MAX3140 Maxim, MAX3140 Datasheet - Page 29

• Manufacturer Part Number: MAX3140
• Description: SPI/MICROWIRE-Compatible UART with Integrated True Fail-Safe RS-485/RS-422 Transceivers
• Manufacturer: Maxim

Figure 24. Typical Half-Duplex Operating Circuit
Figure 25. Typical Half-Duplex RS-485 Network
SPI/MICROWIRE-Compatible UART with Integrated
DE
RO
RE
DI
*NOTE: TO SHUT DOWN THE RS-485 TRANSCEIVER, DRIVE RE SEPARATELY.
D
MAX3140
______________________________________________________________________________________
True Fail-Safe RS-485/RS-422 Transceivers
R
+5V
Y
Z
V
120
CC
100k
V
H/F
SHDN
CTS
RTS
TX
RX
RO
DI
DE
RE*
SRL
B
CC
DI
D
D
R
MAX3140
A
DE
UART
RO
R
RE
DOUT
SCLK
RXP
DIN
TXP
IRQ
CS
X1
X2
Z
Y
V
CC
HALF-DUPLEX
RS-485 I/O
B
10k
DI
D
A
DE
RO
120
R
RE
P
A
B
R
D
RO
DE
DI
RE
29