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HD74HC279 Datasheet, PDF (4/9 Pages) Hitachi Semiconductor – Quad. S-R Latches | |||
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HD74HC279
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C
Ta = â40 to
+85°C
Item
Symbol
Propagation delay tPLH
time
t PHL
VCC (V)
2.0
4.5
6.0
Min Typ Max Min
â â 130 â
â 10 26 â
â â 22 â
Max Unit
165 ns
33
28
t PHL
2.0
â â 120 â 150 ns
4.5
â 12 24 â 30
6.0
â â 20 â 26
Output rise/fall
t TLH
time
t THL
2.0
â â 75 â 95 ns
4.5
â 5 15 â 19
6.0
â â 13 â 16
Input capacitance Cin
â
â 5 10 â 10 pF
Test Conditions
S to Q
R to Q
4
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