MAX3243E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ±15-kV IEC ESD PROTECTION
www.ti.com
SLLS657A–APRIL 2005–REVISED JUNE 2005
APPLICATION INFORMATION
28
C1+
V+
27
26
1
2
C2+
C2−
+
−
+
−
†
C3
C2
+
−
C1
V
CC
+
−
C
BYPASS
= 0.1 µF
3
25
24
23
V−
GND
C1−
−
+
C4
4
5
6
7
8
RIN1
RIN2
RIN3
FORCEON
FORCEOFF
22
RS-232 Inputs
RIN4
RIN5
21
20
INVALID
ROUT2B
9
DOUT1
DOUT2
19
18
17
10
ROUT1
ROUT2
RS-232 Outputs
5 kΩ
11
DOUT3
5 kΩ
Logic Outputs
12
13
14
DIN3
DIN2
DIN1
ROUT3
5 kΩ
16
15
Logic Inputs
ROUT4
ROUT5
5 kΩ
5 kΩ
†
C3 can be connected to V or GND.
CC
NOTES: A. Resistor values shown are nominal.
B. Nonpolarizedceramic capacitors are acceptable. If polarized tantalum or
electrolytic capacitors are used, they should be connected as shown.
V
CC
vs CAPACITOR VALUES
V
CC
C1
C2, C3, and C4
3.3 V ± 0.3 V
5 V ± 0.5 V
3 V to 5.5 V
0.1 µF
0.047 µF
0.1 µF
0.1 µF
0.33 µF
0.47 µF
Figure 6. Typical Operating Circuit and Capacitor Values
12
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