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19-1722; Rev 1; 3/06
+3.0V to+5.5V, 1µA, RS-232/RS-485/422
Multiprotocol Transceivers
General Description
The MAX3160/MAX3161/MAX3162 are programmable
RS-232/RS-485/422 multiprotocol transceivers. The
MAX3160/MAX3161 are pin programmable as a 2TX/2RX
RS-232 interface or a single RS-485/422 transceiver. The
MAX3162 is configured as a 2TX/2RX RS-232 interface
and a single RS-485/422 transceiver simultaneously.
All devices incorporate a proprietary low-dropout trans-
mitter output stage and an on-board dual charge pump
to allow RS-232 and RS-485/422 compliant perfor-
mance from a +3V to +5.5V supply. The receivers
feature true fail-safe circuitry that guarantees a logic-
high receiver output when the receiver inputs are open
or shorted. These devices also feature pin-selectable
transmitter slew rates for both RS-232 and RS-485/422
modes. Slew-rate limiting minimizes EMI and reduces
reflections caused by improperly terminated cables,
allowing error-free data transmission up to 250kbps.
Disabling slew-rate limiting allows these devices to
transmit at data rates up to 10Mbps in RS-485/422
mode and up to 1Mbps in RS-232 mode. The
MAX3160/MAX3161/MAX3162 feature a 1µA shutdown
mode, and short-circuit limiting and thermal shutdown
circuitry to protect against excessive power dissipation.
The MAX3160/MAX3162 offer a flow-through pinout that
facilitates board layout. The MAX3160/MAX3161/
MAX3162 are available in tiny SSOP packages and
operate over the commercial and extended tempera-
ture ranges.
Features
♦
Single-Supply Operation from +3V to +5.5V
♦
Pin-Programmable as 2TX/2RX RS-232 or Single
RS-485/422 (MAX3160/MAX3161)
♦
2TX/2RX RS-232 and Single RS-485/422
(MAX3162)
♦
Pin-Programmable RS-232/RS-485 Transmitter
Slew Rates Reduce EMI
♦
10Mbps RS-485 and 1Mbps RS-232 Data Rates
♦
Pin-Programmable Half-Duplex or Full-Duplex
RS-485/422 Operation (MAX3160/MAX3161)
♦
RS-485/422 True Fail-Safe Receivers
♦
Transmitters and Receivers Protected Against
Wiring Faults
♦
1µA Shutdown Supply Current
♦
1/8-Unit Load Allows up to 256 Transceivers on
the Bus
MAX3160/MAX3161/MAX3162
Typical Operating Circuit
+3V TO +5.5V
________________________Applications
Point-of-Sales Equipment
Industrial Controls
RS-232 to RS-485
Interface Converters
Peripherals
Networking
1
V
CC
RS485/RS232 11
TX
13
MAX3100
11
DI/T1IN
MAX3160
Z(B)/T1OUT
5
Y(A)/T2OUT
6
A/R2IN
13
B/R1IN
14
GND FAST HDPLX SHDN
SPI
4
10
12
9
RJ45
DB9
Ordering Information
PART
MAX3160CAP
MAX3160EAP
MAX3161CAG
MAX3161EAG
MAX3162CAI
MAX3162EAI
TEMP RANGE
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
20 SSOP
20 SSOP
24 SSOP
24 SSOP
28 SSOP
28 SSOP
µP
16
RTS DE/T2IN
15
RX RO/R2OUT
8
12
CTS R1OUT
10
7
SHDN
Pin Configurations appear at end of data sheet.
Selector Guide appears at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
+3.0V to+5.5V, 1µA, RS-232/RS-485/422
Multiprotocol Transceivers
MAX3160/MAX3161/MAX3162
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND. .............................................................-0.3V to +6V
V+ to GND ................................................................-0.3V to +7V
V- to GND....................................................................0.3V to -7V
V+ - V- (Note 1)....................................................................+13V
Input Voltages
T1IN, T2IN, DI, DE485,
RE485,
TE232,
RE232, SHDN,
FAST, HDPLX, RS485/RS232 to GND. ...............-0.3V to +6V
A, B, R1IN, R2IN to GND ...............................................±25V
Output Voltages
T1OUT, T2OUT, Y, Z to GND......................................±13.2V
R2OUT, R1OUT, RO to GND................-0.3V to (V
CC
+ 0.3V)
Output Short-Circuit Duration
T1OUT, T2OUT, Y, Z ............................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
20-Pin SSOP (derate 9.1W/°C above +70°C) ............728mW
24-Pin SSOP (derate 9.5W/°C above +70°C) ............760mW
28-Pin SSOP (derate 10.8W/°C above +70°C) ..........864mW
Operating Temperature Ranges
MAX316_CA_ ....................................................0°C to +70°C
MAX316_EA_ .................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1:
V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
CC
= +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V±10%;
T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
DC CHARACTERISTICS
SYMBOL
CONDITIONS
MAX3160/MAX3161, no load,
RS485/
RS232
= GND
V
CC
Standby Current
I
CC
MAX3160/MAX3161, no load,
RS485/
RS232
= V
CC
MAX3162 No Load
V
CC
Shutdown Current
I
CC
SHDN
= GND, receiver inputs open or
grounded
MIN
TYP
MAX
UNITS
1.2
2.5
3.0
1
2.5
5.5
6
10
µA
mA
R
TRANSMITTER AND LOGIC INPUTS (DI, T1IN, T2IN, DE485,
RE4 85
, TE232,
R E 2 32
, FAST, HDPLX,
SHDN,
RS485/R
S2 32
)
Logic Input Low
Logic Input High
Logic Input Leakage Current
Transmitter Logic Hysteresis
Receiver Output Voltage Low
Receiver Output Voltage High
Receiver Output Short Circuit
Current
Receiver Output Leakage
Current
V
IL
V
IH
I
INL
V
HYS
V
OL
V
OH
I
OSR
I
OZR
I
OUT
= 2.5mA
I
OUT
= -1.5mA
0 < V
O
< V
CC
Receivers disabled
V
CC
- 0.6
±20
±0.05
±60
±1
V
CC
= +3.3V
V
CC
= +5V
2.0
2.4
±0.01
0.5
0.4
±1
0.8
V
V
µA
V
V
V
mA
µA
RS-232 AND RS-485/422 RECEIVER OUTPUTS (R1OUT, R2OUT, RO)
2
_______________________________________________________________________________________
+3.0V to+5.5V, 1µA, RS-232/RS-485/422
Multiprotocol Transceivers
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V±10%;
T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
RS-232 RECEIVER INPUTS (R1IN, R2IN)
Input Voltage Range
Input Threshold Low
Input Threshold High
Input Hysteresis
Input Resistance
RS-485/422 RECEIVER INPUTS (NOTE 2)
MAX3160
Input Resistance
R
IN
-7V < V
CM
< +12V
MAX3161/
MAX3162
V
CM
= +12V
V
CM
= -7V
V
CM
= +12V
V
CM
= -7V
-200
30
Both transmitter outputs loaded with 3kΩ
to GND
V
CC
= V+ = V- = 0, T_OUT = +2V
T_OUT = GND
V
OUT
=
±12V
TE232 = GND or
SHDN
=
GND
MAX3160/
MAX3161
MAX3162
R = 27Ω
(RS-485)
Differential Output Voltage
V
OD
Figure 1
R = 50Ω
(RS-422)
R = 27Ω or 50Ω, Figure 1
R = 27Ω or 50Ω, Figure 1
2
48
96
0.25
-0.15
0.125
-0.075
-50
mV
mV
mA
kΩ
3
V
CC
= +3.3V
V
CC
= +5V
V
CC
=+3.3V
V
CC
= +5V
0.5
5
7
CONDITIONS
MIN
-25
0.6
0.8
2.0
2.4
TYP
MAX
25
UNITS
V
V
V
V
kΩ
MAX3160/MAX3161/MAX3162
MAX3160
Input Current
I
IN
MAX3161/MAX3162
Input Differential Threshold
Input Hysteresis
V
TH
∆V
TH
RS-232 TRANSMITTER OUTPUTS (T1OUT, T2OUT)
Output Voltage Swing
Output Resistance
Output Short-Circuit Current
Output Leakage Current
RS-485/422 TRANSMITTER OUTPUTS (Y, Z)
1.5
V
±5
300
±5.4
10M
±30
±60
±125
±25
V
Ω
mA
µA
Change in Magnitude of
Differential Output Voltage for
Complementary Output States
Common Mode Output Voltage
Change in Magnitude of
Common Mode Output Voltage
for Complementary Output
States
∆V
OD
V
OC
-0.2
0.2
3
V
V
∆
V
OC
R = 27Ω or 50Ω, Figure 1
0.2
V
_______________________________________________________________________________________
3
+3.0V to+5.5V, 1µA, RS-232/RS-485/422
Multiprotocol Transceivers
MAX3160/MAX3161/MAX3162
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V±10%;
T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Output Short-Circuit Current
Output Leakage Current
SYMBOL
I
SC
I
O
CONDITIONS
V
Y
or V
Z
= +12V to –7V
V
Y
or V
Z
= +12V,
DE485 = GND or
SHDN
=
GND
MAX3160/
MAX3161
MAX3162
250
0.15
200
200
|t
PHL
- t
PLH
|
|t
PLH
- t
PHL
|
V
CC
= +3.3V, T
A
= +25°C,
R
L
=3kΩ to 7kΩ, measured
from +3.0V or –3.0V to
+3.0V
C
L
= 150pF
to 1000pF
C
L
= 150pF
to 2500pF
6
4
100
50
30
V/µs
30
MIN
TYP
MAX
±250
±125
±25
kbps
µs
ns
ns
ns
ns
UNITS
mA
µA
RS-232 TIMING CHARACTERISTICS (FAST = GND, 250kbps, ONE TRANSMITTER SWITCHING)
Maximum Data Rate
Receiver Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Transmitter Skew
Receiver Skew
R
L
= 3kΩ, C
L
= 1000pF
R_IN to R_OUT, C
L
= 150pF
Transition-Region Slew Rate
RS-232 TIMING CHARACTERISTICS (FAST = V
CC
, 1Mbps, ONE TRANSMITTER SWITCHING)
V
CC
= +3V to +4.5V, R
L
= 3kΩ, C
L
= 250pF
Maximum Data Rate
Receiver Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Transmitter Skew
Receiver Skew
Transition-Region Slew Rate
|t
PHL
- t
PLH
|
|t
PLH
- t
PHL
|
V
CC
= +3.3V, T
A
= +25°C, R
L
=3kΩ to 7kΩ,
C
L
= 150pF to 1000pF, measured from
+3.0V or –3.0V to +3.0V
24
V
CC
= +4.5V to +5.5V, R
L
= 3kΩ,
C
L
= 1000pF
R_IN to R_OUT, C
L
= 150pF
1
1
0.15
200
200
25
50
150
Mbps
µs
ns
ns
ns
ns
V/µs
RS-485/422 TIMING CHARACTERISTICS (FAST = GND) 250kbps
Driver Propagation Delay
Driver Rise and Fall Time
Driver Propagation Delay Skew
Driver Output Enable Time
Driver Output Disable Time
Receiver Propagation Delay
Receiver Propagation Delay
Skew
t
DPHL
,
t
DPLH
t
DPHL
,
t
DPLH
t
DSKEW
t
DZH
, t
RZL
t
DLZ
, t
DHZ
t
RPLH,
t
RPHL
t
RSKEW
R
DIFF
= 54Ω, C
L
= 50pF, Figures 3, 5
R
DIFF
= 54Ω, C
L
= 50pF, Figures 3, 5
R
DIFF
= 54Ω, C
L
= 50pF, Figure 3, 5
R
DIFF
= 54Ω, C
L
= 50pF, Figures 4, 6
R
DIFF
= 54Ω, C
L
= 50pF, Figure 4, 6
C
L
= 15pF, Figures 7, 9
C
L
= 50pF, Figures 7, 9
25
400
200
80
200
200
400
400
800
800
200
800
400
150
10
ns
ns
ns
ns
ns
ns
ns
4
_______________________________________________________________________________________
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