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3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH
±15-kV
IEC ESD PROTECTION
SLLS664A – AUGUST 2005 – REVISED APRIL 2007
APPLICATION INFORMATION
1
V
CC
16
+ C
BYPASS
− = 0.1µF
2
C3
†
C1+
+
C1
−
+
−
V+
GND
15
3
14
C1−
13
C2+
5 kΩ
DOUT1
4
+
C2
−
RIN1
5 C2−
12
6
C4
DOUT2
−
+
7
10
DIN2
V−
11
ROUT1
DIN1
RIN2
8
5 kΩ
9
ROUT2
†
C3 can be connected to V
CC
or GND.
NOTES: A. Resistor values shown are nominal.
B. Nonpolarized ceramic capacitors are acceptable. If polarized tantalum or electrolytic capacitors are used, they should be
connected as shown.
V
CC
vs CAPACITOR VALUES
V
CC
3.3 V
±
0.3 V
5 V
±
0.5 V
3 V to 5.5 V
C1
0.1
µF
0.047
µF
0.1
µF
C2, C3, C4
0.1
µF
0.33
µF
0.47
µF
Figure 4. Typical Operating Circuit and Capacitor Values
7