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SN74LS145NHD74LS145P芯片逻辑
74LS14774LS14574LS14874LS14D
74LS139P74LS139N74LS13PC74LS145D
74LS147N74LS145P74LS148D74LS148N
SN74LS145DSN74LS13ENSN74LS145NSN74LS147N
SN74LS145芯片163N161
SN74LS145DR74HC4511DMC3487DRMC3486DR
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