MAX3162 MAXIM [Maxim Integrated Products], MAX3162 Datasheet - Page 20

• Manufacturer Part Number: MAX3162
• Description: +3.0V to +5.5V, 1uA, RS-232/RS-485/422 Multiprotocol Transceivers
• Manufacturer: MAXIM [Maxim Integrated Products]

+3.0V to+5.5V, 1µA, RS-232/RS-485/422
Multiprotocol Transceivers
The Typical Application Circuit shows the MAX3161 con-
figured as a multiprotocol bus multiplexer. The MAX3161
separates the RS-232 and RS-485 lines, but shares the
logic pins between modes. This application allows the
µP to monitor a point-to-point RS-232 bus, and a mul-
tidrop RS-485 interface. The MAX3100 UART asynchro-
nously transfers data through the MAX3161 to the
pin-selected RS-232 or RS-485 protocol.
Figure 14. RS-485 Line Repeater
20
NOTE: RE485 ON MAX3162 ONLY
______________________________________________________________________________________
DE485
RE485
RO
DI
Multiprotocol Bus Multiplexer
D
R
A
B
Z
Y
120Ω
120Ω
MAX3160
MAX3161
MAX3162
DATA IN
DATA OUT
Figure 15. Protocol Translator
RCV
RTS
TX
100nF
C2
C3
100nF
23
22
13
10
23
19
20
15
16
14
28
5
C2+
C2-
SHDN
T1OUT
R2OUT
DI
R2IN
R1IN
RE232
TE232
FAST
V+
MAX3162
3.3V
GND
V
CC
2
R1OUT
RE485
TE485
T1IN
C1+
C1-
RO
V-
A
B
Y
Z
12
1
3
24
11
9
22
17
18
6
25
7
C
100nF
BYPASS
C1
100nF
C4
100nF