NL37WZ14
5. CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.
Average operating current can be obtained by the equation: ICC(OPR) = CPD VCC fin + ICC. CPD is used to determine the no−load dynamic
power consumption; PD = CPD VCC2 fin + ICC VCC.
OPEN
2 x VCC
GND
R1
DUT
RT
RL
OUTPUT
CL*
Test
Switch
Position
tPLH / tPHL Open
tPLZ / tPZL 2 x VCC
tPHZ / tPZH GND
X = Don’t Care
CL, pF
RL, W R1, W
See AC Characteristics Table
50
500 500
50
500 500
CL includes probe and jig capacitance
RT is ZOUT of pulse generator (typically 50 W)
f = 1 MHz
Figure 3. Test Circuit
tr = 3 ns
INPUT
10%
OUTPUT
OUTPUT
90%
Vmi
90%
Vmi
tf = 3 ns
VCC
10%
GND
tPHL
tPLH
VOH
Vmo
Vmo
tPLH
tPHL
VOL
VOH
Vmo
Vmo
VOL
INPUT
OUTPUT
OUTPUT
Vmi
tPZL
Vmo
tPZH
Vmo
Figure 4. Switching Waveforms
Vmi
tPLZ
VCC
GND
~VCC
VOL + VY
VOL
tPHZ
VOH
VOH − VY
~0 V
VCC, V
1.65 to 1.95
2.3 to 2.7
3.0 to 3.6
4.5 to 5.5
Vmi, V
VCC/2
VCC/2
VCC/2
VCC/2
tPLH, tPHL
(VOH − VOL)/2
(VOH − VOL)/2
(VOH − VOL)/2
(VOH − VOL)/2
Vmo, V
tPZL, tPLZ, tPZH, tPHZ
VCC/2
VCC/2
VCC/2
VCC/2
VY, V
0.15
0.15
0.3
0.3
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