Datasheet

MAX1482/MAX1483
20µA,
1
⁄
8
-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
Supply Voltage (V
CC
)...............................................................7V
Control Input Voltages (RE, DE) .................-0.5V to (V
CC
+ 0.5V)
Driver Input Voltage (DI).............................-0.5V to (V
CC
+ 0.5V)
Driver Output Voltages ..........................................-7.5V to 12.5V
Receiver Input Voltages (A, B) ..............................-7.5V to 12.5V
Receiver Output Voltage (RO)....................-0.5V to (V
CC
+ 0.5V)
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) .....727mW
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) .800mW
8-Pin SO (derate 5.88mW/°C above +70°C)..................471mW
14-Pin SO (derate 8.33mW/°C above +70°C)................667mW
8-Pin µMAX (derate 4.10mW/°C above +70°C) .............330mW
Operating Temperature Ranges
MAX148_C_ _ .......................................................0°C to +70°C
MAX148_E_ _.....................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
V
V
IN
= -7V
V
IN
= 12V
V
IN
= -7V
V
IN
= 12V
Input Current
(A, B)
I
IN2
V
TH
kΩ96-7V ≤ V
CM
≤ 12V
R = 27Ω (RS-485), Figure 1
0.4V ≤ V
O
≤ 2.4V
R = 50Ω (RS-422), Figure 1
I
O
= 4mA, V
ID
= -200mV
I
O
= -4mA, V
ID
= 200mV
V
CM
= 0V
-7V ≤ V
CM
≤ 12V
DE, DI,
–
R
—
E
–
DE, DI,
–
R
—
E
–
MAX1483,
DE = 0V, V
CC
= 0V or 5.25V
R = 27Ω or 50Ω, Figure 1
R = 27Ω or 50Ω, Figure 1
R = 27Ω or 50Ω, Figure 1
MAX1482,
DE = 0V, V
CC
= 0V or 5.25V
CONDITIONS
µA±1I
OZR
Three-State (high impedance)
Output Current at Receiver
V
0.4V
OL
Receiver Output Low Voltage
3.5V
OH
Receiver Output High Voltage
mV75∆V
TH
Receiver Input Hysteresis
V-0.2 0.2
Receiver Differential Threshold
Voltage
-150
200
µA
-100
150
1.5 5
V
OD2
Differential Driver Output
(with load)
V
25
V5V
OD1
Differential Driver Output (no load)
µA±2I
IN1
Logic Input Current
V0.8V
IL
Logic Input Low Voltage
V0.2∆V
OD
Change in Magnitude of Driver
Common-Mode Output Voltage
for Complementary Output States
V0.2∆V
OD
Change in Magnitude of Driver
Differential Output Voltage for
Complementary Output States
V3V
OC
Driver Common-Mode Output
Voltage
UNITSMIN TYP MAXSYMBOLPARAMETER
R
IN
Receiver Input Resistance
Note 1: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device
ground unless otherwise specified.
DE, DI,
–
R
—
E
–
V2.0V
IH
Logic Input High Voltage
MAX1482 only,
-7V < V
Y and
V
Z
< 12V
µA±50I
OZD
Three-State (high impedance)
Output Current at Driver