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ELM405

Part Number	ELM405
Manufacturer	ELM
Description	Rotary Decoder
Published	Dec 20, 2013
Detailed Description	ELM405 Rotary Decoder - 3 wire 4x Interface Description The ELM405 is an 8 pin integrated circuit that is used to conver...
Datasheet	ELM405 PDF File

Overview

ELM405 Rotary Decoder - 3 wire 4x Interface Description The ELM405 is an 8 pin integrated circuit that is used to convert the output from a rotary encoder into three signals (chip select, clock and up/down) that can be used to control various devices.
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 ELM405, as this is all performed within the integrated circuit.
After debouncing the encoder signals, the ELM405 determines the direction of shaft rotation, and then generates the appropriate outputs.
The polarity of the clock output can be changed at any time to accommodate different needs.
The ELM405 provides 4x decoding of a rotary encoder signal.
If your application requires 2x decoding, please see the ELM404 (it is identical to the ELM405 in every respect, except that it provides 2x decoding).
Features • • • • • • • Low power CMOS ...

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