Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
30
0
02.5
OUTPUT CURRENT vs.
RECEIVER OUTPUT LOW VOLTAGE
5
25
OUTPUT LOW VOLTAGE (V)
1.5
15
10
0.5
1.0
2.0
20
35
40
45
0.9
0.1
-50
-25
25
75
RECEIVER OUTPUT LOW VOLTAGE vs.
TEMPERATURE
0.3
0.7
TEMPERATURE (°C)
050
0.5
0.8
0.2
0.6
0.4
0
100
125
IRO = 8mA
-20
-4
1.5
2.0
3.0
5.0
OUTPUT CURRENT vs.
RECEIVER OUTPUT HIGH VOLTAGE
-8
-16
OUTPUT HIGH VOLTAGE (V)
2.5
4.0
-12
-18
-6
-14
-10
-2
0
3.5
4.5
4.8
3.2
-50
-25
25
75
RECEIVER OUTPUT HIGH VOLTAGE vs.
TEMPERATURE
3.6
4.4
TEMPERATURE (°C)
050
4.0
4.6
3.4
4.2
3.8
3.0
100
125
IRO = 8mA
90
0
01.0
3.04.5
DRIVER OUTPUT CURRENT vs.
DIFFERENTIAL OUTPUT VOLTAGE
10
70
DIFFERENTIAL OUTPUT VOLTAGE (V)
2.0
4.0
50
30
80
60
40
20
0.5
1.5
2.5
3.5
2.3
1.5
-50
-25
25
125
DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs. TEMPERATURE
1.7
2.1
TEMPERATURE (
°C)
075
1.9
2.2
1.6
2.0
1.8
100
50
2.4
R = 54
Ω
__________________________________________Typical Operating Characteristics
(VCC = 5V, TA = +25°C, unless otherwise noted.)
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 VCC = 5V and TA = +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 HWD481/HWD483/HWD487 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.
5
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