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ELM401

Part Number	ELM401
Manufacturer	ELM
Description	Rotary Encoder Debounce Circuit
Published	Dec 20, 2013
Detailed Description	ELM401 Rotary Encoder Debounce Circuit Description The ELM401 is an 8 pin integrated circuit that is used to ‘debounce’ ...
Datasheet	ELM401 PDF File

Overview

ELM401 Rotary Encoder Debounce Circuit Description The ELM401 is an 8 pin integrated circuit that is used to ‘debounce’ the signals from a mechanical rotary (quadrature) encoder.
The low power CMOS technology used ensures that only a very small current is required over the entire 2.
0 to 5.
5 volt operating range.
There is no need for external filtering or debounce circuits with the ELM401, as this is all performed within the integrated circuit.
The ‘A’ and ‘B’ motion sensing encoder signals are both passed through a filter then a comparator circuit, and finally a timer circuit to remove noise and contact bounce, while the switch input receives standard debounce processing.
The result are thre...

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