IN74HC21AD Ver la hoja de datos (PDF) - Integral Corp.
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IN74HC21AD Datasheet PDF : 5 Pages
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IN74HC21A
AC ELECTRICAL CHARACTERISTICS (CL=50pF,Input tr=tf=6.0 ns)
Symbol
Parameter
tPHL, tPLH Maximum Propagation Delay (Figure 1)
tTHL, tTLH Maximum Output Transition Time
(Figure 1)
CIN
Maximum Input Capacitance
VCC
Guaranteed Limit
V 25 °C to ≤85°C ≤125°C Unit
-55°C
2.0 110
140
165
ns
4.5 22
28
33
6.0 19
24
28
2.0 75
95
110
ns
4.5 15
19
22
6.0 13
16
19
5.0 10
10
10
pF
Power Dissipation Capacitance (Per Gate)
CPD Used to determine the no-load dynamic power
consumption:
PD=CPDVCC2f+ICCVCC
TA=25°C,VCC=5.0 V
50
pF
tLH
tHL
0.9
Input
V
2
0.1
tPLH
0.9
V2
0.1
tPHL
Output
0.9
V2
0.1
tTLH
0.9
V2
0.1
tTHL
V1 = 0.5 VCC
Figure 1. Switching Waveforms
V1
GND
VCC
0V
VI
PULSE
GENERAT OR
VCC
DEVICE
UNDER
RT
TEST
VO
CL
50 pF
Termination resistance RT – should
be equal to ZOUT of pulse
generators
Figure 2. Test Circuit
INTEGRAL
4
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