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HD74HC688 Datasheet, PDF (5/9 Pages) Hitachi Semiconductor – 8-bit Magnitude Comparator | |||
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HD74HC688
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 210 â
â 17 42 â
â â 36 â
Max Unit
265 ns
53
45
t PLH
2.0
â â 120 â 150 ns
t PHL
4.5
â 9 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
P or Q to output
Enable to P=Q
5
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