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HD74HC540 Datasheet, PDF (5/9 Pages) Hitachi Semiconductor – Octal Buffers/Line Drivers (with 3-state outputs)
HD74HC540/HD74HC541
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C
Ta = –40 to
+85°C
Item
Symbol
Propagation delay tPLH
time
t PHL
VCC (V)
2.0
4.5
6.0
Min Typ Max Min
— — 100 —
— 11 20 —
— — 17 —
Max Unit
125 ns
25
21
t PLH
2.0
— — 115 — 145 ns
t PHL
4.5
— 12 23 — 29
6.0
— — 20 — 25
Output enable
t ZH
time
t ZL
2.0
— — 150 — 190 ns
4.5
— 14 30 — 38
6.0
— — 26 — 33
Output disable
t HZ
time
t LZ
2.0
— — 150 — 190 ns
4.5
— 16 30 — 38
6.0
— — 26 — 33
Output rise/fall
t TLH
time
t THL
2.0
— — 60 — 75 ns
4.5
— 4 12 — 15
6.0
— — 10 — 13
Input capacitance Cin
—
— 5 10 — 10 pF
Test Conditions
(HD74HC540 only)
(HD74HC541 only)
5