
9
Maxim Integrated
High-ESD Profibus RS-485 Transceiver
MAX14770E
Typical Operating Characteristics
(VCC = +5V, TA = +25NC, unless otherwise noted.)
DIFFERENTIAL OUTPUT VOLTAGE VOD
vs. TEMPERATURE
MAX14770E
toc09
TEMPERATURE (°C)
DRIVER
DIFFERENTIAL
OUTPUT
VOLTAGE
(V)
110
95
-25 -10 5
35 50 65
20
80
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.0
-40
125
RL = 54
DIFFERENTIAL OUTPUT VOLTAGE VOD
vs. OUTPUT CURRENT
MAX14770E
toc08
OUTPUT CURRENT (mA)
DIFFERENTIAL
OUTPUT
VOLTAGE
(V)
60
40
20
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0
80
DRIVER PROPAGATION DELAY
vs. TEMPERATURE
MAX14770E
toc07
TEMPERATURE (°C)
DRIVER
PROPAGATION
DELAY
(ns)
110
95
80
65
50
35
20
5
-10
-25
5
10
15
20
25
0
-40
125
RL = 54, CL = 50pF
RECEIVER PROPAGATION DELAY
vs. TEMPERATURE
MAX14770E
toc06
TEMPERATURE (°C)
RECEIVER
PROPAGATION
DELAY
(ns)
110
95
80
65
50
35
20
5
-10
-25
5
10
15
20
25
0
-40
125
RECEIVER OUTPUT RO CURRENT
vs. OUTPUT HIGH VOLTAGE
MAX14770E
toc05
OUTPUT HIGH VOLTAGE (V)
OUTPUT
CURRENT
(mA)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
10
20
30
40
50
60
0
1.0
5.0
RECEIVER OUTPUT RO CURRENT
vs. OUTPUT LOW VOLTAGE
MAX14770E
toc04
OUTPUT LOW VOLTAGE (V)
OUTPUT
CURRENT
(mA)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
10
20
30
40
50
60
0
4.0
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX14770E
toc03
TEMPERATURE (°C)
SHUTDOWN
SUPPLY
CURRENT
(A)
110
95
80
65
50
35
20
5
-10
-25
0.5
1.0
1.5
2.0
2.5
3.0
0
-40
125
SUPPLY CURRENT
vs. DATA RATE
MAX14770E
toc02
DATA RATE (kbps)
SUPPLY
CURRENT
(mA)
15,000
10,000
5,000
5
10
15
20
25
30
35
40
45
50
55
60
0
20,000
PROFIBUS EQUIVALENT LOAD
NO LOAD
NO-LOAD DC SUPPLY CURRENT
vs. TEMPERATURE
MAX14770E
toc01
TEMPERATURE (°C)
NO-LOAD
SUPPLY
CURRENT
(mA)
110
95
80
65
50
35
20
5
-10
-25
0.5
1.0
1.5
2.0
2.5
0
-40
125
DE = VCC
DE = GND