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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PM8805 датащи(PDF) 6 Page - STMicroelectronics |
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PM8805 датащи(HTML) 6 Page - STMicroelectronics |
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6 / 45 page  Pin description and connection diagram PM8805 6/45 DS12813 Rev 1 2 Pin description and connection diagram Figure 3. Pin connections (top view) Table 2. Pin description Pin# Name Function 1, 40, 41 IN78 Input for the signals connected to "Spare" pairs. This signal along with IN45 signals is used to feed the 2nd internal bridge. 2VB Internal reference voltage 5V up to 10mA; filter this pin with a ceramic capacitor of 100nF typ. connected to AGND. This voltage can be used to bias the I/O pins of PM8805, if needed. 3 STBY A high level applied to this pin activates an internal 10 / 18mA current source to implement the MPS feature. Duty cycle is Long (.af /.at) or Short (.bt) depending on the detected PSE: Type 2, or Type 3 and 4. Use a resistor voltage divider to AGND to connect this 5V voltage rating pin: typical value for the threshold is 1.25V. If higher than 0.5V during first classification finger, Autoclass feature is enabled. Connect this pin to AGND if not used. 4 CLS1 Classification resistor pin for first and second Class Events. Connect a 0805 classification programming resistor from this pin to AGND. The external resistor is activated with a 3.3ms typ. delay with respect to the classification event. |
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