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74AC399CW 数据手册 ( 数据表 )

零件编号产品描述 (功能)生产厂家
74AC399CW Quad 2-Port Register Fairchild
Fairchild Semiconductor Fairchild
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General Description
The AC/ACT399 is the logical equivalent of a quad 2-input multiplexer feeding into four edge-triggered flip-flops. A common Select input determines which of the two 4-bit words is accepted. The selected data enters the flip-flop on the rising edge of the clock.

Features
■ ICC reduced by 50%
■ Select inputs from two data sources
■ Fully positive edge-triggered operation
■ Outputs source/sink 24 mA
■ AC/ACT399 has TTL-compatible inputs

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