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DM74S74N Ver la hoja de datos (PDF) - Fairchild Semiconductor

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DM74S74N Dual Positive-Edge-Triggered D Flip-Flops with Preset, Clear, and Complementary Outputs Fairchild
Fairchild Semiconductor Fairchild
DM74S74N Datasheet PDF : 5 Pages
1 2 3 4 5
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Typ
Min
Max
(Note 5)
VI
Input Clamp Voltage
VCC = Min, II = − 18 mA
VOH
HIGH Level
VCC = Min, IOH = Max
Output Voltage
VIL = Max, VIH = Min
VOL
LOW Level
VCC = Min, IOL = Max
Output Voltage
VIH = Min, VIL = Max
II
Input Current @ Max Input Voltage VCC = Max, VI = 5.5V
IIH
HIGH Level
VCC = Max
Input Current
VI = 2.7V
2.7
D
Clear
Preset
1.2
3.4
0.5
1
50
150
100
Clock
100
IIL
LOW Level
VCC = Max
D
2
Input Current
VI = 0.5V
Clear
6
(Note 6)
Preset
4
Clock
4
IOS
Short Circuit Output Current
ICC
Supply Current
Note 5: All typicals are at VCC = 5V, TA = 25°C.
VCC = Max (Note 7)
VCC = Max, (Note 8)
40
100
30
50
Note 6: Clear is tested with preset HIGH and preset is tested with clear HIGH.
Note 7: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 8: With all outputs OPEN, ICC is measured with the Q and Q outputs HIGH in turn. At the time of measurement, the clock is grounded.
Switching Characteristics
at VCC = 5V and TA = 25°C
Symbol
Parameter
fMAX
tPLH
tPLH
tPHL
tPHL
tPHL
tPHL
tPLH
tPHL
Maximum Clock Frequency
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
(Clock HIGH)
Propagation Delay Time
HIGH-to-LOW Level Output
(Clock LOW)
Propagation Delay Time
HIGH-to-LOW Level Output
(Clock HIGH)
Propagation Delay Time
HIGH-to-LOW Level Output
(Clock LOW)
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
From (Input)
To (Output)
Preset to Q
Clear to Q
Preset to Q
Preset to Q
Clear to Q
Clear to Q
Clock to Q or Q
Clock to Q or Q
RL = 280
CL = 15 pF
CL = 50 pF
Min
Max
Min
Max
75
65
6
9
6
9
13.5
17
8
14
13.5
16
8
13
9
12
9
14
Units
V
V
V
mA
µA
mA
mA
mA
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
3
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