About the sn74hc240 logic chip

The logic chip used is a ``OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS'' SN74HC240.

especially the ``HC'' specs low power consumption (lower than a ``AC'' version), but with lower max output current.
240_a 240_b

• texas sn74hc240n datasheet (from http://www.datasheetcatalog.org)

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