1ꢀ5k EꢁD-ꢂrotected, +ꢀk Rꢁ-232 Transceivers
_____________________________________________________________ꢂin Descriptions
MAX202E/MAX232E
PIN
NAME
FUNCTION
DIP/SO/TSSOP
LCC
2, 4
1, 3
C1+, C1-
V+
Terminals for positive charge-pump capacitor
2
3
+2V
voltage generated by the charge pump
CC
4, ꢀ
6
ꢀ, 7
8
C2+, C2-
V-
Terminals for negative charge-pump capacitor
-2V voltage generated by the charge pump
CC
7, 14
8, 13
9, 12
10, 11
1ꢀ
9, 18
10, 17
12, 1ꢀ
13, 14
19
T_OUT
R_IN
R_OUT
T_IN
RS-232 Driver Outputs
RS-232 Receiver Outputs
RS-232 Receiver Outputs
RS-232 Driver Inputs
GND
Ground
16
__
20
V
+4.ꢀV to +ꢀ.ꢀV Supply-Voltage Input
No Connect—not internally connected.
CC
1, 6, 11, 16
N.C.
MAX203E
PIN
NAME
FUNCTION
DIP
1, 2
3, 20
4,19
ꢀ,18
6, 9
7
SO
1, 2
3, 20
4, 19
ꢀ, 18
6, 9
7
T_IN
R_OUT
R_IN
T_OUT
GND
RS-232 Driver Inputs
RS-232 Receiver Outputs
RS-232 Receiver Inputs
RS-232 Transmitter Outputs
Ground
V
+4.ꢀV to +ꢀ.ꢀV Supply-Voltage Input
Ma5e no connection to this pin.
Connect pins together.
voltage generated by the charge pump. Connect pins together.
Ma5e no connection to this pin.
+2V voltage generated by the charge pump
CC
8
13
C1+
C2-
V-
C1-
V+
10, 16
12, 17
13
11, 16
10, 17
14
-2V
CC
14
8
CC
11, 1ꢀ
12, 1ꢀ
C2+
Connect pins together.
MAX205E
PIN
NAME
T_OUT
R_IN
FUNCTION
1–4, 19
RS-232 Driver Outputs
RS-232 Receiver Inputs
ꢀ, 10, 13, 18, 24
6, 9, 14, 17, 23
R_OUT
T_IN
TTL/CMOS Receiver Outputs. All receivers are inactive in shutdown.
7, 8, 1ꢀ, 16, 22
TTL/CMOS Driver Inputs. Internal pull-ups to V
.
CC
11
12
20
21
GND
Ground
V
+4.7ꢀV to +ꢀ.2ꢀV Supply Voltage
Receiver Enable—active low
Shutdown Control—active high
CC
EN
SHDN
6
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
