74F191SC 查看數據表（PDF） - Fairchild Semiconductor

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74F191SC

Up/Down Binary Counter with Preset and Ripple Clock

Fairchild Semiconductor 

FIGURE 1. n-Stage Counter Using Ripple Clock

FIGURE 2. Synchronous n-Stage Counter Using Ripple Carry/Borrow

FIGURE 3. Synchronous n-Stage Counter with Gated Carry/Borrow

Logic Diagram

Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.

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