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HIN213 Datasheet(PDF) 9 Page - Intersil Corporation |
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HIN213 Datasheet(HTML) 9 Page - Intersil Corporation |
9 / 18 page 9 Application Information 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 5kW 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. Typical Performance Curves FIGURE 5. V- SUPPLY VOLTAGE vs VCC FIGURE 6. V+, V- OUTPUT VOLTAGE vs LOAD 12 10 8 6 4 2 0 3.5 4.0 4.5 6.0 VCC 5.0 5.5 3.0 0.1 µF 35 |ILOAD| (mA) V+ (VCC = 4V) V+ (VCC = 5V) V- (VCC = 5V) V- (VCC = 4V) TA = 25 oC TRANSMITTER OUTPUTS OPEN CIRCUIT 30 25 20 15 10 5 0 0 12 10 8 6 4 2 Test Circuits (HIN202) FIGURE 7. GENERAL TEST CIRCUIT FIGURE 8. POWER-OFF SOURCE RESISTANCE CONFIGURATION 14 15 16 9 13 12 11 10 1 2 3 4 5 7 6 8 C1+ V+ C1- C2+ C2- V- R2IN T2OUT VCC T1OUT R1IN R1OUT T1IN T2IN R2OUT GND +4.5V TO +5.5V INPUT 3k Ω T1 OUTPUT RS-232 ±30V INPUT TTL/CMOS OUTPUT TTL/CMOS INPUT TTL/CMOS INPUT TTL/CMOS OUTPUT + - 0.1 µF C3 + - 0.1 µF C1 + - 0.1 µF C2 0.1 µF C4 3k Ω OUTPUT RS-232 ±30V INPUT T2 14 15 16 9 13 12 11 10 1 2 3 4 5 7 6 8 C1+ V+ C1- C2+ C2- V- R2IN T2OUT VCC T1OUT R1IN R1OUT T1IN T2IN R2OUT GND T2OUT T1OUT VIN = ±2V A ROUT = VIN/I HIN202, HIN206, HIN207, HIN208, HIN211, HIN213 |
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