參數(shù)資料
型號(hào): HC74HC444
廠商: Hitachi,Ltd.
英文描述: Quad. Tridirectional Bus Transceiver(with noninverted/inverted 3-state outputs)
中文描述: 四。 Tridirectional總線收發(fā)器(帶noninverted /倒三態(tài)輸出)
文件頁數(shù): 8/12頁
文件大?。?/td> 82K
代理商: HC74HC444
HD74HC442/HD74HC443HD74HC444
8
AC Characteristics
(C
L
= 50 pF, Input t
r
= t
f
= 6 ns)
Ta = 25
°
C
Ta = –40 to
+85
°
C
Item
Symbol
V
CC
(V)
2.0
Min Typ Max Min
Max
Unit
Test Conditions
Propagation delay t
PLH
time
200 —
250
ns
t
PHL
4.5
40
50
6.0
34
43
Output enable
t
ZH
t
ZL
2.0
150 —
190
ns
time
4.5
30
38
6.0
26
33
Output disable
t
HZ
t
LZ
2.0
150 —
190
ns
time
4.5
30
38
6.0
26
33
Output rise/fall
t
TLH
t
THL
2.0
60
75
ns
time
4.5
12
15
6.0
10
13
Input capacitance
Cin
5
10
10
pF
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