HIN236CP Intersil, HIN236CP Datasheet - Page 12

• Manufacturer Part Number: HIN236CP
• Description: RS232 5V 4D/3R 1UF CAPS 24PDIP
• Manufacturer: Intersil

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.
FIGURE 10. COMBINING TWO HIN232s FOR 4 PAIRS OF RS-232 INPUTS AND OUTPUTS
HIN232, HIN236, HIN237, HIN238, HIN239, HIN240, HIN241
INPUTS AND
INPUTS AND
TTL/CMOS
TTL/CMOS
OUTPUTS
OUTPUTS
12
1µF
1µF
DSRS
C1
C1
DCD
DTR
RTS
CTS
RD
TD
2µF
R1
C4
+
+
-
-
-
11
10
12
11
10
12
1
3
9
1
3
9
R2
R2
6
6
HIN232
HIN232
15
V- V+
T1
T1
R1
R1
T2
T2
2
2
14
13
15
16
16
14
13
7
8
4
7
8
4
5
5
2µF
C3
-
-
+
TD (2) TRANSMIT DATA
RTS (4) REQUEST TO SEND
RD (3) RECEIVE DATA
CTS (5) CLEAR TO SEND
+
DTR (20) DATA TERMINAL READY
DSRS (24) DATA SIGNALING RATE SELECT
DCD (8) DATA CARRIER DETECT
R1 (22) RING INDICATOR
SIGNAL GROUND (7)
C2
1µF
C2
1µF
-
INPUTS AND
TTL/CMOS
OUTPUTS
FIGURE 9. SIMPLE DUPLEX RS-232 PORT WITH CTS/RTS
+5V
1µF
1µF
C1
C2
+5V
CTS
RS-232
INPUTS AND OUTPUTS
RTS
RD
TD
HANDSHAKING
+
+
-
-
11
10
12
1
3
4
5
9
R2
HIN232
15
T1
16
R1
T2
14
13
6
7
8
2
+
-
+
-
TD (2) TRANSMIT DATA
RTS (4) REQUEST TO SEND
RD (3) RECEIVE DATA
CTS (5) CLEAR TO SEND
SIGNAL GROUND (7)
RS-232
INPUTS AND OUTPUTS
DTR (20) DATA
TERMINAL READY
DSRS (24) DATA
SIGNALING RATE
SELECT