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HIN232 Datasheet(PDF) 13 Page - Renesas Technology Corp |
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HIN232 Datasheet(HTML) 13 Page - Renesas Technology Corp |
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13 / 22 page ![]() HIN232, HIN236, HIN237, HIN238, HIN239, HIN240, HIN241 FN3138 Rev 17.00 Page 13 of 22 August 6, 2015 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 5k 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. - + - + - + DTR (20) DATA TERMINAL READY DSRS (24) DATA SIGNALING RATE RS-232 INPUTS AND OUTPUTS TD (2) TRANSMIT DATA RTS (4) REQUEST TO SEND RD (3) RECEIVE DATA CTS (5) CLEAR TO SEND SIGNAL GROUND (7) 15 8 13 7 14 16 - + 6 R2 R1 T2 T1 9 12 10 11 4 5 3 1 HIN232 C1 1µF C2 1µF TD RTS RD CTS SELECT +5V INPUTS AND OUTPUTS TTL/CMOS FIGURE 9. SIMPLE DUPLEX RS-232 PORT WITH CTS/RTS HANDSHAKING 2 FIGURE 10. COMBINING TWO HIN232s FOR 4 PAIRS OF RS-232 INPUTS AND OUTPUTS - + RS-232 INPUTS AND OUTPUTS DTR (20) DATA TERMINAL READY DSRS (24) DATA SIGNALING RATE SELECT DCD (8) DATA CARRIER DETECT R1 (22) RING INDICATOR SIGNAL GROUND (7) 15 8 13 7 14 2 - 4 R2 R1 T2 T1 9 12 10 11 3 1 HIN232 C1 1µF DTR DSRS DCD R1 +5V INPUTS AND OUTPUTS TTL/CMOS - + - + TD (2) TRANSMIT DATA RTS (4) REQUEST TO SEND RD (3) RECEIVE DATA CTS (5) CLEAR TO SEND 8 13 7 14 15 R2 R1 T2 T1 9 12 10 11 4 5 3 1 HIN232 C1 1µF C2 1µF TD RTS RD CTS INPUTS AND OUTPUTS TTL/CMOS - + 5 C2 1µF 16 C3 2µF 6 2 6 V- V+ - C4 2µF 16 |
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