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IN74HC257A View Datasheet(PDF) - IK Semicon Co., Ltd

Part Name
Description
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IN74HC257A Datasheet PDF : 6 Pages
1 2 3 4 5 6
IN74HC257A
AC ELECTRICAL CHARACTERISTICS (CL=50pF,Input tr=tf=6.0 ns)
Symbol
Parameter
tPLH, tPHL Maximum Propagation Delay, Nibble A or B to
Output Y (Figures 1and 4)
tPLH, tPHL Maximum Propagation Delay , Select to
Output Y (Figures 2 and 4)
tPLZ, tPHZ Maximum Propagation Delay , Output Enable to
Output Y (Figures 3 and 5)
tPZL, tPZH Maximum Propagation Delay , Output Enable to
Output Y (Figures 3 and 5)
tTLH, tTHL Maximum Output Transition Time, Any Output
(Figures 1 and 4)
CIN
COUT
Maximum Input Capacitance
Maximum Three-State Output Capacitance
(Output in High-Impedance State)
VCC
Guaranteed Limit
V 25 °C 85°C 125°C Unit
to
-55°C
2.0 100
125
150
ns
4.5 20
25
30
6.0 17
21
26
2.0 100
125
150
ns
4.5 20
25
30
6.0 17
21
26
2.0 150
190
225
ns
4.5 30
38
45
6.0 26
33
38
2.0 150
190
225
ns
4.5 30
38
45
6.0 26
33
38
2.0 60
75
90
ns
4.5 12
15
18
6.0 10
13
15
-
10
10
10
pF
-
15
15
15
pF
Power Dissipation Capacitance (Per Package)
CPD Used to determine the no-load dynamic power
consumption:
PD=CPDVCC2f+ICCVCC
Typical @25°C,VCC=5.0 V
39
pF
Figure 1. Switching Waveforms
Figure 2. Switching Waveforms
Rev. 00
 

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