,
V
DI
= (V
CC
- 1V)
C/Q driver disabled
DO driver disabled
MIN
40
50
40
40
20
TYP
MAX
120
300
UNITS
FA
FA
pF
pF
pF
LOGIC INPUTS (TXC, TXQ, TXEN, LO,
CS,
SDI, SCLK)
Logic-Input Voltage Low
Logic -Input Voltage High
Logic-Input Leakage Current
Logic-Input Capacitance
Logic-Output Voltage Low
V
IL
V
IH
I
LEAK
C
IN
V
OL
V
V
FA
pF
V
LOGIC OUTPUTS (RX,
WU,
LI, UV, SDO,
IRQ)
V
OHRX
,
V
OHWU
, V
OHLI
,
I
OUT
= 5mA (Note 3)
V
OHSDO,
V
OHIRQ
,
I
LK_SDO
SDO disabled, SDO = GND or V
L
Die temperature rising, OTemp bit is set
Die temperature falling, OTemp bit is
cleared
Die temperature rising
Logic-Output Voltage High
V
SDO Leakage Current
THERMAL SHUTDOWN
Thermal Warning Threshold
Thermal Warning Threshold
Hysteresis
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
FA
NC
NC
NC
NC
Maxim Integrated
5
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