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MAX3160EEAP+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26
MAX3160E/MAX3161E/MAX3162E
±15kV ESD-Protected, +3.0V to +5.5V, 10nA,
RS-232/RS-485/RS-422 Multiprotocol Transceivers
______________________________________________________________________________________ 19
Multiprotocol Bus
The Typical Operating Circuit shows a standard appli-
cation for the MAX3160E. The MAX3160E’s outputs are
multiplexed between RS-232 and RS-485 protocols by
a microprocessor (µP). The µP also directs the shut-
down functions, enable lines, and the duplex of the
MAX3160E. Data is transmitted to the MAX3100 UART
through an SPI™ port. The UART asynchronously
transfers data through the MAX3160E to the pin-select-
ed RS-232 or RS-485 protocal. See Table 14 for com-
monly used cable connections.
Multiprotocol Bus Multiplexer
The Typical Application Circuit shows the MAX3161E
configured as a multiprotocol bus multiplexer. The
MAX3161E 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 multidrop RS-485 interface. The MAX3100 UART asyn-
chronously transfers data through the MAX3161E to the
pin-selected RS-232 or RS-485 protocol.
1µs/div
R
OUT
T
OUT
5V/div
T
IN
1µs/div
R
OUT
Figure 15. MAX3161E/MAX3162E RS-232 Loopback Test Result
at 250kbps, FAST = Low
200ns/div
T
OUT
5V/div
R
OUT
T
IN
Figure 16. MAX3161E/MAX3162E RS-232 Loopback Test Result
at 1Mbps, FAST = High
SPI is a registered trademark of Motorola, Inc.
MAX3160E/MAX3161E/MAX3162E
±15kV ESD-Protected, +3.0V to +5.5V, 10nA,
RS-232/RS-485/RS-422 Multiprotocol Transceivers
20 ______________________________________________________________________________________
A
B
Z
D DATA OUT
DATA IN
R
DI
DE485
RE485
RO
Y
120Ω
120Ω
NOTE: RE485 ON MAX3162E ONLY
MAX3160E
MAX3161E
MAX3162E
Figure 17. RS-485 Line Repeater
MAX3162E
R1OUT
RO
RE485
DE485
A
B
Z
Y
V-
R1IN
RE232
TE232
FAST
V+
T1OUT
C2-
C2+
C1-
C1+
V
CC
T1IN
R2OUT
DI
R2IN
GND
27
26
13
5
10
23
19
20
15
16
14
28
25
7
6
18
17
22
12
9
11
24
3
1
C1
100nF
C2
100nF
RCV
TX
RTS
C3
100nF
C4
100nF
2
3.3V
C
BYPASS
100nF
SHDN
Figure 18. Protocol Translator
MAX3160E/MAX3161E/MAX3162E
±15kV ESD-Protected, +3.0V to +5.5V, 10nA,
RS-232/RS-485/RS-422 Multiprotocol Transceivers
______________________________________________________________________________________ 21
INPUTS OUTPUTS
SHDN
RS-485/
RR
RR
SS
SS
--
--
22
22
33
33
22
22
DI/T1IN,
DE485/T2IN
Z(B)/T1OUT,
Y(A)/T2OUT
0X X
1/8-unit load
10 0 1
10 1 0
11 X
RS-485 mode
Table 1. MAX3160E
INPUTS OUTPUTS
SHDN
RS-485/
RR
RR
SS
SS
--
--
22
22
33
33
22
22
DI/T1IN,
DE485/T2IN
T1OUT, T2OUT
0X X
High-impedance
10 0 1
10 1 0
11 X
High-impedance
Table 2. MAX3161E
INPUTS OUTPUTS
SHDN TE232 T1IN,T2IN
T1OUT, T2OUT
0X X
High-impedance
X0 X
High-impedance
11 0 1
11 1 0
Table 3. MAX3162E
INPUTS OUTPUTS
SHDN
RS-485/
RR
RR
SS
SS
--
--
22
22
33
33
22
22
B/R1IN,
A/R2IN
R1OUT,
RO/R2OUT
X0 0 1
X0 1 0
X0
Inputs open
1
X1 X
R1OUT
High-impedance,
RO/R2OUT in
RS-485 mode
Table 4. MAX3160E
INPUTS OUTPUTS
SHDN
RS-485/
RR
RR
SS
SS
--
--
22
22
33
33
22
22
R1IN, R2IN
R1OUT,
RO/R2OUT
X0 0 1
X0 1 0
X 0 Inputs open 1
X1 X
R1OUT
High-impedance,
RO/R2OUT in
RS-485 mode
Table 5. MAX3161E
INPUTS OUTPUTS
SHDN
RR
RR
EE
EE
22
22
33
33
22
22
R1IN, R2IN
R1OUT, R2OUT
X1 X
High-impedance
X0 0 1
X0 1 0
X0
Inputs open
1
Table 6. MAX3162E
RS-232 Transmitters Truth Tables RS-232 Receivers Truth Tables
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26

MAX3160EEAP+

Mfr. #:
Buy MAX3160EEAP+
Manufacturer:
Maxim Integrated
Description:
RS-422/RS-485 Interface IC 3-5.5V 1uA Tcvr Multiprotocol
Lifecycle:
New from this manufacturer.
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