MAX14827A Datasheet, PDF (19/42 Pages) Maxim Integrated Products – High Configurability and Integration Reduce SKUs

MAX14827A
Low-Power, Ultra-Small, Dual Driver,
IO-Link Device Transceiver
Pin Description (continued)
PIN
TQFN WLP
3
C2
4
C1
5
B1
6
B2
NAME
TXEN
TX
V5
REG
PIN
DESCRIPTION
C/Q Driver
Enable Logic
Input
C/Q Driver
Communication
Input
5V Power-
Supply Input/
Output
5V Regulator
Control Output
PARALLEL
MODE
(SPI/PIN = High)
UARTSEL = Low
FUNCTION
MULTIPLEXED MODE
(SPI/PIN = High)
UARTSEL = High
PIN MODE
(SPI/PIN = Low)
Drive TXEN high
to enable the
C/Q driver. See
Table 1.
With CS/PP low and
ENMPX = 0, drive TXEN
high to enable C/Q.
Drive TXEN high to
enable the C/Q driver.
Drive TXEN low to disable
the C/Q driver and enable
the C/Q receiver.
The logic on the
C/Q output is
the inverse logic
level of the signal
on the TX input.
See Table 1.
With CS/PP low and
ENMPX = 0, the logic
on the C/Q output is the
inverse logic level of the
signal on the SDI/TX/
NPN input. Signals on
TX are ignored. See the
Mode Selection table.
The logic on the C/Q
output is the inverse logic
level of the signal on the
TX input when TXEN is
high.
5V must be present on V5 for normal operation. Bypass V5 to GND with
a 1μF capacitor. V5 can be supplied by the internal 5V linear regulator
or by an external regulator. To use the internal regulator, connect V5 to
REG, or to the emitter of an external NPN transistor. To bypass the internal
regulator, connect an external 5V supply directly to V5.
To use the internal linear regulator, connect REG to V5 or connect REG to
the base of an external NPN pass transistor. Leave REG unconnected and
connect V5 to an external 5V supply to bypass the internal regulator.
LED1 is a 5V logic output. Connect a
current-limiting resistor in series between LED1 is a 5V logic output.
LED1 and the LED to limit the LED current. Connect a current-limiting
LED1 can be controlled by driving the
resistor in series between
7
B3
LED1
LED Driver
Output 1
LED1IN high or low, of through the SPI
LED1 and the LED to limit
interface. Set the LED1b bit high to turn on the LED current. Drive the
the LED, clear the LED1b bit to turn off the LED1IN input high to turn on
LED. Alternatively, drive the LED1IN input the LED, drive LED1IN low
high to turn on the LED, drive LED1IN low to turn off the LED.
to turn off the LED. See Table 2.
—
C3
LED2
LED Driver
Output 2
LED2 is a 5V logic output. Connect a
current-limiting resistor in series between
LED2 and the LED to limit the LED current.
Set the LED2b bit high to turn on the LED,
clear the LED2b bit to turn off the LED.
LED2 cannot be controlled
in pin-mode. LED2 is off.
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