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MAX3483/MAX3485/
MAX3486/MAX3488/
MAX3490/MAX3491
General Description
3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
The MAX3483, MAX3485, MAX3486, MAX3488,
MAX3490, and MAX3491 are 3.3V, low-power transceivers for
RS-485 and RS-422 communication. Each part contains
one driver and one receiver. The MAX3483 and MAX3488
feature slew-rate-limited drivers that minimize EMI and
reduce reflections caused by improperly terminated
cables, allowing error-free data transmission at data rates
up to 250kbps. The partially slew-rate-limited MAX3486
transmits up to 2.5Mbps. The MAX3485, MAX3490, and
MAX3491 transmit at up to 10Mbps.
Drivers are short-circuit current-limited and are protected
against excessive power dissipation by thermal shutdown
circuitry that places the driver outputs into a high-imped-
ance state. The receiver input has a fail-safe feature that
guarantees a logic-high output if both inputs are open
circuit.
The MAX3488, MAX3490, and MAX3491 feature full-
duplex communication, while the MAX3483, MAX3485, and
MAX3486 are designed for half-duplex communication.
●
Operate from a Single 3.3V Supply—
No Charge Pump!
●
Interoperable with +5V Logic
●
8ns Max Skew (MAX3485/MAX3490/MAX3491)
●
Slew-Rate Limited for Errorless Data Transmission
(MAX3483/MAX3488)
●
2nA Low-Current Shutdown Mode
(MAX3483/MAX3485/MAX3486/MAX3491)
●
-7V to +12V Common-Mode Input Voltage Range
●
Allows up to 32 Transceivers on the Bus
●
Full-Duplex and Half-Duplex Versions Available
●
Industry Standard 75176 Pinout
(MAX3483/MAX3485/MAX3486)
●
Current-Limiting and Thermal Shutdown for Driver
Overload Protection
Features
Ordering Information
PART
MAX3483CPA
MAX3483CSA
MAX3483C/D
MAX3483EPA
MAX3483ESA
MAX3485CPA
MAX3485CSA
MAX3485C/D
MAX3485EPA
MAX3485ESA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
Applications
●
●
●
●
Low-Power RS-485/RS-422 Transceivers
Telecommunications
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Ordering Information continued at end of data sheet.
*
Contact factory for for dice specifications.
Selection Table
PART
NUMBER
MAX3483
MAX3485
MAX3486
MAX3488
MAX3490
MAX3491
GUARANTEED
DATA RATE
(Mbps)
0.25
10
2.5
0.25
10
10
3.0 to 3.6
SUPPLY
VOLTAGE
(V)
HALF/FULL
DUPLEX
Half
Half
Half
Half
Half
Half
SLEW-RATE
LIMITED
Yes
No
Yes
Yes
No
No
DRIVER/
RECEIVER
ENABLE
Yes
No
Yes
Yes
No
Yes
SHUTDOWN
CURRENT
(nA)
2
2
2
—
—
2
PIN
COUNT
8
8
8
8
8
14
19-0333; Rev 1; 5/19
MAX3483/MAX3485/
MAX3486/MAX3488/
MAX3490/MAX3491
Absolute Maximum Ratings
3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
Supply Voltage (VCC) .............................................................7V
Control Input Voltage (RE, DE) .................................-0.3V to 7V
Driver Input Voltage (DI)............................................-0.3V to 7V
Driver Output Voltage (A, B, Y, Z) ........................-7.5V to 12.5V
Receiver Input Voltage (A, B) ...............................-7.5V to 12.5V
Receiver Output Voltage (RO) ................. -0.3V to (V
CC
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ..727mW
8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW
14-Pin Plastic DIP (derate 10mW/°C above +70°C) ...800mW
14-Pin SO (derate 8.33mW/°C above +70°C).............667mW
Operating Temperature Ranges
MAX34_ _C_ _ ...................................................0°C to +70°C
MAX34_ _E_ _ ............................................... -40°C to +85°C
Junction Temperature ......................................................+160°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
Package Information
14 SOIC
PACKAGE CODE
Outline Number
Land Pattern Number
Thermal Resistance, Single-Layer Board:
Junction to Ambient (θ
JA
)
Junction to Case (θ
JA
)
Thermal Resistance, Four-Layer Board:
Junction to Ambient (θ
JA
)
Junction to Case (θ
JA
)
84
34
120
37
21-0041
90-0112
S14+1
For the latest package outline information and land patterns (footprints), go to
www.maximintegrated.com/packages.
Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board.
For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
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Maxim Integrated
│
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MAX3483/MAX3485/
MAX3486/MAX3488/
MAX3490/MAX3491
DC Electrical Characteristics
PARAMETER
Differential Driver Output
Change in Magnitude of Driver
Differential Output Voltage for
Complementary Output States
(Note 1)
Driver Common-Mode Output
Voltage
Change in Magnitude of
Common-Mode Output Voltage
(Note 1)
Input High Voltage
Input Low Voltage
Logic Input Current
Input Current (A, B)
Output Leakage (Y, Z)
Output Leakage (Y, Z)
in Shutdown Mode
Receiver Differential
Threshold Voltage
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
Three-State (High Impedance)
Output Current at Receiver
Receiver Input Resistance
3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
(V
CC
= 3.3V ±0.3V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C)
SYMBOL
V
OD
CONDITIONS
R
L
= 100Ω (RS-422), Figure 4
R
L
= 54Ω (RS-485), Figure 4
R
L
= 60Ω (RS-485), V
CC
= 3.3V, Figure 5
ΔV
OD
R
L
= 54Ω or 100Ω, Figure 4
MIN
2.0
1.5
1.5
V
TYP
MAX
UNITS
0.2
V
V
OC
ΔV
OC
V
IH
V
IL
I
IN1
I
IN2
I
O
I
O
V
TH
ΔV
TH
V
OH
V
OL
I
OZR
R
IN
I
CC
R
L
= 54Ω or 100Ω, Figure 4
R
L
= 54Ω or 100Ω, Figure 4
DE, DI, RE
DE, DI, RE
DE, DI, RE
DE = 0V,
V
CC
= 0V or 3.6V
DE = 0V, RE = 0V,
V
CC
= 0V or 3.6V, MAX3491
DE = 0V, RE = V
CC
,
V
CC
= 0V or 3.6V, MAX3491
-7V ≤ V
CM
≤ 12V
V
CM
= 0V
I
OUT
= -1.5mA, V
ID
= 200mV, Figure 6
I
OUT
= 2.5mA, V
ID
= 200mV, Figure 6
V
CC
= 3.6V, 0V ≤ V
OUT
≤ V
CC
-7V ≤ V
CM
≤ 12V
No load,
DI = 0V or V
CC
DE = V
CC
,
RE = 0V or V
CC
DE = 0V,
RE = 0V
12
1.1
0.95
0.002
V
CC
- 0.4
V
IN
= 12V
V
IN
= -7V
V
OUT
= 12V
V
OUT
= -7V
V
OUT
= 12V
V
OUT
= -7V
-0.2
50
2.0
3
0.2
V
V
V
0.8
±2
1.0
-0.8
20
-20
1
-1
0.2
V
μA
mA
μA
μA
V
mV
V
0.4
±1
V
μA
kΩ
2.2
mA
1.9
1
-250
250
µA
mA
mA
Supply Current
Supply Current in Shutdown
Mode
Driver Short-Circuit Output
Current
Receiver Short-Circuit Output
Current
I
SHDN
I
OSD
I
OSR
DE = 0V, RE = V
CC
, DI = V
CC
or 0V
V
OUT
= -7V
V
OUT
= 12V
0V ≤ V
RO
≤ V
CC
±8
±60
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Maxim Integrated
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3
MAX3483/MAX3485/
MAX3486/MAX3488/
MAX3490/MAX3491
(V
CC
= 3.3V, T
A
= +25°C)
3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
Driver Switching Characteristics—MAX3485, MAX3490, and MAX3491
PARAMETER
Driver Differential Output Delay
Driver Differential Output Transition Time
Driver Propagation Delay, Low-to-High Level
Driver Propagation Delay, High-to-Low Level
|t
PLH
- t
PHL
| Driver Propagation Delay Skew (Note 2)
Driver Output Enable Time to Low Level
Driver Output Enable Time to High Level
Driver Output Disable Time from High Level
Driver Output Disable Time from Low Level
Driver Output Enable Time from Shutdown to Low Level
Driver Output Enable Time from Shutdown to High Level
SYMBOL
t
DD
t
TD
t
PLH
t
PHL
t
PDS
t
PZL
t
PZH
t
PHZ
t
PLZ
t
PSL
t
PSH
CONDITIONS
R
L
= 60Ω, Figure 7
R
L
= 60Ω, Figure 7
R
L
= 27Ω, Figure 8
R
L
= 27Ω, Figure 8
R
L
= 27Ω, Figure 8
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 9
R
L
= 110Ω, Figure 9
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 9
45
45
40
40
650
650
MIN
1
3
7
7
TYP
22
8
22
22
MAX
35
25
35
35
8
90
90
80
80
900
900
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
DRIVER OUTPUT ENABLE/DISABLE TIMES (MAX3485/MAX3491 only)
(V
CC
= 3.3V, T
A
= +25°C)
Driver Switching Characteristics—MAX3486
PARAMETER
Driver Differential Output Delay
Driver Differential Output Transition Time
Driver Propagation Delay, Low-to-High Level
Driver Propagation Delay, High-to-Low Level
|t
PLH
- t
PHL
| Driver Propagation Delay Skew (Note 2)
Driver Output Enable Time to Low Level
Driver Output Enable Time to High Level
Driver Output Disable Time from High Level
Driver Output Disable Time from Low Level
Driver Output Enable Time from Shutdown to Low Level
Driver Output Enable Time from Shutdown to High Level
SYMBOL
t
DD
t
TD
t
PLH
t
PHL
t
PDS
t
PZL
t
PZH
t
PHZ
t
PLZ
t
PSL
t
PSH
CONDITIONS
R
L
= 60Ω, Figure 7
R
L
= 60Ω, Figure 7
R
L
= 27Ω, Figure 8
R
L
= 27Ω, Figure 8
R
L
= 27Ω, Figure 8
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 9
R
L
= 110Ω, Figure 9
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 9
55
55
45
45
700
700
MIN
24
15
20
20
TYP
48
35
48
48
MAX
70
60
70
70
11
100
100
80
80
1000
1000
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
www.maximintegrated.com
Maxim Integrated
│
4
MAX3483/MAX3485/
MAX3486/MAX3488/
MAX3490/MAX3491
(V
CC
= 3.3V, T
A
= +25°C)
3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
Driver Switching Characteristics—MAX3483 and MAX3488
PARAMETER
Driver Differential Output Delay
Driver Differential Output Transition Time
Driver Propagation Delay, Low-to-High Level
Driver Propagation Delay, High-to-Low Level
|t
PLH
- t
PHL
| Driver Propagation Delay Skew (Note 2)
Driver Output Enable Time to Low Level
Driver Output Enable Time to High Level
Driver Output Disable Time from High Level
Driver Output Disable Time from Low Level
Driver Output Enable Time from Shutdown to Low Level
Driver Output Enable Time from Shutdown to High Level
SYMBOL
t
DD
t
TD
t
PLH
t
PHL
t
PDS
t
PZL
t
PZH
t
PHZ
t
PLZ
t
PSL
t
PSH
CONDITIONS
R
L
= 60Ω, Figure 7
R
L
= 60Ω, Figure 7
R
L
= 27Ω, Figure 8
R
L
= 27Ω, Figure 8
R
L
= 27Ω, Figure 8
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 9
R
L
= 110Ω, Figure 9
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 10
R
L
= 110Ω, Figure 9
MIN
600
400
700
700
TYP
900
700
1000
1000
100
900
600
50
50
1.9
2.2
1300
800
80
80
2.7
3.0
MAX
1400
1200
1500
1500
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
DRIVER OUTPUT ENABLE/DISABLE TIMES (MAX3485/MAX3491 only)
(V
CC
= 3.3V, T
A
= +25°C)
PARAMETER
Time to Shutdown
Receiver Switching Characteristics
SYMBOL
t
SHDN
t
RPLH
t
RPHL
t
RPDS
t
PRZL
t
PRZH
t
PRHZ
t
PRLZ
t
PRSL
t
PRSH
CONDITIONS
MAX3483/MAX3485/MAX3486/MAX3491 only
(Note 3)
V
ID
= 0V to 3.0V, C
L
= 15pF, Figure 11
MAX3483/MAX3488
V
ID
= 0V to 3.0V, C
L
= 15pF, Figure 11
MAX3483/MAX3488
V
ID
= 0V to 3.0V, C
L
= 15pF, Figure 11
MAX3483/MAX3488
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
C
L
= 15pF, Figure 12,
MAX3483/MAX3485/MAX3486/MAX3491 only
25
25
25
25
720
720
MIN
80
25
25
25
25
TYP
190
65
75
65
75
MAX
300
90
120
90
120
10
20
50
50
45
45
1400
1400
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Receiver Propagation Delay,
Low-to-High Level
Receiver Propagation Delay,
High-to-Low Level
|t
PLH
- t
PHL
| Receiver
Propagation Delay Skew
Receiver Output Enable Time
to Low Level
Receiver Output Enable Time
to High Level
Receiver Output Disable
Time from High Level
Receiver Output Disable
Time from Low Level
Receiver Output Enable Time
from Shutdown to Low Level
Receiver Output Enable Time
from Shutdown to High Level
Note 1:
ΔV
OD
and ΔV
OC
are the changes in V
OD
and V
OC
, respectively, when the DI input changes state.
Note 2:
Measured on |t
PLH
(Y) - t
PHL
(Y)| and |t
PLH
(Z) - t
PHL
(Z)|.
Note 3:
The transceivers are put into shutdown by bringing
RE
high and DE low. If the inputs are in this state for less than 80ns,
the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 300ns, the parts are guaranteed to
have entered shutdown. See
Low-Power Shutdown Mode
section.
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