MC74HC253 데이터 시트보기 (PDF) - Motorola => Freescale
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MC74HC253 Datasheet PDF : 5 Pages
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ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Symbol
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ tPLH,
tPHL
Parameter
Maximum Propagation Delay, Data to Output Y
(Figures 1 and 3)
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ tPLH,
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ tPHL
Maximum Propagation Delay, Address to Output Y
(Figures 1 and 3)
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ tPLZ,
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ tPHZ
Maximum Propagation Delay, Output Enable to Y
(Figures 2 and 4)
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ tPZL,
tPZH
Maximum Propagation Delay, Output Enable to Y
(Figures 2 and 4)
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ tTLH,
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ tTHL
Maximum Output Transition Time, Any Output
(Figures 1 and 3)
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Cin
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Cout
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ NOTES:
Maximum Input Capacitance
Maximum Three–State Output Capacitance
(Output in High–Impedance State)
MC74HC253
VCC
V
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
—
—
Guaranteed Limit
v v – 55 to
25_C
85_C
125_C Unit
140
175
210
ns
28
35
42
24
30
36
175
220
265
ns
35
44
53
30
37
45
150
190
225
ns
30
38
45
26
33
38
100
125
150
ns
20
25
30
17
21
26
75
95
110
ns
15
19
22
13
16
19
10
10
10
pF
15
15
15
pF
1. For propagation delays with loads other than 50 pF, see Chapter 2 of the Motorola High–Speed CMOS Data Book (DL129/D).
2. Information on typical parametric values can be found in Chapter 2 of the Motorola High–Speed CMOS Data Book (DL129/D).
Typical @ 25°C, VCC = 5.0 V
CPD
Power Dissipation Capacitance (Per Multiplexer)*
31
pF
* Used to determine the no–load dynamic power consumption: PD = CPD VCC2f + ICC VCC. For load considerations, see Chapter 2 of the
Motorola High–Speed CMOS Data Book (DL129/D).
tr
A OR D
tPHL
Y
90%
50%
10%
90%
50%
10%
tTLH
Figure 1.
SWITCHING WAVEFORMS
tf
VCC
GND
tPLH
tTHL
OUTPUT
ENABLE
Y
Y
50%
tPZL tPLZ
50%
tPZH tPHZ
50%
Figure 2.
VCC
GND
HIGH
IMPEDANCE
10% VOL
90% VOH
HIGH
IMPEDANCE
High–Speed CMOS Logic Data
3
DL129 — Rev 6
MOTOROLA
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