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M54HCT240 Datasheet(PDF) 6 Page - STMicroelectronics

Part No. M54HCT240
Description  OCTAL BUS BUFFER WITH 3 STATE OUTPUTS HCT240: INVERTED - HCT241/244 NON INVERTED
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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M54HCT240 Datasheet(HTML) 6 Page - STMicroelectronics

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AC ELECTRICAL CHARACTERISTICS (CL =50 pF, Input tr =tf =6 ns)
Symbol
Parameter
Test Conditions
Value
Unit
VCC
(V)
CL
(pF)
TA =25
oC
54HC and 74HC
-40 to 85
oC
74HC
-55 to 125
oC
54HC
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
tTLH
tTHL
Output Transition
Time
4.5
50
7
12
15
18
ns
tPLH
tPHL
Propagation
Delay Time
4.5
50
15
22
28
33
ns
4.5
150
21
30
38
45
ns
tPLH
tPHL
Propagation
Delay Time
4.5
50
15
25
31
38
ns
4.5
150
21
33
41
50
ns
tPZL
tPZH
Output Enable
Time
4.5
50
RL =1K
17
30
38
45
ns
4.5
150
RL =1K
23
38
48
57
ns
tPLZ
tPHZ
Output Disable
Time
4.5
50
RL =1K
16
30
38
45
ns
CIN
Input Capacitance
5
10
10
10
pF
COUT
Output
Capacitance
10
pF
CPD (*)
Power Dissipation
Capacitance
HCT240
HCT241/244
33
31
pF
(*) CPD is defined 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 following equation. ICC(opr) = CPD
•VCC •fIN +ICC/8 (per circuit)
TEST CIRCUIT ICC (Opr.)
HCT240
M54/M74HCT240/241/244
6/12


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