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HD74HC138 Datasheet, PDF (6/9 Pages) Hitachi Semiconductor – 3-to-8-line Decoder/Demultiplexer | |||
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HD74HC138
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C
Ta = â40 to
+85°C
Item
Symbol
Propagation delay tPHL
time
VCC (V)
2.0
4.5
Min Typ Max Min
â â 175 â
â 17 35 â
Max Unit
220 ns
44
6.0
â â 30 â 37
t PLH
2.0
â â 150 â 190 ns
4.5
â 16 30 â 38
6.0
â â 26 â 33
t PHL
2.0
â â 150 â 190 ns
4.5
â 16 30 â 38
6.0
â â 26 â 33
t PLH
2.0
â â 150 â 190 ns
4.5
â 17 30 â 38
6.0
â â 26 â 33
t PHL
2.0
â â 175 â 220 ns
4.5
â 15 35 â 44
6.0
â â 30 â 37
t PLH
2.0
â â 150 â 190 ns
4.5
â 17 30 â 38
6.0
â â 26 â 33
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
A, B or C to Output
G1 to Output
G2A or G2B to Output
4
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