74HCT244BQ 데이터 시트보기 (PDF) - Philips Electronics
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74HCT244BQ Datasheet PDF : 7 Pages
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Philips Semiconductors
Octal buffer/line driver; 3-state
Product specification
74HC/HCT244
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
ICC category: MSI
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
1An to 1Yn;
2An to 2Yn
30 110
145
165 ns 2.0 Fig.5
11 22
28
33
4.5
9 19
24
28
6.0
tPZH/ tPZL 3-state output enable time
36 150
190
225 ns 2.0 Fig.6
1OE to 1Yn;
13 30
38
45
4.5
2OE to 2Yn
10 26
33
38
6.0
tPHZ/ tPLZ 3-state output disable time
39 150
190
225 ns 2.0 Fig.6
1OE to 1Yn;
14 30
38
45
4.5
2OE to 2Yn
11 26
33
38
6.0
tTHL/ tTLH output transition time
14 60
75
90 ns 2.0 Fig.5
5 12
15
18
4.5
4 10
13
15
6.0
December 1990
5
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