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參數(shù)資料
| 型號： | HC646 |
| 廠商： | 意法半導體 |
| 英文描述： | HC648 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE, INV. HC646 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE |
| 中文描述： | HC648八路總線收發(fā)器/注冊三態(tài)，刑事調查。 HC646八路總線收發(fā)器/注冊三態(tài) |
| 文件頁數(shù)： | 11/12頁 |
| 文件大小： | 91K |
| 代理商： | HC646 |
September 1993
8
Philips Semiconductors
Product specication
Octal bus transceiver/register; 3-state
74HC/HCT646
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr =tf = 6 ns; CL =50pF
SYMBOL
PARAMETER
Tamb (°C)
UNIT
TEST CONDITIONS
74HCT
VCC
(V)
WAVEFORMS
+25
40 to +85 40 to +125
min.
typ.
max. min. max. min.
max.
tPHL/ tPLH
propagation delay
An,Bn to Bn,An
16
30
38
45
ns
4.5
Fig.6
tPHL/ tPLH
propagation delay
CPAB,CPBA to Bn,An
23
44
55
66
ns
4.5
Fig.7
tPHL/ tPLH
propagation delay
SAB,SBA to Bn,An
26
46
58
69
ns
4.5
Fig.8
tPZH/ tPZL
3-state output enable time
OE to An,Bn
21
40
50
60
ns
4.5
Fig.9
tPHZ/ tPLZ
3-state output disable time
OE to An,Bn
20
35
44
53
ns
4.5
Fig.9
tPZH/ tPZL
3-state output enable time
DIR to An,Bn
21
40
50
60
ns
4.5
Fig.10
tPHZ/ tPLZ
3-state output disable time
DIR to An,Bn
21
35
44
53
ns
4.5
Fig.10
tTHL/ tTLH
output transition time
5
12
15
18
ns
4.5
Fig.6 and Fig.8
tW
clock pulse width
HIGH or LOW
CPAB or CPBA
16
8
20
24
ns
4.5
Fig.7
tsu
set-up time
An,Bn to CPAB,CPBA
12
3
15
18
ns
4.5
Fig.7
th
hold time
An,Bn to CPAB,CPBA
5
1
5
ns
4.5
Fig.7
fmax
maximum clock pulse
frequency
30
77
24
20
MHz
4.5
Fig.7
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