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SN74LS257B Quad 2-Input Multiplexer

SN74LS257B Description

SN74LS257B, SN74LS258B Quad 2 *Input Multiplexer with 3 *State Outputs The LSTTL / MSI SN74LS257B and the SN74LS258B are Quad 2-Input M.
The LS257B and LS258B are Quad 2-Input Multiplexers with 3-state outputs.

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Quad 2-Input Multiplexer ON Semiconductor
ON Semiconductor SN74LS257B-like datasheet