74HCT194D 查看數據表（PDF） - Philips Electronics
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74HCT194D Datasheet PDF : 11 Pages
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Philips Semiconductors
4-bit bidirectional universal shift register
Product specification
74HC/HCT194
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
SYMBOL PARAMETER
74HCT
+25
−40 to +85
min. typ. max. min. max.
tPHL/ tPLH propagation delay
CP to Qn
18 32
40
tPHL
propagation delay
MR to Qn
18 32
40
tTHL/ tTLH output transition time
7 15
19
TEST CONDITIONS
−40 to +125
UNIT
VCC
(V)
min. max.
WAVEFORMS
48 ns 4.5 Fig.7
48 ns 4.5 Fig.8
22 ns 4.5 Fig.7
tW
clock pulse width
16 7
HIGH or LOW
20
24
ns 4.5 Fig.7
tW
master reset pulse 16 7
width; LOW
20
24
ns 4.5 Fig.8
trem
removal time
MR to CP
12 6
15
18
ns 4.5 Fig.8
tsu
set-up time
Dn to CP
14 7
18
21
ns 4.5 Fig.9
tsu
set-up time
20 10
25
30
ns 4.5 Fig.10
S0, S1 to CP
tsu
set-up time
14
DSR, DSL to CP
18
21
ns 4.5 Fig.9
th
hold time
0 −7
0
0
ns 4.5 Fig.9
Dn to CP
th
hold time
0 −5
0
0
ns 4.5 Fig.10
S0, S1 to CP
th
hold time
0 −7
0
0
ns 4.5 Fig.9
DSR, DSL to CP
fmax
maximum clock pulse 30 70
24
20
MHz 4.5 Fig.7
frequency
December 1990
9
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