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ELM402 - Rotary Decoder

General Description

The ELM402 is an 8 pin integrated circuit that is used to convert the signals from a rotary encoder into a series of up and down output pulses.

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.

Key Features

  • Low power CMOS design Wide supply range.
  • 2.0 to 5.5 volts Complete debouncing of the encoder inputs No external filtering needed 2x decoding Startup delay timer High current drive outputs Connection Diagram PDIP and SOIC (top view) VDD 1 2 3 4 8 7 6 5 VSS Up Down Output Invert.

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Datasheet Details

Part number ELM402
Manufacturer ELM
File Size 76.52 KB
Description Rotary Decoder
Datasheet download datasheet ELM402 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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ELM402 Rotary Decoder - 2 wire 2x Interface Description The ELM402 is an 8 pin integrated circuit that is used to convert the signals from a rotary encoder into a series of up and down output pulses. 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 ELM402, as this is all performed within the integrated circuit. After debouncing the encoder signals, the ELM402 then determines the direction of shaft rotation, and generates the appropriate pulses at the Up or Down output pins. The duration of these pulses can be selected for either 0.2 or 2.0 msec. The ELM402 provides 2x decoding of a rotary encoder signal.