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National Semiconductor
5420 Dual 4-Input NAND Gates
5420 DM5420 DM7420 Dual 4-Input NAND Gates June 1989 5420 DM5420 DM7420 Dual 4-Input NAND Gates General Description This device contains two independent gates each of which performs the logic NAND function Features Y Alternate Military Aerospace device (5420) is available Con
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Texas
5423 Dual 4-Input Positive NOR Gate
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San Mao
54240 Eight three-state inverting buffer / line driver / line receiver
54/74240 八三态反相缓冲器/线驱动器/线接收器(3S,两组控制) 简要说明: 240 为三态输出的八组反相缓冲器和总线驱动器,共有 54/74S240 和 54/74LS240 两种线路结构型式,其主要电器特性的典型值如下(不同厂家具体值有差
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ETC
54248 BCD to 7-Segment Decoder / Driver
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Texas
5425 Dual 4-Input Positive NOR Gate
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National Semiconductor
5425 Dual 4-Input NOR Gate
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National Semiconductor
54279 Quad Set-Reset Latch
54279 DM74279 Quad Set-Reset Latch June 1989 54279 DM74279 Quad Set-Reset Latch General Description This device contains four independent set-reset type flipflops with one Q output each Connection Diagram Dual-In-Line Package TL F 9785 – 1 Order Number 54279DMQB 54279FMQB
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Texas Instruments
54279 Quadruple S-R Latches
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San Mao
54284 4-bit parallel binary multiplier x4
54/74284 4 位 x4 位并行二进制乘法器(OC,产生高位积) 简要说明: 54/74284 为集电极开路的 4 位 x4 位并行二进制乘法器,其主要电特性的典 型值如下(具体厂家有可能不是完全一至): 型号 54/74284 tPLH(A到F) 40ns PD 46
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