MAX202E–MAX213E,
MAX232E/MAX241E
±15kV ESD-Protected,
5V RS-232 Transceivers
Table 3. DB9 Cable Connections
Commonly Used for EIA/TIA-232E and
V.24 Asynchronous Interfaces
PIN
CONNECTION
Received Line Signal
Detector (sometimes
called Carrier Detect,
DCD)
Receive Data (RD)
Transmit Data (TD)
Data Terminal Ready
Signal Ground
Data Set Ready (DSR)
Request to Send (RTS)
Clear to Send (CTS)
Ring Indicator
1
Handshake from DCE
2
3
4
5
6
7
8
9
Data from DCE
Data from DTE
Handshake from DTE
Reference point for sig-
nals
Handshake from DCE
Handshake from DTE
Handshake from DCE
Handshake from DCE
Pin Configurations and Typical Operating Circuits (continued)
TOP VIEW
+5V INPUT
0.1μF
16
V
CC
0.1μF*
6.3V
2
+10V
-10V
0.1μF*
16V
1
0.1μF*
6.3V
C1+ 1
V+ 2
C1- 3
C2+ 4
C2- 5
V- 6
T2OUT 7
R2IN 8
16 V
CC
15 GND
14 T1OUT
11
TTL/CMOS
INPUTS
10
0.1μF*
16V
3
4
5
C1+
V+
+5V TO +10V
VOLTAGE DOUBLER
C1-
C2+
+10V TO -10V
C2- VOLTAGE INVERTER
V-
6
MAX202E
MAX232E
13 R1IN
12 R1OUT
11 T1IN
10 T2IN
9
R2OUT
TTL/CMOS
OUTPUTS
T1IN
T1
T1OUT 14
RS-232
OUTPUTS
T2IN
T2
T2OUT
7
12
R1OUT
R1
5kΩ
R1IN 13
RS-232
INPUTS
DIP/SO/TSSOP
9
R2OUT
R2
5kΩ
R2IN
8
PIN NUMBERS ON TYPICAL OPERATING CIRCUIT REFER TO DIP/SO/TSSOP PACKAGE, NOT LCC.
* 1.0μF CAPACITORS, MAX232E ONLY.
GND
15
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