74HC648 Просмотр технического описания (PDF) - Philips Electronics
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74HC648 Datasheet PDF : 12 Pages
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Philips Semiconductors
Octal bus transceiver/register; 3-state;
inverting
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
ICC category: MSI
Product specification
74HC/HCT648
AC CHARACTERISTICS FOR 74HC
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
SYMBOL PARAMETER
74HC
+25
−40 to +85
−40 to +125
UNIT
VCC
(V)
WAVEFORMS
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
An, Bn to Bn, An
39 135
170
205 ns 2.0 Fig.6
14 27
34
41
4.5
11 23
29
35
6.0
tPHL/ tPLH propagation delay
74 230
290
345 ns 2.0 Fig.7
CPAB, CPBA to Bn, An
27 46
58
69
4.5
22 39
49
59
6.0
tPHL/ tPLH propagation delay
SAB, SBA to Bn, An
55 190
240
285 ns 2.0 Fig.8
20 38
48
57
4.5
16 32
41
48
6.0
tPZH/ tPZL 3-state output enable
52 175
220
265 ns 2.0 Fig.9
time OE to An, Bn
19 35
44
53
4.5
15 30
37
45
6.0
tPHZ/ tPLZ 3-state output disable
61 175
220
265 ns 2.0 Fig.9
time OE to An, Bn
22 35
44
53
4.5
18 30
37
45
6.0
tPZH/ tPZL 3-state output enable
52 175
220
265 ns 2.0 Fig.10
time DIR to An, Bn
19 35
44
53
4.5
15 30
37
45
6.0
tPHZ/ tPLZ 3-state output disable
55 175
220
265 ns 2.0 Fig.10
time DIR to An, Bn
20 35
44
53
4.5
16 30
37
45
6.0
tTHL/ tTLH output transition time
14 60
75
90 ns 2.0 Fig.6 and Fig.8
5 12
15
18
4.5
4 10
13
15
6.0
tW
clock pulse width
80 25
HIGH or LOW
16 9
CPAB or CPBA
14 7
100
120
20
24
17
20
ns 2.0 Fig.7
4.5
6.0
tsu
set-up time
An, Bn to CPAB, CPBA
60
12
10
0
0
0
75
90
15
18
13
15
2.0
ns 4.5 Fig.7
6.0
th
hold time
An, Bn to CPAB, CPBA
35
7
6
6
2
2
45
55
9
11
8
9
2.0
ns 4.5 Fig.7
6.0
fmax
maximum clock pulse
frequency
6.0
30
35
22
68
81
4.8
4.0
24
20
28
24
2.0
MHz 4.5
6.0
Fig.7
December 1990
6
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