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3-Wire Sinking Interface
Sinking outputs are often used in negative logic applications, where a low signal is
required for an active state. Therefore, sinking outputs normally have current flowing
into the device output lead when the device is active. Also called ģopen collector outputs,ī
sinking outputs are compatible with any logic family since a wide voltage range may be used for Vcc.
Furthermore, the voltage level used to power the Hall effect assembly may differ from the pull-up
resistor to which it is attached. The external pull-up resistor connected between the output and Vcc is required for proper operation.
With the resistor connected as shown, the output will be īpulled upī to Vcc when off and (approximately) to ground when on.
Recommended pull-up resistor values are as follows:
Volts dc |
5 |
9 |
12 |
15 |
24 |
Ohms |
1K |
1.8K |
2.4K |
3K |
3K |
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