IN74HC251AD Ver la hoja de datos (PDF) - Integral Corp.
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IN74HC251AD Datasheet PDF : 5 Pages
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IN74HC251A
AC ELECTRICAL CHARACTERISTICS(CL=50pF,Input tr=tf=6.0 ns)
VCC
Guaranteed Limit
Symbol
Parameter
V 25 °C ≤85°C ≤125 Unit
to
°C
-55°C
tPLH, Maximum Propagation Delay, Input D to 2.0 185 230 280 ns
tPHL Output Y or Y (Figures 1,2 and 5)
4.5 37
46
56
6.0 31
39
48
tPLH, Maximum Propagation Delay , Input A to 2.0 205 255 310 ns
tPHL Output Y or Y (Figures 3 and 5)
4.5 41
51
62
6.0 35
43
53
tPLZ, Maximum Propagation Delay , Output 2.0 195 245 295 ns
tPHZ Enable
to 4.5 39
48
59
Output Y (Figures 4 and 6)
6.0 33
42
50
tPZL, Maximum Propagation Delay , Output 2.0 145 180 220 ns
tPZH Enable
to 4.5 29
36
44
Output Y (Figures 4 and 6)
6.0 25
31
38
tPLZ, Maximum Propagation Delay , Output 2.0 220 275 330 ns
tPHZ Enable
to 4.5 44
55
66
Output Y (Figures 4 and 6)
6.0 37
47
56
tPZL, Maximum Propagation Delay , Output 2.0 150 190 225 ns
tPZH Enable
to 4.5 30
38
45
Output Y (Figures 4 and 6)
6.0 26
33
38
tTLH, tTHL Maximum Output Transition Time, Any 2.0 75
Output
4.5 15
95 110 ns
19
22
(Figures 1 and 6)
6.0 13
16
19
CIN Maximum Input Capacitance
- 10
10
10 pF
COUT Maximum
Three-State
Output - 15
15
15 pF
Capacitance (Output in High-Impedance
State)
Power Dissipation Capacitance (Per Typical @25°C,VCC=5.0 V
Package)
CPD Used to determine the no-load dynamic
36
pF
power consumption: PD=CPDVCC2f+ICCVCC
Figure 1. Switching Waveforms
Figure 2. Switching Waveforms
4
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