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HD74HC540 Datasheet, PDF (5/9 Pages) Hitachi Semiconductor – Octal Buffers/Line Drivers (with 3-state outputs) | |||
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HD74HC540/HD74HC541
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 100 â
â 11 20 â
â â 17 â
Max Unit
125 ns
25
21
t PLH
2.0
â â 115 â 145 ns
t PHL
4.5
â 12 23 â 29
6.0
â â 20 â 25
Output enable
t ZH
time
t ZL
2.0
â â 150 â 190 ns
4.5
â 14 30 â 38
6.0
â â 26 â 33
Output disable
t HZ
time
t LZ
2.0
â â 150 â 190 ns
4.5
â 16 30 â 38
6.0
â â 26 â 33
Output rise/fall
t TLH
time
t THL
2.0
â â 60 â 75 ns
4.5
â 4 12 â 15
6.0
â â 10 â 13
Input capacitance Cin
â
â 5 10 â 10 pF
Test Conditions
(HD74HC540 only)
(HD74HC541 only)
5
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