HD74HC299 데이터 시트보기 (PDF) - Renesas Electronics
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HD74HC299 Datasheet PDF : 9 Pages
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HD74HC299
• Waveform – 2
tr
tf
90 % 90 %
VCC
Clock
50 %
10 %
10 %
0V
tr
tf
90 % 90 %
VCC
S0, S1
50 %
50 %
50 %
50 %
10 %
10 %
0V
tsu th
VIH
A to H
50 %
50 %
VIL
QA to QH
VOH
VOL
A to H enabled A to H disabled A to H enabled A to H disabled
QA to QH disabled QA to QH enabled QA to QH disabled QA to QH enabled
Note : 1. Input pulse : PRR ≤ 1 MHz, Zo = 50 Ω, tr ≤ 6 ns, tf ≤ 6 ns
• Waveform – 3
tf
tr
90 %
90 %
VCC
G1, G2
50 %
50 %
10 %
10 %
0V
tZL
tLZ
Waveform - A
50 %
tZH
10 %
tHZ
VOH
VOL
Waveform - B
50 %
90 %
VOH
VOL
Notes : 1. Input waveform : PRR ≤ 1 MHz, duty cycle 50%, tr ≤ 6 ns, tf ≤ 6 ns
2. Waveform– A is for an output with internal conditions such that the
output is low except when disabled by the output control.
3. Waveform– B is for an output with internal conditions such that the
output is high except when disabled by the output control.
4. The output are measured one at a time with one transition per measurement.
Rev.2.00 Jan 31, 2006 page 7 of 8
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