MC74LCX646 查看數據表（PDF） - ON Semiconductor
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MC74LCX646 Datasheet PDF : 10 Pages
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MC74LCX646
CAPACITIVE CHARACTERISTICS
Symbol
Parameter
Condition
Typical
Unit
CIN
Input Capacitance
VCC = 3.3 V, VI = 0 V or VCC
7
pF
CI/O
Input/Output Capacitance
VCC = 3.3 V, VI = 0 V or VCC
8
pF
CPD
Power Dissipation Capacitance
10MHz, VCC = 3.3 V, VI = 0 V or VCC
25
pF
2.7 V
An, Bn,
1.5 V
SBA, SAB
0V
tPLH, tPHL
VOH
Bn, An
1.5 V
VOL
WAVEFORM 1 − SAB to B and SBA to A, An to Bn PROPAGATION DELAYS
tR = tF = 2.5 ns, 10% to 90%; f = 1 MHz; tW = 500 ns
OE
1.5 V
DIR
tPZH
An, Bn
1.5 V
tPHZ
1.5 V
2.7 V
0V
VOH − 0.3 V
≈0V
tPZL
tPLZ
≈ 3.0 V
An, Bn
1.5 V
VOL + 0.3 V
WAVEFORM 2 − OE/DIR to An/Bn OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.5 ns, 10% to 90%; f = 1 MHz; tW = 500 ns
Figure 3. AC Waveforms
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