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| 型號： | 933324260652 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 門電路 |
| 英文描述： | 4000/14000/40000 SERIES, HEX 1-INPUT INVERT GATE, PDIP14 |
| 封裝： | PLASTIC, SOT-27-1, DIP-14 |
| 文件頁數(shù)： | 6/7頁 |
| 文件大?。?/td> | 115K |
| 代理商： | 933324260652 |
December 1990
6
Philips Semiconductors
Product specication
Octal buffer/line driver; 3-state
74HC/HCT244
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (
ICC) for a unit load of 1 is given in the family specifications.
To determine
ICC per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr =tf = 6 ns; CL =50pF
INPUT
UNIT LOAD COEFFICIENT
1An
2An
1OE
2OE
0.70
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
1An to 1Yn;
2An to 2Yn
13
22
28
33
ns
4.5
Fig.5
tPZH/ tPZL
3-state output enable time
1OE to 1Yn;
2OE to 2Yn
15
30
38
45
ns
4.5
Fig.6
tPHZ/ tPLZ
3-state output disable time
1OE to 1Yn;
2OE to 2Yn
15
25
31
38
ns
4.5
Fig.6
tTHL/ tTLH
output transition time
5
12
15
18
ns
4.5
Fig.5
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