M54/M74HC7240/7241/7244
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Test Conditions
Value
TA = 25 oC
54HC and 74HC
-40 to 85 oC -55 to 125 oC
Symbol
Parameter
Unit
VCC CL
74HC
54HC
(V) (pF)
2.0
Min. Typ. Max. Min. Max. Min. Max.
tTLH
tTHL
Output Transition
Time
25
7
60
12
75
19
50
ns
ns
ns
ns
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
6
10
13
tPLH
tPHL
Propagation
Delay Time
50
15
13
68
21
16
48
21
19
5
125
25
155
31
50
21
26
tPZL
tPZH
Output Enable
Time
150
30
190
38
50 RL = 1KΩ
50 RL = 1KΩ
26
32
tPLZ
tPHZ
Output Disable
Time
150
30
190
38
26
32
CIN
Input Capacitance
10
10
10
pF
pF
COUT
Output
Capacitance
10
CPD (*) Power Dissipation
Capacitance
HC7240
HC7241/7244
33
34
pF
(*) CPD isdefined as the value of the 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 followingequation. ICC(opr) = CPD • VCC • fIN + ICC/8 (per channel)
TEST CIRCUIT ICC (Opr.)
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STMICROELECTRONICS [ ST ]
