74HC244(2016) 查看數據表（PDF） - NXP Semiconductors.
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74HC244 Datasheet PDF : 17 Pages
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Nexperia
11. Waveforms
74HC244; 74HCT244
Octal buffer/line driver; 3-state
9,
Q$QLQSXW
*1'
92+
Q<QRXWSXW
92/
90
W 3+/
90
W 7+/
90
W3/+
90
W 7/+
DDH
Fig 6.
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Input (nAn) to output (nYn) propagation delays and output transition times
9,
Q2(LQSXW
*1'
9&&
Q<QRXWSXW
/2: WR 2))
2)) WR /2:
92/
92+
Q<QRXWSXW
+,*+ WR 2))
2)) WR +,*+
*1'
90
W 3/=
W 3=/
W 3+=
9;
9<
RXWSXWV
HQDEOHG
90
W 3=+
90
RXWSXWV
GLVDEOHG
RXWSXWV
HQDEOHG
DDH
Fig 7.
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
3-state enable and disable times
Table 8. Measurement points
Type
Input
74HC244
VM
0.5 VCC
74HCT244
1.3 V
Output
VM
0.5 VCC
1.3 V
VX
0.1 VCC
0.1 VCC
VY
0.9 VCC
0.9 VCC
74HC_HCT244
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 5 — 26 February 2016
© Nexperia B.V. 2017. All rights reserved
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