Datasheet

MAX3480A/MAX3480B
Complete, Isolated, 3.3V
RS-485/RS-422 Data Interface
6 _______________________________________________________________________________________
____________________________Typical Operating Characteristics (continued)
(V
CC_
= 3.3V, T
A
= +25°C, unless otherwise noted.)
0.1
10
1
100
DRIVER ENABLE TIME
vs. TEMPERATURE
MAX3480A/B-10
TEMPERATURE (°C)
DRIVER ENABLE TIME (µs)
-40 -20 0 20 40 60 80
MAX3480A
MAX3480B
R
L
= 54Ω, DI´ = 0V MEASURED FROM
DE
´ TO VALID OUTPUT
350
0
MAX3480A 
SUPPLY CURRENT vs. SUPPLY VOLTAGE
300
250
MAX3480A-11
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
100
150
50
3.0 3.2 3.4 3.6 3.8
200


DE´ HIGH, 50Ω LOAD
DE
´ HIGH, 100Ω LOAD
DE
´ LOW, DI´ LOW
DE
´ LOW, DI´ HIGH
300
0
MAX3480B 
SUPPLY CURRENT vs. SUPPLY VOLTAGE
200
250
MAX3480B-12
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
100
50
3.0 3.2 3.63.4 3.8
150
DE´ HIGH,
100Ω LOAD
DE´ HIGH, 50Ω LOAD
DE
´ LOW, DI´ LOW
DE
´ LOW, DI´ HIGH
MAX3480B DRIVER INPUT (AB)
AND RECEIVER OUTPUT (RO)
CIRCUIT OF FIGURE 2, TERMINATION: 100Ω
DE
´ INPUT,
2V/div

A
B
RO, 
74HC240, 


2V/div
1µs/div

DI,
2V/div
MAX3480A DRIVER INPUT (AB)
AND RECEIVER OUTPUT (RO)
CIRCUIT OF FIGURE 2, TERMINATION: 100Ω
100ns/div
DE
´ INPUT,
2V/div

A
B
RO, 
74HC240, 
DI, 
2V/div

2V/div

MAX3480A DRIVER ENABLE (AB) 
AND RECEIVER OUTPUT (RO)
CIRCUIT OF FIGURE 2, TERMINATION: 100Ω
DE
´ INPUT,
1V/div
A, 1V/div
B, 2V/div
100ns/div
MAX3480B DRIVER ENABLE (AB) 
AND RECEIVER OUTPUT (RO)
CIRCUIT OF FIGURE 2, TERMINATION: 100Ω
DE´ INPUT,
1V/div
A, 1V/div
B, 2V/div
25µs/div
0.1
10
1
100
DRIVER DISABLE TIME
vs. TEMPERATURE
MAX3480A/B-9
TEMPERATURE (°C)
DRIVER DISABLE TIME (µs)
-40 -20 0 20 40 60 80
MAX3480A
MAX3480B
R
L
= 54Ω, DI´ = 0V MEASURED FROM
DE
´ TO VALID OUTPUT
