Datenblatt-Suchmaschine für elektronische Bauteile |
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HCPL-0561 Datenblatt(PDF) 11 Page - Agilent(Hewlett-Packard) |
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HCPL-0561 Datenblatt(HTML) 11 Page - Agilent(Hewlett-Packard) |
11 / 16 page 11 Application Information The HCPL-0560 (common VCC configuration) and HCPL-0561 (common GND configuration) optoisolators are ideal for use in bi-directional data transmission and communication applications. Each of the two configurations contains two optoisolators each in an industry standard SOIC-8 package. Bi-directional here implies that there are two emitter-detector pairs assembled in opposite direction across the isolation barrier. This allows simultaneous, bi-directional, full duplex data transmission capability within a single optoisolator package. The HCPL-0560 is internally connected in a “common VCC” configuration, which means that the LED anode of one channel is connected to the VCC pin of the second channel on each side of the isolation barrier. The HCPL- 0561 is internally connected in a “common GND” configuration, which means that the LED cathode of one channel is connected to the emitter or GND of the second channel on each side of the isolation barrier. Having a maximum guaranteed speed of 1 Mbd the HCPL-0560 and HCPL-0561 are ideal for applications involving the RS-232-E (TIA/EIA-232) data transmission standard. If these optoisolators are used in RS-232-E applications, it is understood that the optoisolators will be used in conjunction with an appropriate transceiver of the RS-232-E standard. The common VCC configuration (HCPL-0560) transmits non- inverting signal with respect to the cathode voltage of the LED pins (4,8) in the driver configuration shown Figure 15. When the input signal at the base of the driver transistor (2N3904) is high, the input LED conducts drive current, and allows the output of the optoisolator to be in the low state. Thus, when the cathode voltage is low (LED ON) the output is low, and when the cathode voltage is high (LED OFF) the output will be high. In other words, HCPL-0560 can be considered to transmit non- inverting signal. The common GND configuration (HCPL-0561) transmits inverting signal with respect to the anode voltage of the LED pins (4,8) in the driver configuration shown in Figure 16. Figure 14. Test Circuit for Transient Immunity and Typical Waveforms (HCPL-0561). 8 7 6 5 0.1 µF 5 V VO RL GND1 VOA VCC1 VINB VINA VOB GND2 VCC2 HCPL-0561 1 2 3 4 2 2 CL = 15 pF* *INCLUDES PROBE AND FIXTURE CAPACITANCE SHIELD SHIELD 1.9 k Ω 10 V VCM VO tR tF VOL 5 V B PULSE GEN. VCM +– 90 % 90 % 10 % 10 % VO SWITCH AT B: IF = 16 mA SWITCH AT A: IF = 0 mA RF VFF LED LED A |
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Ähnliche Beschreibung - HCPL-0561 |
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