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74HC21 Datasheet(PDF) 6 Page - NXP Semiconductors

Part # 74HC21
Description  Dual 4-input AND gate
PDF  14 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

74HC21 Datasheet(HTML) 6 Page - NXP Semiconductors

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74HC21_5
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 7 May 2009
6 of 14
NXP Semiconductors
74HC21
Dual 4-input AND gate
11. Waveforms
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 7.
Waveforms showing the input (nA, nB, nC, nD) to output (nY) propagation delays and the output
transition times
001aab977
nA, nB, nC,
nD input
nY output
VM
VX
VI
tPHL
tTHL
tTLH
tPLH
VOH
VM
VY
VOL
GND
Table 8.
Measurement points
Type
Input
Output
VM
VM
VX
VY
74HC21
0.5VCC
0.5VCC
0.1VCC
0.9VCC



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