Datasheet

MAX3140
SPI/MICROWIRE-Compatible UART with Integrated
True Fail-Safe RS-485/RS-422 Transceivers
10 ______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
CC
= +5V, T
A
= +25°C, unless otherwise noted.)
0
20
40
60
80
100
120
140
OUTPUT CURRENT vs.
RS-485 DRIVER OUTPUT LOW VOLTAGE
MAX3140-19
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
024681012
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-8 -2
OUTPUT CURRENT vs.
RS-485 DRIVER OUTPUT HIGH VOLTAGE
MAX3140-20
OUTPUT HIGH VOLTAGE (V)
OUTPUT CURRENT (mA)
642-6 -4 0
50ns/div
V
A
- V
B
(2V/div)
RO
(5V/div)
MAX3140-21
RS-485 RECEIVER PROPAGATION DELAY
(SRL = GND)
50ns/div
V
A
- V
B
(2V/div)
RO
(5V/div)
MAX3140-22
RS-485 RECEIVER PROPAGATION DELAY
(SRL = OPEN OR V
CC
)
2μs/div
RS-485 DRIVER PROPAGATION DELAY
(SRL = OPEN)
DI
(5V/div)
V
Y
- V
Z
(2.5V/div)
MAX3140-23
500ns/div
RS-485 DRIVER PROPAGATION DELAY
(SRL = V
CC
)
DI
(5V/div)
V
Y
- V
Z
(2.5V/div)
MAX3140-24
50ns/div
RS-485 DRIVER PROPAGATION DELAY
(SRL = GND)
DI
(5V/div)
V
Y
- V
Z
(2.5V/div)
MAX3140-25