參數(shù)資料
型號(hào): 74HCT244A
廠商: ON SEMICONDUCTOR
英文描述: Octal 3−State Noninverting Buffer/Line Driver/Line Receiver with LSTTL−Compatible Inputs
文件頁(yè)數(shù): 3/8頁(yè)
文件大小: 123K
代理商: 74HCT244A
MC74HCT244A
http://onsemi.com
3
AC ELECTRICAL CHARACTERISTICS
(V
= 5.0 V
±
10%, C
= 50 pF, Input t
= t
= 6 ns)
Semiconductor HighSpeed CMOS Data Book (DL129/D).
t
,
PHL
ns
ns
t
PLZ
,
Maximum Propagation Delay, Output Enable to YA or YB
26
33
39
t
PZH
(Figures 2 and 4)
ns
t
TLH
,
THL
ns
in
out
C
PD
Power Dissipation Capacitance (Per Enabled Output)*
* Used to determine the noload dynamic power consumption: P
D
= C
PD
V
CC2
f + I
CC
V
CC
. For load considerations, see Chapter 2 of the
ON Semiconductor HighSpeed CMOS Data Book (DL129/D).
Typical @ 25
°
C, V
CC
= 5.0 V
55
pF
SWITCHING WAVEFORMS
Figure 2.
Figure 3.
3 V
GND
t
f
t
r
INPUT
A OR B
OUTPUT
YA OR YB
0.3 V
1.3 V
2.7 V
10%
1.3 V
90%
t
TLH
t
PLH
t
PHL
t
THL
ENABLE
A OR B
OUTPUT Y
OUTPUT Y
1.3 V
1.3 V
1.3 V
90%
10%
t
PZL
t
PLZ
t
PZH
t
PHZ
3 V
GND
HIGH
IMPEDANCE
V
OL
V
OH
HIGH
IMPEDANCE
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參數(shù)描述
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