19-3580; Rev 0; 2/05
±15kV ESD-Protected, +3.0V to +5.5V, 10nA,
RS-232/RS-485/RS-422 Multiprotocol Transceivers
General Description
The MAX3160E/MAX3161E/MAX3162E are programma-
ble RS-232/RS-485/RS-422 multiprotocol transceivers.
The MAX3160E/MAX3161E are pin programmable as a
2Tx/2Rx RS-232 interface or a single RS-485/RS-422
transceiver. The MAX3162E is configured as a 2Tx/2Rx
RS-232 interface, and a single RS-485/RS-422 trans-
ceiver simultaneously.
The MAX3160E/MAX3161E/MAX3162E feature enhanced
electrostatic discharge (ESD) protection. All of the trans-
mitter outputs and receiver inputs are protected to ±15kV
using the Human Body Model.
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-/RS-422-compliant perfor-
mance from a +3V to +5.5V supply. The receivers feature
true fail-safe circuitry that guarantees a logic-high receiv-
er output when the receiver inputs are open or shorted.
These devices also feature pin-selectable transmitter
slew rates for RS-232 and RS-485/RS-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/RS-422 mode and up to 1Mbps in
RS-232 mode. The MAX3160E/MAX3161E/MAX3162E
feature a 10nA shutdown mode, short-circuit limiting, and
thermal shutdown circuitry to protect against excessive
power dissipation.
The MAX3160E/MAX3162E offer a flow-through pin-
out that facilitates board layout. The MAX3160E/
MAX3161E/MAX3162E are available in tiny SSOP pack-
ages and operate over the commercial and extended
temperature ranges.
Features
♦
Single Supply Operation from +3V to +5.5V
♦
ESD Protection
±15kV Human Body Model
♦
Pin-Selectable as 2Tx/2Rx RS-232 or Single
RS-485/RS-422 (MAX3160E/MAX3161E)
♦
2Tx/2Rx RS-232 and Single RS-485/RS-422
(MAX3162E)
♦
Pin-Selectable RS-232/RS-485 Transmitter Slew
Rates Reduce EMI
♦
10Mbps RS-485 and 1Mbps RS-232 Data Rates
♦
Pin-Selectable Half-Duplex or Full-Duplex
RS-485/RS-422 Operation (MAX3160E/MAX3161E)
♦
RS-485/RS-422 True Fail-Safe Receivers
♦
10nA Shutdown Supply Current
♦
1/8-Unit Load Allows up to 256 Transceivers on
the Bus
MAX3160E/MAX3161E/MAX3162E
Ordering Information
PART
MAX3160ECAP
MAX3160EEAP
MAX3161ECAG
MAX3161EEAG
MAX3162ECAI
MAX3162EEAI
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
PACKAGE
CODE
A20-2
A20-2
A24-3
A24-3
A28-1
A28-1
Typical Operating Circuit
+3V TO +5.5V
________________________Applications
Point-of-Sales Equipment
Industrial Controls
RS-232 to RS-485
Interface Converters
Peripherals
Networking
Security Systems
TX
RTS
13
DI/T1IN
16
15
8
7
2
V
CC
RS-485/RS232
11
MAX3160E
Z(B)/T1OUT
5
6
13
14
RJ45
DB9
MAX3100
11
RX
CTS
10
SPI
12
DE485/T2IN Y(A)/T2OUT
RO/R2OUT
R1OUT
A/R2IN
B/R1IN
GND FAST HDPLX SHDN
4
10
12
9
µP
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.
±15kV ESD-Protected, +3.0V to +5.5V, 10nA,
RS-232/RS-485/RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND. .............................................................-0.3V to +6V
V+ to GND ................................................................-0.3V to +7V
V- to GND. ................................................................-7V to +0.3V
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 (V
CC
= 0 or
SHDN
= GND) ..............................................................±13.2V
T1OUT, T2OUT to GND (V
CC
= 5.5V and
SHDN
= V
CC
) .....................................................-13.2V to +9V
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 8.0mW/°C above +70°C) ...........640mW
24-Pin SSOP (derate 8.0mW/°C above +70°C) ...........640mW
28-Pin SSOP (derate 9.1mW/°C above +70°C) ...........727mW
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 V
CC
= +3.3V and T
A
= +25°C.) (Note 2)
PARAMETER
DC CHARACTERISTICS
SYMBOL
CONDITIONS
MAX3160E/MAX3161E, no load,
RS-485/
RS-232
= GND
V
CC
Standby Current
I
CC
MAX3160E/MAX3161E, no load,
RS-485/
RS-232
= V
CC
MAX3162E, no load
V
CC
Shutdown Current
I
SHDN
SHDN
= GND, receiver inputs open or
grounded
MIN
TYP
MAX
UNITS
1.2
2.5
3
0.01
2.8
5.5
6
1
µA
mA
TRANSMITTER AND LOGIC INPUTS (DI, T1IN, T2IN, DE485,
RE 4 8 5
, TE232,
R E 2 32
, FAST, HDPLX,
SHDN,
RS-485/
R S - 232
)
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
±85
±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/RS-422 RECEIVER OUTPUTS (R1OUT, R2OUT, RO)
2
_______________________________________________________________________________________
±15kV ESD-Protected, +3.0V to +5.5V, 10nA,
RS-232/RS-485/RS-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 V
CC
= +3.3V and T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
RS-232 RECEIVER INPUTS (R1IN, R2IN)
Input Voltage Range
Logic-Input Low
Logic-input High
Input Hysteresis
Input Resistance
RS-485/RS-422 RECEIVER INPUTS (Note 3)
MAX3160E
Input Resistance
R
IN
-7V < V
CM
< +12V
MAX3161E/
MAX3162E
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
I
SC
I
O
T_OUT = GND
V
OUT
=
±9V
TE232 = GND or
SHDN
=
GND
MAX3160E
MAX3161E
MAX3162E
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
V
CC
= +3.0V to 5.5V
V
CC
= 0
3
6
V
CC
= +3.3V
V
CC
= +5V
2.0
2.4
0.5
5
11
7
16
CONDITIONS
MIN
-25
TYP
MAX
+25
0.8
V
V
kΩ
UNITS
V
MAX3160E/MAX3161E/MAX3162E
MAX3160E
Input Current
I
IN
MAX3161E/MAX3162E
Input Differential Threshold
Input Hysteresis
V
TH
∆V
TH
-7V
≤
V
CM
≤
+12V
RS-232 TRANSMITTER OUTPUTS (T1OUT, T2OUT)
Output Voltage Swing
Output Resistance
Output Short-Circuit Current
Output Leakage Current
±5
300
±5.4
10M
±30
±60
±125
±25
±25
µA
V
Ω
mA
RS-485/RS-422 TRANSMITTER OUTPUTS (Y, Z)
1.5
V
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
3
V
V
|∆V
OC
|
R = 27Ω or 50Ω, Figure 1
0.2
V
_______________________________________________________________________________________
3
±15kV ESD-Protected, +3.0V to +5.5V, 10nA,
RS-232/RS-485/RS-422 Multiprotocol Transceivers
MAX3160E/MAX3161E/MAX3162E
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 V
CC
= +3.3V and T
A
= +25°C.) (Note 2)
PARAMETER
Output Short-Circuit Current
Output Leakage Current
SYMBOL
I
SC
I
O
CONDITIONS
V
Y
or V
Z
= -7V to +12V
V
Y
or V
Z
= -7V or +12V,
DE485 = GND or
SHDN
=
GND
MAX3160E
MAX3161E
MAX3162E
250
25
6
4
30
V/µs
C
L
= 150pF
to 2500pF
30
C
L
= 150pF
to 1000pF
MIN
TYP
MAX
±250
±125
±25
±25
kbps
ns
µA
UNITS
mA
RS-232 TRANSMITTER TIMING CHARACTERISTICS (SLOW MODE, FAST = GND, 250kbps, one transmitter switching)
Maximum Data Rate
Transmitter Skew
t
TSKEW
R
L
= 3kΩ, C
L
= 1000pF
R
L
= 3kΩ, C
L
= 150pF, Figure 6
V
CC
= +3.3V, T
A
= +25°C,
R
L
= 3kΩ to 7kΩ,
measured from +3.0V to
-3.0V or -3.0V to +3.0V
Transition-Region Slew Rate
RS-232 TRANSMITTER TIMING CHARACTERISTICS (FAST MODE, FAST = V
CC
, 1Mbps, one transmitter switching)
V
CC
= +3V to +4.5V, R
L
= 3kΩ, C
L
= 250pF
Maximum Data Rate
Transmitter Skew
t
TSKEW
V
CC
= +4.5V to +5.5V, R
L
= 3kΩ,
C
L
= 1000pF
R
L
= 3kΩ, C
L
= 150pF, Figure 6
V
CC
= +3.3V, T
A
= +25°C, R
L
= 3kΩ to 7kΩ, C
L
= 150pF to
1000pF, measured from +3.0V
to -3.0V or -3.0V to +3.0V
t
PHL
,t
PLH
t
RZL
,t
RZH
t
RLZ
,t
RHZ
t
RSKEW
t
DPHL
,
t
DPLH
t
DR,
t
DF
t
DSKEW
t
DZH
, t
DZL
t
DLZ
, t
DHZ
MAX3160E
MAX3161E
MAX3162E
13
24
1
1
10
150
V/µs
150
Mbps
ns
Transition-Region Slew Rate
RS-232 RECEIVER TIMING CHARACTERISTICS
Receiver Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Receiver Skew
Differential Driver Propagation
Delay
Differential Driver Rise and Fall
Time
Differential Driver Propagation
Delay Skew
Driver Output Enable Time
Driver Output Disable Time
R_IN to R_OUT, C
L
= 15pF, Figure 5
C
L
= 50pF, Figures 2, 10, MAX3162E
C
L
= 15pF, Figures 2, 10, MAX3162E
C
L
= 50pF, Figure 5
0.15
200
200
100
µs
ns
ns
ns
RS-485/RS-422 DRIVER TIMING CHARACTERISTICS (SLOW MODE, FAST = GND, 250kbps)
R
DIFF
= 54Ω, C
L
= 50pF, Figures 3, 7
R
DIFF
= 54Ω, C
L
= 50pF, Figures 3, 7
R
DIFF
= 54Ω, C
L
= 50pF, Figures 3, 7
C
L
= 50pF, Figures 4, 8
C
L
= 50pF, Figures 4, 8
400
200
200
200
400
400
800
800
200
900
400
ns
ns
ns
ns
ns
4
_______________________________________________________________________________________
±15kV ESD-Protected, +3.0V to +5.5V, 10nA,
RS-232/RS-485/RS-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 V
CC
= +3.3V and T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
RS-485/RS-422 DRIVER TIMING CHARACTERISTICS FAST MODE, FAST = V
CC
, 10Mbps)
Differential Driver Propagation
Delay
Differential Driver Rise and Fall
Times
Differential Driver Propagation
Delay Skew
Driver Output Enable Time
Driver Output Disable Time
t
DPHL,
t
DPLH
t
DR
, t
DF
t
DSKEW
t
DZH
,t
DZL
t
DHZ
,t
DLZ
t
RPLH
,
t
RPHL
t
RSKEW
t
RZL
, t
RZH
t
RLZ
, t
RHZ
R
DIFF
= 54Ω, C
L
= 50pF, Figures 3, 7
R
DIFF
= 54Ω, C
L
= 50pF, Figures 3, 7
R
DIFF
= 54Ω, C
L
= 50pF, Figures 3, 7
C
L
= 50pF, Figures 4, 8
C
L
= 50pF, Figures 4, 8
400
200
MIN
TYP
MAX
UNITS
MAX3160E/MAX3161E/MAX3162E
60
10
120
25
10
900
400
ns
ns
ns
ns
ns
RS-485/RS-422 RECEIVER TIMING CHARACTERISTICS
Receiver Propagation Delay
Receiver Propagation Delay
Skew
Receiver Output Enable Time
Receiver Output Disable Time
ESD PROTECTION
R_IN, T_OUT, A, B, Y, Z
Human Body Model
±15
kV
C
L
= 15pF, Figures 9, 11
C
L
= 15pF, Figures 9, 11
MAX3162E, C
L
= 50pF, Figures 2, 10
MAX3162E, C
L
= 15pF, Figures 2, 10
80
1
100
100
150
10
ns
ns
ns
ns
Note 2:
All currents into the device are positive. All currents out of the device are negative.
Note 3:
Applies to A, B for MAX3162E and MAX3160E/MAX3161E with HDPLX = GND, or Y, Z for MAX3160E/MAX3161E with
HDPLX = V
CC.
Typical Operating Characteristics
(V
CC
= +3.3V, 250kbps data rate, C
BYPASS
, C1, C2, C3, C4 = 0.1µF, all RS-232 transmitters (RS-232 mode) loaded with 3kΩ to
ground, T
A
= +25°C, unless otherwise noted.)
RS-232 TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE (FAST = GND)
MAX3160E toc01
RS-232 TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE (FAST = V
CC
)
DATA RATE = 1Mbps
TRANSMITTER OUTPUT VOLTAGE (V)
7.50
5.00
SLEW RATE (V/µs)
2.50
0
-2.50
-5.00
-7.50
0
500
1000
1500
2000
2500
MAX3160E toc02
RS-232 TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE (FAST = GND)
16
14
12
FALLING
10
8
6
4
2
0
0
1000
2000
3000
4000
5000
RISING
MAX3160E toc03
10.00
TRANSMITTER OUTPUT VOLTAGE (V)
7.50
5.00
2.50
0
-2.50
-5.00
-7.50
0
1000
2000
3000
4000
10.00
18
-10.00
5000
LOAD CAPACITANCE (pF)
-10.00
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
_______________________________________________________________________________________
5
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