贴片SN74LS245MELGSN74LS245MR1GSN74LS244ML2G
贴片SN74LS244ML1GSN74LS244MR1GSN74LS244MELG
贴片SN74LS244MR2SN74LS244NSRSN74LS244MR1
贴片SN74LS240MR1GSN74LS244DWR2SN74LS240ML2G
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