поискавой системы для электроныых деталей |
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HCPL-2300E датащи(PDF) 10 Page - AVAGO TECHNOLOGIES LIMITED |
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HCPL-2300E датащи(HTML) 10 Page - AVAGO TECHNOLOGIES LIMITED |
10 / 14 page 10 Applications The HCPL-2300/HCPL-0300 optocoupler has the unique combinationoflow0.5mALEDoperatingdrivecurrentata 5 MBd speed performance. Low power supply current requirement of 10 mA maximum at 5.25V and the abil- ity to provide isolation between logic systems fulfills numerous applications ranging from logic level transla- tions, line receiver and party line receiver applications, microprocessor I/O port isolation, etc. The open collector output allows for wired-OR arrangement. Specific inter- face circuits are illustrated in Figures 12-16, and 18 with corresponding component values, performance data and recommended layout in Figures 17 and 19. For -40°C to 85°C operating temperature range, a mid- range LED forward current (I F) of 0.625 mA is recommend- ed in order to prevent overdriving the integrated circuit detector due to increased LED efficiency at temperatures between 0°C and -40°C. For narrower temperature range of 0°C to 85°C, a suggested operating LED current of 0.75 mA is recommended for the mid-range operating point and for minimal propagation delay skew. A peaking capacitance of 20 pF in parallel with the cur- rent limiting resistor for the LED shortens t PHL by approxi- mately 33% and t PLH by 13%. Maintaining LED forward voltage (V F) below 0.8 V will guarantee that the HCPL- 2300/HCPL-0300 output is off. The recommended shunt drive technique for TTL/LSTTL/ CMOS of Figure 12 provides for optimal speed perfor- mance, no leakage current path through the LED, and re- duced common mode influences associated with series switching of a “floating” LED. Alternate series drive tech- niques with either an active CMOS inverter or an open collector TTL/LSTTL inverter are illustrated in Figures 13 and 14 respectively. Open collector leakage current of 250 µA has been compensated by the 3.16 KΩ resistor (Figure 14) at the expense of twice the operating forward current. An application of the HCPL-2300/HCPL-0300 as an un- balanced line receiver for use in long line twisted wire pair communication links is shown in Figure 15. Low LED I F and VF allow longer line length, higher speed and multiple stations on the line in comparison to higher I F, VF optocouplers. Greater speed performance along with nearly infinite common mode immu- nity are achieved via the balanced split phase circuit of Figure 16. Basic balanced differential line re- ceiver can be accomplished with one HCPL- 2300/HCPL-0300 in Figure 16, but with a typical 400 V/µs common mode immunity. Data rate versus dis- tance for both the above unbalanced and balanced line receiver applications are compared in Figure 17. The RS- 232-C interface circuit of Figure 18 provides guaranteed minimum common mode immunity of 100V/µs while maintaining the 2:1 dynamic range of I F. Figure 10. Test circuit for common mode transient immunity and typical waveforms. HCPL-0300/ HCPL-2300 |
Аналогичный номер детали - HCPL-2300E |
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Аналогичное описание - HCPL-2300E |
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