ELM ELM409
The ELM409 is digital filter circuit that is used to interface mechanical contacts to electronic circuits. When that contact is used for the electrical input to a digital circuit, the bounces can easily be incorrectly interpreted as multiple inputs. The ELM409 contains all of the logic that is typically required to remove the bounce from such signals, and provide a signal that has only one transition.| Part No. | ELM409 |
|---|---|
| Datasheet | ELM409 Download |
| Manufacturer |  ELM |
| Description | Versatile Debounce Circuit |
| Buy | Stock & Price |
DESCRIPTION
All mechanical contacts, whether from switches, relays, etc. will have inherent ‘bounce’ when they make or break a connection. In addition to providing the standard debounce function, the ELM409 may also be configured for other useful functions such as generating pulses or alternating output levels on signal transitions. No external components are needed for the operation of the ELM409, as all timing and logic functions are performed internally.FEATURES
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● Standard and extra long debounce times Schmitt input provides hysteresis Complementary circuit outputs Needs no external timing components Low power CMOS design - typically 1 mA at 5V Wide supply range - 3.0 to 5.5 volt operation High current drive outputs Connection Diagram PDIP and SOIC (top view) VDD 1 2 3 4 8 7 6 5 VSS Out Out In
APPLICATIONS
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● Pushbutton interface for logic circuits Limit switch monitoring Time delay generation Power on sequencing A B C Block Diagram A 2 B 3 C 4 Control Logic edge d...
