MAX14826 Datasheet, PDF (16/32 Pages) Maxim Integrated Products – IO-Link Device Transceiver

MAX14826
IO-Link Device Transceiver
Pin Description (continued)
PIN
NAME
FUNCTION
10
SPI/PAR
SPI-Mode/Parallel-Mode Select Input. Drive SPI/ PAR high to enable SPI functionality. Drive SPI/PAR low
to enable parallel-mode operation.
11
DODIS
DO Disable Input. Drive DODIS low to enable the DO output. Drive DODIS high to disable the DO
output. DO is high-impedance when DODIS is high.
12
TX
Transmit Communication Input. The logic on the C/Q output is the inverse logic level of the signals on the
TX input.
13
TXEN
Transmitter Enable. Drive TXEN high to enable the C/Q transmitter. TXEN is referenced to V_L.
14
RX
Receiver Output. RX is the inverse logic level of C/Q. RX is always high when the RxDis bit in the
CQConfig register is set to 1.
Wake-up Output/Active-Low Thermal-Shutdown Indicator. In SPI mode, WU/THSD is the wake-up output.
15
WU/THSD
In this mode, WU/THSD pulses low for 190µs (typ) when a valid wake-up pulse is detected on the C/Q
line. In parallel mode, WU/THSD is the thermal-shutdown indicator and asserts low during thermal
shutdown. WU/THSD is a push-pull output referenced to V_L.
16
LO
Logic Input of the DO Output. LO is the logic input that drives DO. LO is referenced to V_L.
17
LI
Logic Output of the 24V DI Logic Input. LI is the inverse logic of DI. LI is referenced to V_L.
18
UV
Open-Drain Undervoltage Indicator Output. In case of an undervoltage, the UV open-drain transistor is off.
19
DI
24V Logic-Level Digital Input
20
GND
Ground
SIO/IO-Link Data Input/Output. Drive TXEN high to enable the C/Q driver. The logic on the C/Q output is
21
C/Q
the inverse logic level of the signals on the TX input. RX is the logic inverse of C/Q. The C/Q driver output
level can be set by the TX input or programmed by the Q bit. The level on C/Q can be read by the RX
ouput or the QLvl bit.
22
DO
24V Logic-Level Digital Output. DO is the inverse logic level of the LO input and can be digitally-controlled
through the DIOConfig register.
23
V_CC
Power-Supply Input. Bypass V_CC to GND with a 1µF ceramic capacitor.
24
V_P
Protected 24V Supply Output. V_P is one diode drop below V_CC. V_P is reverse-polarity-protected and can
be used as a 24V protected supply to the sensor or actuator electronics.
—
EP
Exposed Pad. Connect EP to GND.
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