M54HC643 查看數據表（PDF） - STMicroelectronics
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M54HC643
STMicroelectronics
M54HC643 Datasheet PDF : 11 Pages
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M54/M74HC245/640/643
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Symbol
Parameter
Test Conditions
VCC CL
(V) (pF)
TA = 25 oC
54HC and 74HC
Value
-40 to 85 oC -55 to 125 oC Unit
74HC
54HC
Min. Typ. Max. Min. Max. Min. Max.
tTLH Output Transition 2.0
tTHL Time
4.5 50
25 60
75
90
7
12
19
18
ns
6.0
6
10
13
15
tPLH Propagation
tPHL Delay Time
2.0
4.5 50
33 90
12 18
115
135
23
27
ns
6.0
10 15
20
23
2.0
4.5 150
48 120
150
180
16 24
30
36
ns
6.0
14 20
26
31
tPZL Output Enable
2.0
48 150
190
225
tPZH Time
4.5 50 RL = 1KΩ
16 30
38
45
ns
6.0
14 26
32
38
2.0
63 180
225
270
4.5 150 RL = 1KΩ
21 36
45
54
ns
6.0
18 31
38
46
tPLZ Output Disable
2.0
37 150
190
225
tPHZ Time
4.5 50 RL = 1KΩ
17 30
38
45
ns
6.0
15 26
32
38
CIN
CI/OUT
Input Capacitance
Output
Capacitance
DIR, G
An, Bn
5
10
10
10 pF
13
pF
CPD (*) Power Dissipation
HC245
39
Capacitance
HC640/643
37
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)
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