3-8 线路解码器

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MM74HC138 解码器采用先进的硅门极 CMOS 工艺制造,非常适合内存地址解码或数据路由应用。该电路都具有高抗扰度和低功耗的特点,通常与 CMOS 电路关联,但其速度可与低功耗的肖特基 TTL 逻辑相媲美。MM74HC138 有 3 个二进制选择输入(A、B 和 C)。如果启用该器件,这些输入将确定八个正常的高电平输出中哪一个将变为低电平。提供了两个低电平有效启用和一个高电平有效启用(G1、G2A#和 G2B#),以简化解码器的级联。解码器的输出可驱动 10 个低功率肖特基 TTL 等效负载,并且在功能和引脚上都等效于 74LS138。通过将二极管箝位到 VCC 和接地,可防止所有输入因静电放电而受损。

  • This product is general usage and suitable for many different applications.
  • 典型传播延迟: 20 ns
  • 宽电源范围: 2V-6V
  • 低静态电流: 80 µA,最大值(74 HC系列)
  • 低输出电流: 最大值为 1 μA
  • 10 LS-TTL 负载扇出

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MM74HC138M

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SOIC-16

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MM74HC138MTC

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MM74HC138MTCX

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MM74HC138MX

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MM74HC138N

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