Datasheet

SPI/MICROWIRE-Compatible UART and ±15kV ESD-
Protected RS-232 Transceivers with Internal Capacitors
0
10
5
15
30
35
40
25
20
50
0 1000 2000
250kbps
3000 4000 5000
RS-232 TRANSCEIVER SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX3110E/TOC09
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)
45
TRANSMITTER 1 AT DATA RATE
TRANSMITTER 2 AT DATA RATE
3kΩ + C
L
16
120kbps
20kbps
0
4
2
6
12
14
10
8
16
0 1000 2000 3000 4000 5000
RS-232 TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE
MAX3110E/TOC11
LOAD CAPACITANCE (pF)
SLEW RATE (V/μs)
TRANSMITTER 1 AT 250kbps
3kΩ + C
L
-SLEW
+SLEW
-10.0
-5.0
-7.5
-2.5
5.0
7.5
2.5
0
10.0
0 1000 2000 3000 4000 5000
RS-232 TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3110E/TOC07
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
TRANSMITTER 1 AT 250kbps
TRANSMITTER 2 AT 15.6kbps
3kΩ + C
L
V
OUT-
V
OUT+
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
1000
900
0
-40 -20 40 60 100
UART SUPPLY CURRENT vs. TEMPERATURE
200
100
800
700
MAX3110E-01
TEMPERATURE (°C)
SUPPLY CURRENT (μA)
020 80
600
500
400
300
MAX3110E, V
CC
= +5V
MAX3111E, V
CC
= +3.3V
1.8432MHz CRYSTAL
TRANSMITTING AT 115.2kbps
10
9
0
-40 -20 40 60 100
UART SHUTDOWN CURRENT
vs. TEMPERATURE
2
1
8
7
MAX3110E-02
TEMPERATURE (°C)
SHUTDOWN CURRENT (μA)
020 80
6
5
4
3
1.8432MHz CRYSTAL
MAX3110E, V
CC
= +5V
MAX3111E, V
CC
= +3.3V
400
50
100
10k
1000
100k 1M
UART SUPPLY CURRENT
vs. BAUD RATE
150
100
MAX3110E-03
BAUD RATE (bps)
SUPPLY CURRENT (μA)
200
250
350
300
1.8432MHz
CRYSTAL
MAX3110E
MAX3111E
+5V
STANDBY
+5V
TRANSMITTING
+3V
TRANSMITTING
+3V
STANDBY
700
600
0
01 3
4
5
UART SUPPLY CURRENT vs.
EXTERNAL CLOCK FREQUENCY
100
500
MAX3110E-04
EXTERNAL CLOCK FREQUENCY (MHz)
SUPPLY CURRENT (μA)
2
400
300
200
MAX3110E
V
CC
= +5V
MAX3111E
V
CC
= +3.3V
70
0
0 0.20.1 0.6 0.7
0.8
1.0
MAX3111E
TX, RTS, DOUT OUTPUT CURRENT
vs. OUTPUT LOW VOLTAGE (V
CC
= +3.3V)
10
MAX3110E-05
VOLTAGE (V)
OUTPUT SINK CURRENT (mA)
0.3 0.50.4 0.9
60
50
40
30
20
RTS
TX
DOUT
90
80
0
0 0.20.1 0.6 0.7
0.8
1.0
MAX3110E
TX, RTS, DOUT OUTPUT CURRENT
vs. OUTPUT LOW VOLTAGE (V
CC
= +5V)
10
70
MAX3110E-06
VOLTAGE (V)
OUTPUT SINK CURRENT (mA)
0.3 0.50.4 0.9
60
50
40
30
20
RTS
TX
DOUT
8
Maxim Integrated
MAX3110E/MAX3111E