
September 1993
7
Philips Semiconductors
Product specification
5-Bit x 64-word FIFO register; 3-state
74HC/HCT7404
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF.
SYMBOL
PARAMETER
T
amb
°
C
UNIT
TEST CONDITION
+25
40 to +85
40 to +125
V
CC
(V)
WAVEFORMS
MIN
TYP
MAX
MIN
MAX
MIN
MAX
t
PHL
/t
PLH
propagation
delay
MR to DIR,
DOR
propagation
delay
MR to Q
n
propagation
delay
SI to DIR
propagation
delay
SO to DOR
propagation
delay
DOR to Q
n
propagation
delay
SO to Q
n
propagation
delay/ripple
through delay
SI to DOR
propagation
delay/bubble-up
delay SO to
DIR
3-state output
enable
OE to Q
n
3-state output
disable
OE to Q
n
output transition
time
69
25
20
210
42
36
265
53
45
315
63
54
ns
ns
ns
2.0
4.5
6.0
Fig.9
t
PHL
52
19
15
66
24
19
94
34
27
11
4
3
105
38
30
2.2
0.8
0.6
160
32
27
205
41
35
290
58
49
35
7
6.0
325
65
55
7.0
1.4
1.2
200
40
34
255
51
43
365
73
62
45
9
8
406
81
69
8.8
1.8
1.5
240
48
41
310
62
53
435
87
74
55
11
9
488
98
83
10.5
2.1
1.8
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
μ
s
μ
s
μ
s
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
Fig.9
t
PHL
/t
PLH
Fig.7
t
PHL
/t
PLH
Fig.10
t
PHL
/t
PLH
Fig.11
t
PHL
/t
PLH
Fig.15
t
PLH
Fig.16
t
PLH
2.8
1.0
0.8
9.0
1.8
1.5
11.2
2.2
1.9
13.5
2.7
2.3
μ
s
μ
s
μ
s
2.0
4.5
6.0
Fig.8
t
PZH
/t
PZL
35
7
6
70
14
12
44
16
13
50
18
14
14
5
4
11
4
3
22
8
6
150
30
26
150
30
26
60
12
10
45
9
8
90
18
15
190
38
32
190
38
33
75
15
13
55
11
9
105
21
18
225
45
38
225
45
38
90
18
15
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
Fig.17
t
PHZ
/t
PLZ
Fig.17
t
THL
/t
TLH
Fig.17
t
W
SI pulse width
HIGH or LOW
Fig.7
t
W
SO pulse width
HIGH or LOW
Fig.10