74HC21 Datasheet, PDF (6/14 Pages) NXP Semiconductors – Dual 4-input AND gate

NXP Semiconductors
11. Waveforms
74HC21
Dual 4-input AND gate
V_I
nA, nB, nC,
nD input
GND
V_OH
nY output
V_OL
V_M
t_PHL
V_Y
V_M
V_X
t_THL
t_PLH
t_TLH
001aab977
Fig 7.
Measurement points are given in Table 8.
V_OL and V_OH are typical voltage output levels that occur with the output load.
Waveforms showing the input (nA, nB, nC, nD) to output (nY) propagation delays and the output
transition times
Table 8.
Type
74HC21
Measurement points
Input
V_M
0.5V_CC
Output
V_M
0.5V_CC
V_X
0.1V_CC
V_Y
0.9V_CC
74HC21_5
Product data sheet
Rev. 05 — 7 May 2009
© NXP B.V. 2009. All rights reserved.
6 of 14