參數(shù)資料
型號： MAX14824ETG+T
廠商： Maxim Integrated Products
文件頁數(shù)： 17/28頁
文件大?。?/td> 0K
描述： IC IO-LINK MASTER TXRX 24TQFN
標準包裝： 2,500
系列： *
24
MAX14824
IO-Link Master Transceiver
Address Selection
The device includes four chip-select address inputs,
A0–A3, allowing up to 16 devices on a single bus. Drive
the address inputs high or low to program the device
address as shown in Table 7. Do not leave any address
input unconnected.
Applications Information
UART Interfacing
The logic level of the MAX14824 microcontroller’s UART
interface I/Os (TXC, TXQ, TXEN, and RX) is defined by VL.
The device can be interfaced to microcontrollers whose
on-board UART TX output cannot be programmed as a
logic output (GPO). In this case, connect the TX output
of the UART to the TXC input for IO-Link communication
and connect a separate GPO output on the microcon-
troller to TXQ for standard IO (SIO) mode operation
(Figure 10). As the TXQ and TXC inputs are internally
logically ANDed, the unused input (TXC or TXQ) must be
held high while the other is in operation.
Transient Protection
Inductive load switching, surges, ESD and short circuits
create high transient voltages. C/Q and DI must be pro-
tected against high overvoltage and undervoltage tran-
sients. Positive voltage transients on DI must be limited to
+55V relative to GND and negative voltage transients must
be limited to -55V (relative to GND) on DI. Two Schottky
diodes having low forward voltage, like the DLFS240, must
be connected to C/Q to clamp under- and overvoltage
transients. Figure 11 shows suitable protection to meet
IEC 61000-4-2 ESD testing. For reduction of bit errors
induced by burst transients, enable the receiver filters
and add capacitors to C/Q and DI. If surge tests need to
be met, a TVS diode is recommended on VCC.
Figure 10. UART Interface
Figure 11. MAX14824 Operating Circuit with TVS Protection
Table 7. Address Input Selection
A3
A2
A1
A0
DEVICE ADDRESS
Low
0x00
Low
High
0x01
Low
High
Low
0x02
Low
High
0x03
Low
High
Low
0x04
Low
High
Low
High
0x05
Low
High
Low
0x06
Low
High
0x07
High
Low
0x08
High
Low
High
0x09
High
Low
High
Low
0x0A
High
Low
High
0x0B
High
Low
0x0C
High
Low
High
0x0D
High
Low
0x0E
High
0x0F
MICROCONTROLLER
TXQ
GPO
TXC
TX
TXEN
RTS
RX
MAX14824
1nF
270pF
VCC
C/Q
DFLS240
SDC36C
1F
270pF
GND
DI
DFLS240
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