HIN231BY View Datasheet(PDF) - Harris Semiconductor
Part Name
Description
Manufacturer
HIN231BY Datasheet PDF : 14 Pages
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HIN230 thru HIN241
Applications
The HINXXX 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 conven-
tional 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 res-
ervoir 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.
+5V
1
C1 +
1µF - 3
4
C2 +
1µF - 5
16
HIN232
11 T1
TD
T2
INPUTS
10
RTS
OUTPUTS
12
TTL/CMOS RD
CTS 9 R2
R1
-
+
CTR (20) DATA
TERMINAL READY
DSRS (24) DATA
SIGNALING RATE
6
-
SELECT
+ RS-232
INPUTS AND OUTPUTS
14
TD (2) TRANSMIT DATA
7 RTS (4) REQUEST TO SEND
13
RD (3) RECEIVE DATA
8 CTS (5) CLEAR TO SEND
15
SIGNAL GROUND (7)
FIGURE 9. SIMPLE DUPLEX RS-232 PORT WITH CTS/RTS
HANDSHAKING
INPUTS
OUTPUTS
TTL/CMOS
1
C1 +
1µF - 3
HIN232
11
TD
10
RTS
T1
T2
12
RD
CTS 9 R2
R1
4
+ C2
5 - 1µF
14
TD (2) TRANSMIT DATA
7 RTS (4) REQUEST TO SEND
13
RD (3) RECEIVE DATA
8 CTS (5) CLEAR TO SEND
15
C4 -
2µF
6
2
V- V+
6
2
16
C3 -
2µF
16
+5V
RS-232
INPUTS AND OUTPUTS
INPUTS
OUTPUTS
TTL/CMOS
HIN232
1
C1 +
1µF - 3
11
DTR
10
DSRS
T1
T2
12
DCD
R1 9 R2
R1
4
+ C2
5 - 1µF
14
DTR (20) DATA TERMINAL READY
7 DSRS (24) DATA SIGNALING RATE SELECT
13
DCD (8) DATA CARRIER DETECT
8 R1 (22) RING INDICATOR
15
SIGNAL GROUND (7)
FIGURE 10. COMBINING TWO HIN232s FOR 4 PAIRS OF RS-232 INPUTS AND OUTPUTS
8-40
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