Datasheet

3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232
Transceivers Using Four 0.1µF External Capacitors
6 Maxim Integrated
MAX3222/MAX3232/MAX3237/MAX3241
—
FUNCTION
—
MAX3222
Noninverting Complementary Receiver Outputs.
Always active.
DIP/SO SSOP
— 11, 14
1 1 Receiver Enable. Active low.
2 2
Positive Terminal of Voltage-Doubler Charge-Pump
Capacitor
6 6
Negative Terminal of Inverting Charge-Pump
Capacitor
5 5
Positive Terminal of Inverting Charge-Pump
Capacitor
4 4
Negative Terminal of Voltage-Doubler Charge-Pump
Capacitor
3 3 +5.5V Generated by the Charge Pump
11, 12 12, 13 TTL/CMOS Transmitter Inputs
10, 13 10, 15 TTL/CMOS Receiver Outputs
9, 14 9, 16 RS-232 Receiver Inputs
8, 15 8, 17 RS-232 Transmitter Outputs
7 7 -5.5V Generated by the Charge Pump
18 20 Shutdown Control. Active low.
17 19 +3.0V to +5.5V Supply Voltage
16 18 Ground
No Connection
MAX3237MAX3232
— 16
— 13
1 28
5 3
4 1
3 25
2 27
10, 11
17, 19, 22,
23, 24
9, 12 18, 20, 21
8, 13 8, 9, 11
7, 14
5, 6, 7,
10, 12
6 4
— 14
16 26
15 2
— —
NAME
EN
C1+
C2-
C2+
C1-
V+
T_IN
R_OUT
R_IN
T_OUT
V-
SHDN
V
CC
GND
R_OUTB
N.C.
MAX3241
20, 21
23
28
2
1
24
27
12, 13, 14
15–19
4–8
9, 10, 11
3
22
26
25
—
PIN
— —
MegaBaud Control Input. Connect to GND for normal
operation; connect to V
CC
for 1Mbps transmission rates.
— 15 MBAUD—
______________________________________________________________Pin Description