Datasheet

MAX3157
High CMRR RS-485 Transceiver
with ±50V Isolation
6 _______________________________________________________________________________________
1.80
1.84
1.82
1.90
1.88
1.86
1.92
1.94
1.96
1.98
-40 0-20 20 40 60 80
DRIVER DIFFERENTIAL OUTPUT
VOLTAGE vs. TEMPERATURE
MAX3157toc10
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
R
L
= 54Ω
410
420
450
440
430
460
470
480
490
-40 0-20 20 40 60 80
RECEIVER PROPAGATION DELAY
vs. TEMPERATURE
MAX3157toc11
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
1.32
1.34
1.36
1.42
1.44
1.40
1.38
1.46
1.48
1.50
1.52
-40 0-20 20 40 60 80
DRIVER PROPAGATION DELAY
vs. TEMPERATURE
MAX3157toc12
TEMPERATURE (°C)
PROPAGATION DELAY (µs)
R
L
= 54Ω
1.300
1.350
1.325
1.400
1.375
1.475
1.450
1.425
1.500
-40 0-20 20 40 60 80 100
DRIVER ENABLE TIME
vs. TEMPERATURE
MAX3157toc13
TEMPERATURE (°C)
DRIVER ENABLE TIME (µs)
0
50
100
200
150
250
-40 0-20 20 40 60 80 100
DRIVER DISABLE TIME
vs. TEMPERATURE
MAX3157toc14
TEMPERATURE (°C)
DRIVER DISABLE TIME (ns)
0
V
A
- V
B
5V/div
R
O
0
RECEIVER PROPAGATION DELAY
MAX3157toc15
2µs/div
0
DI
2V/div
VY - VZ
0
DRIVER PROPAGATION DELAY
MAX3157toc16
2µs/div
R
DIFF
= 54Ω
CL1 = CL2 = 100pF
POWER-UP DELAY
(V
ISOCOM
= 0)
MAX3157toc17
40µs/div
DE
10V/div
VY
5V/div
DE
5V/div
VY
10V/div
100µs/div
0
-50V
POWER-UP DELAY
(V
ISOCOM
= -50V)
MAX3157toc18
Typical Operating Characteristics (continued)
(V
CC
= +5V, YR = ZR = AR = BR = ISOCOM, C1 = C2 = 0.047µF, C3 = 1µF, C4 = 10nF, T
A
= +25°C, unless otherwise noted.)