Datasheet

MAX3140
SPI/MICROWIRE-Compatible UART with Integrated
True Fail-Safe RS-485/RS-422 Transceivers
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Typical Operating Characteristics (continued)
(V
CC
= +5V, T
A
= +25°C, unless otherwise noted.)
0.10
0.15
-60 80 100
RS-485 RECEIVER OUTPUT LOW VOLTAGE
vs. TEMPERATURE
0.20
0.50
MAX3140-10
TEMPERATURE (°C)
OUTPUT LOW VOLTAGE (V)
20
0.40
0.35
0.30
0.25
040
0.45
-40 -20 60
I
RO
= 8mA
3.8
3.9
-60 80 100
RS-485 RECEIVER OUTPUT HIGH VOLTAGE
vs. TEMPERATURE
4.0
4.5
MAX3140-11
TEMPERATURE (°C)
OUTPUT HIGH VOLTAGE (V)
20
4.3
4.2
4.1
040
4.4
-40 -20 60
I
RO
= 8mA
115
-60 100
RS-485 RECEIVER PROPAGATION DELAY
(500kbps MODE) vs. TEMPERATURE
120
140
MAX3140-12
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
40
130
125
060
135
-40 -20 20 80
C
LOAD
= 100pF
94
-60 100
RS-485 RECEIVER PROPAGATION DELAY
(10Mbps MODE) vs. TEMPERATURE
98
96
112
MAX3140-13
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
40
106
104
100
102
060
110
108
-40 -20 20 80
C
LOAD
= 100pF
20
25
-60 100
RS-485 DRIVER PROPAGATION DELAY
(10Mbps MODE) vs. TEMPERATURE
30
60
MAX3140-16
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
40
45
50
40
35
060
55
-40 -20 20 80
R
t
= 54Ω
1.90
-60 100
RS-485 DRIVER PROPAGATION DELAY
(115kbps MODE) vs. TEMPERATURE
1.95
2.20
MAX3140-14
TEMPERATURE (°C)
PROPAGATION DELAY (μs)
40
2.10
2.00
2.05
060
2.15
-40 -20 20 80
R
t
= 54Ω
520
560
-60 100
RS-485 DRIVER PROPAGATION DELAY
(500kbps MODE) vs. TEMPERATURE
600
640
920
MAX3140-15
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
40
760
800
720
680
060
840
880
-40 -20 20 80
R
t
= 54Ω
1.83
1.84
-60 100
RS-485 DRIVER DIFFERENTIAL
OUTPUT VOLTAGE vs. TEMPERATURE
1.85
1.90
MAX3140-17
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
40
1.88
1.87
1.86
060
1.89
-40 -20 20 80
R
t
= 54Ω
100
0.01
01
RS-485 DRIVER OUTPUT CURRENT
vs. DIFFERENTIAL OUTPUT VOLTAGE
0.1
10
1
MAX3140-18
DIFFERENTIAL OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
234 5