HIN232 Intersil Corporation, HIN232 Datasheet - Page 10

• Manufacturer Part Number: HIN232
• Description: +5V Powered RS-232 Transmitters/Receivers
• Manufacturer: Intersil Corporation

Test Circuits (HIN232)
Applications
The HIN2XX may be used for all RS-232 data terminal and
communication links. It is particularly useful in applications
where ±12V power supplies are not available for
conventional RS-232 interface circuits. The applications
presented represent typical interface configurations.
A simple duplex RS-232 port with CTS/RTS handshaking is
illustrated in Figure 9. Fixed output signals such as DTR
(data terminal ready) and DSRS (data signaling rate select)
is generated by driving them through a 5kΩ resistor
connected to V+.
In applications requiring four RS-232 inputs and outputs
(Figure 10), note that each circuit requires two charge pump
capacitors (C1 and C2) but can share common reservoir
capacitors (C3 and C4). The benefit of sharing common
reservoir capacitors is the elimination of two capacitors and
the reduction of the charge pump source impedance which
effectively increases the output swing of the transmitters.
±30V INPUT
3kΩ
RS-232
1µF
OUTPUT
C1
1µF
1µF
T2
C2
C3
FIGURE 7. GENERAL TEST CIRCUIT
+
1µF C4
+
-
-
+
+
-
-
1
2
3
4
5
6
7
8
C1+
V+
C1-
C2+
C2-
V-
T2
R2
OUT
IN
10
R1
R2
T1
GND
R1
T1
T2
V
OUT
OUT
OUT
CC
IN
IN
IN
16
15
14
13
12
11
10
9
RS-232 ±30V INPUT
TTL/CMOS OUTPUT
TTL/CMOS INPUT
TTL/CMOS INPUT
TTL/CMOS OUTPUT
+5.5V INPUT
+4.5V TO
T1 OUTPUT
3kΩ
INPUTS AND
TTL/CMOS
OUTPUTS
FIGURE 8. POWER-OFF SOURCE RESISTANCE
FIGURE 9. SIMPLE DUPLEX RS-232 PORT WITH CTS/RTS
1µF
1µF
C1
C2
+5V
CTS
RTS
RD
TD
CONFIGURATION
HANDSHAKING
+
+
-
-
11
10
12
1
3
4
5
9
R
R2
OUT
V
1
2
3
4
5
6
7
8
HIN232
15
IN
T1
C1+
V+
C1-
C2+
C2-
V-
T2
R2
16
= ±2V
= V
R1
OUT
IN
T2
IN
/1
T2
R1
R2
T1
14
13
6
7
8
GND
R1
T1
T2
OUT
V
2
OUT
OUT
OUT
+
CC
-
T1
+
-
A
IN
IN
IN
TD (2) TRANSMIT DATA
RTS (4) REQUEST TO SEND
RD (3) RECEIVE DATA
CTS (5) CLEAR TO SEND
SIGNAL GROUND (7)
OUT
16
15
14
13
12
11
10
9
RS-232
INPUTS AND OUTPUTS
DTR (20) DATA
TERMINAL READY
DSRS (24) DATA
SIGNALING RATE
SELECT