Datasheet

MAX3187
±15kV ESD-Protected, EMC-Compliant, 230kbps,
Dual RS-232 Serial Port for Motherboards/Desktops
4 _______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
(V
CC
= +5V, V
DD
= +12V, V
SS
= -12V, T
A
= +25°C, unless otherwise noted.)
40
-40
SUPPLY CURRENT
vs. LOAD CAPACITANCE
20
MAX3187/TOC-01
SUPPLY CURRENT (mA)
0 1000 3000
LOAD CAPACITANCE (pF)
2000 4000 5000
0
-20
30
10
-10
-30
I
DD
, 240kbps
I
DD
, 20kbps
I
SS
, 20kbps
I
SS
, 120kbps
I
SS
, 240kbps
I
CC
I
DD
, 120kbps
2 TRANSMITTERS AT DATA RATE
4 TRANSMITTERS AT DATA RATE/16
3kΩ + C
LOAD
40
-40
10.8
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
20
MAX3187/TOC-02
SUPPLY VOLTAGE (±V)
SUPPLY CURRENT (mA)
12.011.4 12.6 13.2
0
-20
30
10
-10
-30
I
DD
, 240kbps
I
DD
, 20kbps
I
SS,
20kbps
I
SS,
120kbps
I
SS,
240kbps
I
CC
I
DD
, 120kbps
4 TRANSMITTERS AT DATA RATE/16
3kΩ + C
LOAD
V
CC
= 5V
2 TRANSMITTERS AT DATA RATE
16
0
0 1000 3000
SLEW RATE
vs. LOAD CAPACITANCE
12
MAX3187/TOC-03
LOAD CAPACITANCE (pF)
SLEW RATE (V/µs)
2000 4000 5000
8
4
14
10
6
2
2 TRANSMITTERS AT DATA RATE
4 TRANSMITTERS AT DATA RATE/16
3kΩ + C
LOAD
RISE
FALL
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3187/TOC-04
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
12.5
10.0
7.5
5.0
2.5
0
-2.5
-5.0
-7.5
-10.0
-12.5
4000 50003000200010000
240kbps
120kbps
120kbps
240kbps
2 TRANSMITTER, 240kbps
4 TRANSMITTERS, 15kbps
3kΩ + C
LOAD
TRANSMITTER OUTPUT VOLTAGE vs.
LOAD CURRENT PER TRANSMITTER
MAX3187/TOC-05
LOAD CURRENT PER TRANSMITTER (mA)
TRANSMITTER OUTPUT VOLTAGE (V)
15
10
5
0
-5
-10
-15
10 12 14 16 186 82 4
0
V
OUT+
V
OUT-
T1
V
CC
V
OUT+
V
OUT-
T2
T3
SLEW RATE
vs. TEMPERATURE
MAX3187/TOC-06
TEMPERATURE (°C)
SLEW RATE (V/ms)
25
20
15
10
5
0
85 105 12545 655 25-35 -15-55
RISE, 500pF
FALL, 500pF
RISE, 2000pF
FALL, 2000pF