Datasheet

MAX13234E–MAX13237E
3Mbps RS-232 Transceivers with
Low-Voltage Interface
_______________________________________________________________________________________ 7
Typical Operating Characteristics
(V
CC
= V
L
= 3.3V, T
A
= +25°C, unless otherwise noted.)
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX13234E toc01
LOAD CAPACITANCE (pF)
OUTPUT VOLTAGE (V)
500 20001000 1500
-4
-2
0
2
4
6
-6
0 2500
MAX13234E/MAX13236E
R
L
= 3k
Ω
T1 AT 250kbps
V+
V-
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX13234E toc02
LOAD CAPACITANCE (pF)
OUTPUT VOLTAGE (V)
100 250150 200
-4
-2
0
2
4
6
-6
50 300
MAX13235E/MAX13237E
R
L
= 3k
Ω
T1 AT 3Mbps
V+
V-
SLEW RATE vs. LOAD CAPACITANCE
MAX13234E toc03
LOAD CAPACITANCE (pF)
SLEW RATE (V/µs)
500 20001000 1500
6
7
8
10
5
9
11
12
4
0 2500
MAX13234E/MAX13236E
R
L
= 3kΩ
SR+
SR-
SLEW RATE vs. LOAD CAPACITANCE
MAX13234E toc04
LOAD CAPACITANCE (pF)
SLEW RATE (V/µs)
100 250150 200
50
55
60
70
45
65
75
40
50 300
MAX13235E/MAX13237E
R
L
= 3k
Ω
SR+
SR-
V
CC
SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX13234E toc05
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)
500 20001000 1500
10
15
25
5
20
30
0
0 2500
MAX13234ER
L
= 3k
Ω
T1 AT 250kbps
T2 AT 15.6kbps
V
CC
SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX13234E toc06
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)
100 250150 200
15
20
30
35
10
25
40
5
50 300
MAX13235ER
L
= 3k
Ω
T1 AT 3Mbps
T2 AT 187.5kbps
TRANSMITTER SKEW
vs. LOAD CAPACITANCE
MAX13234E toc07
LOAD CAPACITANCE (pF)
TRANSMITTER SKEW (ns)
500 20001000 1500
30
50
90
110
130
10
70
150
-10
0 2500
MAX13234E/MAX13236E
R
L
= 3k
Ω
1 TRANSMITTER
OPERATING AT 250kbps
TRANSMITTER SKEW
vs. LOAD CAPACITANCE
MAX13234E toc08
LOAD CAPACITANCE (pF)
TRANSMITTER SKEW (ns)
150 200100
3
4
6
7
8
2
1
5
9
0
50 250
MAX13235E/MAX13237E
R
L
= 3k
Ω
1 TRANSMITTER
OPERATING AT 3Mbps
READY TURN-ON TIME
vs. TEMPERATURE
MAX13234E toc09
TEMPERATURE (°C)
READY TURN-ON TIME (µs)
-15 6010 35
50
60
70
80
90
100
40
-40 85