74F191DCQB NSC [National Semiconductor], 74F191DCQB Datasheet - Page 3

• Manufacturer Part Number: 74F191DCQB
• Description: Up/Down Binary Counter with Preset and Ripple Clock
• Manufacturer: NSC [National Semiconductor]

Logic Diagram
TL F 9495 – 5
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays
TL F 9495 – 6
FIGURE 1 n-Stage Counter Using Ripple Clock
TL F 9495 – 7
FIGURE 2 Synchronous n-Stage Counter Using Ripple Carry Borrow
TL F 9495 – 8
FIGURE 3 Synchronous n-Stage Counter with Gated Carry Borrow
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