±15kV ESD-Prote c te d, EMC-Com plia nt, 230kbps
RS-232 Se ria l Port for Mothe rboa rds /De s ktop PCs
__________________________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(V = +5.0V, V = +12.0V, V = -12.0V, T = +25°C, unless otherwise noted.)
CC
DD
SS
A
SUPPLY CURRENT
SUPPLY CURRENT
SLEW RATE
vs. SUPPLY VOLTAGE
vs. LOAD CAPACITANCE
vs. LOAD CAPACITANCE
25
20
15
10
5
16
14
20
15
10
I
, 240kbps
DD
MAX3185
I
, 240kbps
, 120kbps
DD
I
DD
, 120kbps
I
DD
12
10
8
I
DD
, 20kbps 1 TRANSMITTER AT DATA RATE
FALL
RISE
I
DD
, 20kbps
5
0
2 TRANSMITTERS AT DATA RATE / 16
I
CC
I
1 TRANSMITTER AT DATA RATE
CC
0
I
,
SS
20kbps 2 TRANSMITTERS AT DATA RATE / 16
3kΩ + 2500pF LOAD
I
SS
, 20kbps
-5
-5
6
I
SS
, 120kbps
I
, 120kbps
-10
-15
-20
-25
SS
3kΩ + C LOAD
L
1 TRANSMITTER 240kbps
2 TRANSMITTERS 15kbps
3kΩ + C LOAD
-10
-15
-20
4
I
SS
, 240kbps
I
, 240kbps
SS
L
2
0
10.8
11.4
12.0
12.6
13.2
0
1000
2000
3000
4000 5000
0
1000
2000
3000
4000 5000
SUPPLY VOLTAGE (V)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
SLEW RATE
vs. TEMPERATURE
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3185 TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CURRENT PER TRANSMITTER
15
25
12.5
120kbps
240kbps
10.0
7.5
10
5
20
15
VOUT+
VOUT-
5.0
1 TRANSMITTER AT DATA RATE
2 TRANSMITTERS AT DATA RATE / 16
FALL, 500pF
T1
T2
T3
2.5
V
3kΩ + C LOAD
OUT+
L
0
RISE, 500pF
0
-2.5
-5.0
-7.5
-10.0
-12.5
10
V
-5
-10
-15
CC
V
OUT-
240kbps
120kbps
RISE, 2000pF
5
0
FALL, 2000pF
-55 -35 -15
5
25 45 65 85 105 125
0
1000
2000
3000
4000 5000
0
2
4
6
8
10 12 14 16 18
TEMPERATURE (°C)
LOAD CAPACITANCE (pF)
LOAD CURRENT PER TRANSMITTER (mA)
4
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
