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74VHCT74AM bảng dữ liệu(PDF) 4 Page - Fairchild Semiconductor

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Giải thích chi tiết về linh kiện  Dual D-Type Flip-Flop with Preset and Clear
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nhà sản xuất  FAIRCHILD [Fairchild Semiconductor]
Trang chủ  http://www.fairchildsemi.com
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©2008 Fairchild Semiconductor Corporation
www.fairchildsemi.com
74VHCT74A Rev. 1.4.0
4
DC Electrical Characteristics
AC Electrical Characteristics
Notes:
5. VCC is 5.0 ± 0.5V
6. CPD is defined as the value of internal equivalent capacitance which is calculated from the operating
current consumption without load. Average operating current can be obtained by the equation:
ICC (Opr.) = CPD • VCC • fIN + ICC / 2 (per flip-flop).
Symbol
Parameter
VCC (V)
Conditions
TA = 25°C
TA = –40°C
to +85°C
Units
Min.
Typ. Max. Min. Max.
VIH
HIGH Level Input
Voltage
4.5
2.0
2.0
V
5.5
2.0
2.0
VIL
LOW Level Input
Voltage
4.5
0.8
0.8
V
5.5
0.8
0.8
VOH
HIGH Level Output
Voltage
4.5
VIN = VIH
or VIL
IOH = –50µA 4.40
4.50
4.40
V
4.5
IOH = –8mA
3.94
3.80
VOL
LOW Level Output
Voltage
4.5
VIN = VIH
or VIL
IOL = 50µA
0.0
0.1
0.1
V
4.5
IOL = 8mA
0.36
0.44
IIN
Input Leakage
Current
0–5.5
VIN = 5.5V or GND
±0.1
±1.0
µA
ICC
Quiescent Supply
Current
5.5
VIN = VCC or GND
2.0
20.0
µA
ICCT
Maximum ICC/ Input
5.5
VIN = 3.4V, Other
Inputs
= VCC or GND
1.35
1.50
mA
IOFF
Output Leakage
Current (Power
Down State)
0.0
VOUT = 5.5V
+0.5
+5.0
µA
Symbol
Parameter
VCC (V)(5) Conditions
TA = 25°C
TA = –40°C
to +85°C
Units
Min.
Typ.
Max.
Min.
Max.
fMAX
Maximum Clock
Frequency
5.0
CL = 15pF
100
160
80
MHz
5.0
CL = 50pF
80
140
65
tPLH, tPHL Propagation Delay
Time (CK-Q, Q)
5.0
CL = 15pF
5.8
7.8
1.0
9.0
ns
5.0
CL = 50pF
6.3
8.8
1.0
10.0
tPLH, tPHL Propagation Delay
Time (CLR, PR-Q, Q)
5.0
CL = 15pF
7.6
10.4
1.0
12.0
ns
5.0
CL = 50pF
8.1
11.4
1.0
13.0
CIN
Input Capacitance
VCC = Open
4
10
10
pF
CPD
Power Dissipation
Capacitance
(6)
24
pF


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