MAX3140 Maxim, MAX3140 Datasheet - Page 9

• Manufacturer Part Number: MAX3140
• Description: SPI/MICROWIRE-Compatible UART with Integrated True Fail-Safe RS-485/RS-422 Transceivers
• Manufacturer: Maxim

(V
SPI/MICROWIRE-Compatible UART with Integrated
CC
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
112
110
108
106
104
102
100
98
96
94
60
55
50
45
40
35
30
25
20
= +5V, T
RS-485 RECEIVER OUTPUT LOW VOLTAGE
-60
-60
-60
RS-485 RECEIVER PROPAGATION DELAY
RS-485 DRIVER PROPAGATION DELAY
(10Mbps MODE) vs. TEMPERATURE
(10Mbps MODE) vs. TEMPERATURE
C
-40
-40 -20
-40 -20
R
I
LOAD
RO
t
= 54
= 8mA
A
= 100pF
-20
= +25°C, unless otherwise noted.)
vs. TEMPERATURE
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
0
_______________________________________________________________________________________
True Fail-Safe RS-485/RS-422 Transceivers
20
20
20
40
40
40
60
60
60
80
80
80
100
100
100
2.20
2.15
2.10
2.05
2.00
1.95
1.90
1.90
1.89
1.88
1.87
1.86
1.85
1.84
1.83
Typical Operating Characteristics (continued)
4.5
4.4
4.3
4.2
4.1
4.0
3.9
3.8
RS-485 RECEIVER OUTPUT HIGH VOLTAGE
-60
-60
-60
RS-485 DRIVER PROPAGATION DELAY
OUTPUT VOLTAGE vs. TEMPERATURE
(115kbps MODE) vs. TEMPERATURE
-40
R
-40 -20
I
-40 -20
RO
RS-485 DRIVER DIFFERENTIAL
t
= 54
= 8mA
-20
vs. TEMPERATURE
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
0
20
20
20
40
40
40
60
60
R
60
t
= 54
80
80
80
100
100
100
0.01
140
135
130
125
120
115
920
880
840
800
760
720
680
640
600
560
520
100
0.1
10
1
-60
-60
RS-485 RECEIVER PROPAGATION DELAY
0
RS-485 DRIVER PROPAGATION DELAY
(500kbps MODE) vs. TEMPERATURE
(500kbps MODE) vs. TEMPERATURE
vs. DIFFERENTIAL OUTPUT VOLTAGE
RS-485 DRIVER OUTPUT CURRENT
C
R
-40 -20
-40 -20
LOAD
t
= 54
DIFFERENTIAL OUTPUT VOLTAGE (V)
1
= 100pF
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
2
20
20
3
40
40
60
60
4
80
80
100
100
5
9