3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232
Transceivers Using Four 0.1µF External Capacitors
MAX3222/MAX3232/MAX3237/MAX3241
______________________________________________________________Pin Description
PIN
MAX3222
MAX3232
DIP/SO
1
2
3
4
5
6
7
8, 15
9, 14
10, 13
11, 12
16
17
18
—
—
—
SSOP
1
2
3
4
5
6
7
8, 17
9, 16
10, 15
12, 13
18
19
20
11, 14
—
—
—
1
2
3
4
5
6
7, 14
8, 13
9, 12
10, 11
15
16
—
—
—
—
13
28
27
25
1
3
4
5, 6, 7,
10, 12
8, 9, 11
18, 20, 21
17, 19, 22,
23, 24
2
26
14
—
15
16
23
28
27
24
1
2
3
9, 10, 11
4–8
15–19
12, 13, 14
25
26
22
—
—
20, 21
EN
C1+
V+
C1-
C2+
C2-
V-
T_OUT
R_IN
R_OUT
T_IN
GND
V
CC
SHDN
N.C.
MBAUD
R_OUTB
Receiver Enable. Active low.
Positive Terminal of Voltage-Doubler Charge-Pump
Capacitor
+5.5V Generated by the Charge Pump
Negative Terminal of Voltage-Doubler Charge-Pump
Capacitor
Positive Terminal of Inverting Charge-Pump
Capacitor
Negative Terminal of Inverting Charge-Pump
Capacitor
-5.5V Generated by the Charge Pump
RS-232 Transmitter Outputs
RS-232 Receiver Inputs
TTL/CMOS Receiver Outputs
TTL/CMOS Transmitter Inputs
Ground
+3.0V to +5.5V Supply Voltage
Shutdown Control. Active low.
No Connection
MegaBaud Control Input. Connect to GND for normal
operation; connect to V
CC
for 1Mbps transmission rates.
Noninverting Complementary Receiver Outputs.
Always active.
MAX3237
MAX3241
NAME
FUNCTION
6
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
