參數(shù)資料
型號(hào): MC74HCT244SD
廠商: Motorola, Inc.
英文描述: Octal 3-State Noninverting Buffer/Line Driver/Line Receiver with LSTTL-Compatible Inputs
中文描述: 八路三態(tài)同相緩沖器/線路驅(qū)動(dòng)器/線接收器的輸入通道兼容輸入
文件頁數(shù): 3/7頁
文件大?。?/td> 183K
代理商: MC74HCT244SD
MC54/74HCT244A
High–Speed CMOS Logic Data
DL129 — Rev 6
3
MOTOROLA
Vin = VIL or VIH
Leakage Current
NOTES:
1. Information on typical parametric values along with frequency or heavy load considerations can be found in Chapter 2 of the Motorola High–
Speed CMOS Data Book (DL129/D).
2. Total Supply Current = ICC +
Σ
ICC.
Current
Current
Current (per Package)
lout = 0
μ
A
Iout = 0
μ
A
5 5
5.5
Maximum Quiescent Supply
Vin = VCC or GND
A
2.9
2.4
mA
AC ELECTRICAL CHARACTERISTICS
(VCC = 5.0 V
±
10%, CL = 50 pF, Input tr = tf = 6 ns)
Symbol
b l
Parameter
U i
Speed CMOS Data Book (DL129/D).
tPLH,
Maximum Propagation Delay, A to YA or B to YB
tPHZ
(Figures 2 and 4)
20
12
25 C
25
15
85 C
30
18
ns
ns
(Figures 2 and 4)
tPZH
Maximum Output Transition Time, Any Output
tPZL,
Maximum Propagation Delay, Output Enable to YA or YB
22
28
33
ns
CPD
Power Dissipation Capacitance (Per Enabled Output)*
* 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).
bl d O
Typical @ 25
°
C, VCC = 5.0 V
55
pF
SWITCHING WAVEFORMS
Figure 1.
Figure 2.
3 V
GND
tf
tr
INPUT
A OR B
OUTPUT
YA OR YB
0.3 V
2.7 V
10%
190%
tTLH
tPLH
tPHL
tTHL
ENABLE
A OR B
OUTPUT Y
OUTPUT Y
1.3 V
1.3 V
1.3 V
90%
10%
tPZL
tPLZ
tPZH
tPHZ
3 V
GND
HIGH
IMPEDANCE
VOL
VOH
HIGH
IMPEDANCE
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