參數(shù)資料
型號(hào): MC74HC244ADWR2
廠商: ON SEMICONDUCTOR
元件分類: 通用總線功能
英文描述: NPN Epitaxial Silicon Transistor
中文描述: HC/UH SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDSO20
封裝: SOIC-20
文件頁數(shù): 3/7頁
文件大?。?/td> 258K
代理商: MC74HC244ADWR2
MC54/74HC244A
High–Speed CMOS Logic Data
DL129 — Rev 6
3
MOTOROLA
Vin = VIL or VIH
Leakage Current
Speed CMOS Data Book (DL129/D).
Symbol
Parameter
V
25 C
Unit
Maximum Propagation Delay, A to YA or B to YB
2.0
96
115
85 C
125 C
135
ns
tPHZ
(Figures 2 and 4)
4.5
22
33
6.0
19
28
28
tTLH,
Maximum Output Transition Time, Any Output
(Figures 1 and 3)
2.0
4.5
60
12
24
90
18
ns
75
High–Impedance State)
NOTE:For propagation delays with loads other than 50 pF, and information on typical parametric values, see Chapter 2 of the Motorola High–
CPD
Power Dissipation Capacitance (Per Buffer)*
* 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).
Typical @ 25
°
C, VCC = 5.0 V
34
pF
SWITCHING WAVEFORMS
Figure 1.
Figure 2.
VCC
GND
tf
tr
DATA INPUT
A OR B
OUTPUT
YA OR YB
10%
90%
10%
90%
tTLH
tPLH
tPHL
tTHL
ENABLE
A OR B
OUTPUT Y
OUTPUT Y
50%
50%
50%
90%
10%
tPZL
tPLZ
tPZH
tPHZ
VCC
GND
HIGH
IMPEDANCE
VOL
VOH
HIGH
IMPEDANCE
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