1ꢀ5k EꢁD-ꢂrotected, +ꢀk Rꢁ-232 Transceivers
Table 3. DB9 Cable Connections
Commonly Used for EIA/TIAE-232E and
V.24 Asynchronous Interfaces
PIN
CONNECTION
Received Line Signal
Detector (sometimes
called Carrier Detect,
DCD)
1
Handsha5e from DCE
2
3
4
Receive Data (RD)
Transmit Data (TD)
Data Terminal Ready
Data from DCE
Data from DTE
Handsha5e from DTE
Reference point for
signals
ꢀ
Signal Ground
6
7
8
9
Data Set Ready (DSR)
Request to Send (RTS)
Clear to Send (CTS)
Ring Indicator
Handsha5e from DCE
Handsha5e from DTE
Handsha5e from DCE
Handsha5e from DCE
____________ꢂin Configurations and Typical Operating Circuits (continued)
+5V INPUT
TOP VIEW
0.1µF*
6.3V
0.1µF
16
V
CC
1
2
6
+10V
-10V
C1+
V+
V-
0.1µF*
6.3V
+5V TO +10V
VOLTAGE DOUBLER
3
4
C1-
C2+
C1+
+10V TO -10V
VOLTAGE INVERTER
V
0.1µF*
1
2
3
4
5
6
7
8
CC
0.1µF*
16V
16
15
14
13
12
11
10
9
5
C2-
16V
GND
V+
C1-
T1OUT
R1IN
11
14
T1IN
T1OUT
T1
T2
C2+
C2-
MAX202E
MAX232E
TTL/CMOS
INPUTS
RS-232
OUTPUTS
R1OUT
T1IN
T2IN
T2OUT
R1IN
7
V-
10
12
T2OUT
R2IN
T2IN
R1OUT
13
R2OUT
R1
R2
TTL/CMOS
OUTPUTS
RS-232
INPUTS
5k
5k
DIP/SO/TSSOP
R2IN
9
R2OUT
8
GND
15
PIN NUMBERS ON TYPICAL OPERATING CIRCUIT REFER TO DIP/SO/TSSOP PACKAGE, NOT LCC.
* 1.0µF CAPACITORS, MAX232E ONLY.
14 ______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
