MM74C192 Просмотр технического описания (PDF) - Fairchild Semiconductor

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MM74C192

MM74C192 • Synchronous 4-Bit Up/Down Decade Counter • MM74C193 Synchronous 4-Bit Up/Down Binary Counter

Fairchild Semiconductor 

Timing Diagrams

MM74C192

Note A: Clear outputs to zero.

Note B: Load (preset) to binary thirteen.

Note C: Count up to fourteen, fifteen, carry, zero, one and two.

Note D: Count down to one, zero, borrow, fifteen, fourteen, and thirteen.

MM74C193

Note A: Clear outputs to zero.

Note B: Load (preset) to BCD seven.

Note C: Count up to eight, nine, carry, zero, one, and two.

Note D: Count down to one, zero, borrow, nine, eight, and seven.

Note E: Clear overrides load, data, and count inputs.

Note F: When counting up, count down input must be HIGH; when counting down, count-up input must be HIGH.

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