Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
NOTES FOR ELECTRICAL/SWITCHING CHARACTERISTICS
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.
Note 2:
All typical specifications are given for V
CC
= 5V and T
A
= +25°C.
Note 3:
Supply current specification is valid for loaded transmitters when DE = 0V.
Note 4:
Applies to peak current. See
Typical Operating Characteristics.
Note 5:
The MAX481/MAX483/MAX487 are put into shutdown by bringing
RE
high and DE low. If the inputs are in this state for less
than 50ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are
guaranteed to have entered shutdown. See
Low-Power Shutdown Mode
section.
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
__________________________________________Typical Operating Characteristics
(V
CC
= 5V, T
A
= +25°C, unless otherwise noted.)
OUTPUT CURRENT vs.
RECEIVER OUTPUT LOW VOLTAGE
MAX481-01
OUTPUT CURRENT vs.
RECEIVER OUTPUT HIGH VOLTAGE
MAX481-02
RECEIVER OUTPUT HIGH VOLTAGE vs.
TEMPERATURE
4.6
OUTPUT HIGH VOLTAGE (V)
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
I
RO
= 8mA
MAX481-03
45
40
OUTPUT CURRENT (mA)
35
30
25
20
15
10
5
0
0
0.5
1.0
1.5
2.0
-20
-18
OUTPUT CURRENT (mA)
-16
-14
-12
-10
-8
-6
-4
-2
0
4.8
2.5
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
-50
-25
0
25
50
75
100
125
OUTPUT LOW VOLTAGE (V)
OUTPUT HIGH VOLTAGE (V)
TEMPERATURE (°C)
RECEIVER OUTPUT LOW VOLTAGE vs.
TEMPERATURE
MAX481-04
DRIVER OUTPUT CURRENT vs.
DIFFERENTIAL OUTPUT VOLTAGE
MAX481-05
DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs. TEMPERATURE
DIFFERENTIAL OUTPUT VOLTAGE (V)
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
-50
-25
0
25
50
75
100
125
R = 54Ω
MAX481-06
0.9
0.8
OUTPUT LOW VOLTAGE (V)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-50
-25
0
25
50
75
100
I
RO
= 8mA
90
80
OUTPUT CURRENT (mA)
70
60
50
40
30
20
10
0
2.4
125
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
DIFFERENTIAL OUTPUT VOLTAGE (V)
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
