74LCX138DR2 데이터 시트보기 (PDF) - ON Semiconductor
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74LCX138DR2 Datasheet PDF : 8 Pages
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CAPACITIVE CHARACTERISTICS
Symbol
Parameter
CIN
COUT
CPD
Input Capacitance
Output Capacitance
Power Dissipation Capacitance
MC74LCX138
Condition
VCC = 3.3 V, VI = 0 V or VCC
VCC = 3.3 V, VI = 0 V or VCC
10 MHz, VCC = 3.3 V, VI = 0 V or VCC
Typical
Unit
7
pF
8
pF
25
pF
An, E3
Vmi
VCC
Vmi
tPHL
tPLH
0V
VOH
On
Vmo
Vmo
VOL
WAVEFORM 1: PROPAGATION DELAYS FOR INVERTING OUTPUTS
2.7 V
An, E1, E2 Vmi
Vmi
tPHL
On
Vmo
tPLH
0V
VOH
Vmo
VOL
WAVEFORM 2: PROPAGATION DELAYS FOR NON−INVERTING OUTPUTS
Symbol
Vmi
Vmo
3.3 V + 0.3 V
1.5 V
1.5 V
Vcc
2.7 V
1.5 V
1.5 V
2.5 V + 0.2 V
Vcc/2
Vcc/2
Figure 4. AC Waveforms
VCC
PULSE
GENERATOR
DUT
RT
CL
RL
CL = 50 pF at VCC = 3.3 + 0.3 V or equivalent (includes jig and probe capacitance)
CL = 30 pF at VCC = 2.5 + 0.2 V or equivalent (includes jig and probe capacitance)
RL = R1 = 500 W or equivalent
RT = ZOUT of pulse generator (typically 50 W)
Figure 5. Test Circuit
http://onsemi.com
5
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