1µA Supply Current, 1Mbps, 3.0V to 5.5V,
RS-232 Transceivers with AutoShutdown Plus
__________________________________________Typical Operating Characteristics
(V
CC
= +3.3V, 250kbps data rate, C1–C4 = 0.1µF, all transmitters loaded with 3kΩ and C
L
, T
A
= +25°C, unless otherwise noted.)
MAX3224/MAX3226
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
0
MAX3224-01
MAX3224–MAX3227/MAX3244/MAX3245
†
MAX3224/MAX3226
SLEW RATE vs. LOAD CAPACITANCE
MAX3224-02
MAX3224/MAX3226
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
40
SUPPLY CURRENT (mA)
35
30
25
20
15
10
20kbps
250kbps
120kbps
MAX3224-03
16
14
12
SLEW RATE (Vμ/s)
10
8
6
4
+SLEW
-SLEW
45
TRANSMITTER OUTPUT VOLTAGE (V)
V
OUT+
T1 TRANSMITTING AT 250kbps
T2 (MAX3224) TRANSMITTING AT 15.6kbps
V
OUT-
1000
2000
3000
4000
5000
2
FOR DATA RATES UP TO 250kbps
0
0
1000
2000
3000
4000
5000
5
0
0
T1 TRANSMITTING AT 250kbps
T2 (MAX3224) TRANSMITTING AT 15.6kbps
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
MAX3225/MAX3227
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3224-04
MAX3225/MAX3227
SLEW RATE vs. LOAD CAPACITANCE
MAX3224-05
MAX3225/MAX3227
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
90
80
SUPPLY CURRENT (mA)
70
60
50
40
30
20
1Mbps
1 TRANSMITTER AT FULL DATA RATE
1 TRANSMITTER AT 1/16 DATA RATE
(MAX3225)
LOAD = 3kΩ + C
L
2Mbps
1.5Mbps
MAX3224-06
7.5
TRANSMITTER OUTPUT VOLTAGE (V)
5.0
2Mbps
2.5
0
-2.5
-5.0
-7.5
0
500
1000
1500
2000
1.5Mbps
1Mbps
80
70
60
SLEW RATE (V/μs)
-SLEW
50
+SLEW
40
30
20
10
0
1 TRANSMITTER AT 1Mbps
1 TRANSMITTER AT 62.5kbps (MAX3225)
0
500
1000
1500
2000
100
1 TRANSMITTER AT FULL DATA RATE
1 TRANSMITTER AT 1/16 DATA RATE
(MAX3225)
LOAD = 3kΩ + C
L
1.5Mbps 1Mbps
2Mbps
10
0
2500
0
500
1000
1500
2000
2500
2500
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
MAX3225/MAX3227
TRANSMITTER SKEW vs.
LOAD CAPACITANCE
MAX3224-07
MAX3224–MAX3227
READY TURN-ON TIME
vs. TEMPERATURE
MAX3224-08
MAX3224–MAX3227
READY TURN-OFF TIME
vs. TEMPERATURE
180
READY TURN-OFF TIME (ns)
160
140
120
100
80
60
40
20
0
MAX3224-09
50
45
40
TRANSMITTER SKEW (ns)
35
30
25
20
15
10
5
0
0
500
1000
1500
2000
2500
AVERAGE; 10 PARTS
1 TRANSMITTER AT 512kbps
1 TRANSMITTER AT 30kbps
(MAX3225)
LOAD = 3kΩ + C
L
38
36
READY TURN-ON TIME (μs)
34
32
30
28
26
24
22
20
200
3000
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
LOAD CAPACITANCE (pF)
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
