【产品】沁恒低阻模拟开关芯片CH440/2/3/4/8/5，低导通电阻，Ron典型值约为5Ω

时间： 2022-06-09 来源：沁恒

技术问答

沁恒品牌推出了CH440G、CH440P、CH440R、CH442E、CH443K、CH444G、CH444P、CH445P、CH448F 低阻模拟开关芯片，低导通电阻，Ron典型值约为5Ω，高带宽，支持视频信号，支持低速、全速和高速USB信号。本系列产品还具备宽电源电压范围，低静态功耗等特性。

CH440、CH445是QPDT低阻宽带双向模拟开关芯片，包含4路单刀双掷二选一开关。可用于视频或者USB信号二选一切换。

CH442是2DPDT低阻宽带双向模拟开关芯片，包含2路单刀双掷二选一开关。可用于视频或者USB信号二选一切换。

CH443是SPDT低阻宽带双向模拟开关芯片，包含1路单刀双掷二选一开关。可用于视频等信号二选一切换，或用于与/或/非等简单逻辑门电路。

CH444是DPQT低阻宽带双向模拟开关芯片，包含2路单刀四掷四选一开关。可以用于视频或者USB信号四选一切换。

CH448是DPOT低阻宽带双向模拟开关芯片，包含2路单刀八掷八选一开关。可以用于视频或者USB信号八选一切换。另外，通过对两通道全局使能引脚进行组合控制还可以实现即十六选一开关。

特点

低导通电阻，Ron典型值约为5Ω

高带宽，支持视频信号，支持低速、全速和高速USB信号

切换快速，Ton、Toff典型值小于5nS

ESD支持2KV HBM

CH440/CH442/CH444/CH445/CH448提供全局使能引脚，多通道模拟开关统一使能、统一切换

CH448支持差分信号，并且为两个信号通道提供独立的全局使能引脚

CH448控制信号独立于电源电压，支持5V、3.3V、2.5V控制信号

宽电源电压范围，低静态功耗，5V开关芯片支持额定5V电源电压，低至2.5V电源可用，3.3V开关芯片支持额定3.3V电源电压，低至1.8V电源可用

封装

注：

1、原型号CH440E已用新型号CH442E代替，引脚和功能完全相同。

2、体积小通常寄生L/C小，对高频信号应用，建议优先选用QFN或SOT等小封装形式。

3、QFN封装的底板标示为0#引脚，对于CH448F是必要连接。

4、CH443K为盘装，每盘整包装数量为3000只，可以零售，但是零售时不会逐个清点数量。

5、CH443K封装体积较小，正面印字仅有代号43而不含全部型号。

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