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S3, S4
U a1 , U a1 , U a2 , U a2 , ¬ U aS = low
High impedance (three-state)
alta impendenza (tristate)
Low impedance
bassa impendenza
Min. edge separation
min. distanza tra i fronti
TRI
Max. input frequency, tolerance ±5%
max frequenza ingresso, Tolleranza ±5 %
FC2
FC1
FC0
TTL x 5
S4
TTL x 20
TTL x 10
S3
TTL x 25
TTL x 50
TTL x 100
19
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