Datasheet

TEST CIRCUIT I
CC
(Opr.)
HC540
AC ELECTRICAL CHARACTERISTICS (C
L
=50pF,Inputt
r
=t
f
=6ns)
Symbol Parameter
Test Conditions Value
Unit
V
CC
(V)
C
L
(pF)
T
A
=25
o
C
54HC and 74HC
-40 to 85
o
C
74HC
-55 to 125
o
C
54HC
Min. Typ. Max. Min. Max. Min. Max.
t
TLH
t
THL
Output Transition
Time
2.0
50
25 60 75 90
ns
4.5 7121918
6.0 6101315
t
PLH
t
PHL
Propagation
Delay Time
2.0
50
40 85 105 130
ns
4.5 10 17 21 26
6.0 9141822
2.0
150
56 115 145 175
ns
4.5 14 23 29 35
6.0 12 20 25 30
t
PZL
t
PZH
Output Enable
Time
2.0
50 R
L
=1KΩ
47 110 140 165
ns
4.5 13 22 28 33
6.0 11 19 24 28
2.0
150 R
L
=1KΩ
61 135 170 205
ns
4.5 17 27 34 41
6.0 14 23 29 35
t
PLZ
t
PHZ
Output Disable
Time
2.0
50 R
L
=1KΩ
52 110 140 165
ns
4.5 15 22 28 33
6.0 13 19 24 28
C
IN
Input Capacitance 5 10 10 10 pF
C
PD
(*) Power Dissipation
Capacitance
31
pF
(*) C
PD
isdefined as the value ofthe IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the following equation. I
CC
(opr) = C
PD
•V
CC
•f
IN
+I
CC
/8 (per gate)
M54/M74HC540/541
6/12