Power considerations when using CMOS and BiCMOS logic devices

INTEGRATED CIRCUITS
ABSTRACT
As general purpose components, logic devices are used at different
frequencies and power supply voltages in many different varieties of
applications. This large diversity has produced the need to express a
single parameter that can be used in determining the power
dissipation of a device in a given applications. This application note
describes different components of power dissipation and how they
may be calculated.
AN263
Power considerations when using
CMOS and BiCMOS logic devices
Michael Lyons
2002 Mar 01
Philips Semiconductors
Application note
Power considerations when using
CMOS and BiCMOS logic devices
Author:
AN263
Michael Lyons
INTRODUCTION
As general purpose components, logic devices are used at different frequencies and power supply voltages in
many different varieties of applications. This large diversity has produced the need to express a single parameter
that can be used in determining the power dissipation of a device in a given application.
This application note describes different components of power dissipation and how they may be calculated.
1.
1.1
STATIC CONSIDERATIONS
CMOS
When a CMOS device is not switching and the input levels are GND or VCC, the p-channel and n-channel
transistors do not conduct at the same time; no direct MOS transistor channel path exists between VCC & GND. In
practice however, thermally generated minority carriers, which are present in all reverse biased diode junctions,
allow a very small leakage current to flow between VCC and GND. As this leakage current is typically a few nA,
quiescent CMOS power dissipation is extremely low. Maximum quiescent power dissipation for the above
conditions is calculated as:
PD = VCC × ICC
(1)
Where:
ICC is specified in the device datasheet.
1.2
BiCMOS
In the case of BiCMOS devices; the current in the output bipolar stage is different when the output is set high or
low. This results in two datasheet specifications for quiescent current ICCL & ICCH. Quiescent power dissipation for
input levels of GND or VCC is calculated as:
PD = VCC × (n1ICCL + n2ICCH)/(n1 + n2)
Where:
n1
n2
1.3
(2)
is the number of outputs LOW
is the number of outputs HIGH
Input stage current due to GND < VI < VCC
In the case where the input levels of the device are not held at GND or VCC, a direct MOS transistor current path
can exist between VCC and GND; this leads to additional supply current through the input buffer stage of both
CMOS and BiCMOS devices, and additional power dissipation. In device datasheets this is represented as ∆ICC,
the additional current due to an input level other than VCC or GND. In the case of 5.5 V logic families this
parameter is generally measured at an input voltage of VCC – 2.1; in the case of 3.3 V logic families it’s measured
at an input voltage of VCC – 0.6 V. Static power dissipation is then calculated as:
PD = VCC × [(n1ICCL + n2ICCH)/(n1 + n2) + n∆ICC]
Where:
n
is the number of inputs at the intermediate level.
Note: For CMOS ICCL = ICCH = ICC, simplifying Equation (3).
Table 1 shows a comparison of ICC and ∆ICC for the ‘244 function of several logic families.
2002 Mar 01
2
(3)
Philips Semiconductors
Application note
Power considerations when using
CMOS and BiCMOS logic devices
AN263
Table 1. Specified ICC and ∆ICC for CMOS and BiCMOS families
CMOS families
Device
Voltage
ICCQ
VI
∆ICC
Units
74HC244
6V
80
VCC–2.1 V
450
µA
74AHC244
5.5 V
40
VCC–2.1 V
1500
µA
74LV244
5.5 V
20
VCC–0.6 V
500
µA
74LVC244
3.6 V
10
VCC–0.6 V
500
µA
74ALVC244
3.6 V
10
VCC–0.6 V
750
µA
BiCMOS families
2.
Device
Voltage
ICCZ
ICCL
ICCH
VI
∆ICC
Units
74ABT244
5.5 V
0.25
30
0.25
VCC–2.1 V
1.5
mA
74LVT244
3.6 V
0.19
12
0.19
VCC–0.6 V
0.2
mA
DYNAMIC CONSIDERATIONS
When a device is clocked, power is dissipated through the charging and discharging of on-chip parasitic and load
capacitances. Power is also dissipated at the moment the output switches when both the p-channel and the
n-channel transistors are partially conducting. This transient energy loss is typically only 10% of that due to
parasitic capacitance.
The total dynamic power dissipation per device is:
PD = Σ(CPDVCC2 fI) + Σ(CLVCC2 fO)
Where:
CPD
fI
fO
CL
(4)
is the power dissipation capacitance per buffer
is the input frequency
is the output frequency
is the total external load capacitance per output.
It should be noted from the Equation (4), that CPD is a useful parameter for determining power dissipation in any
device for which power dissipation is a linear function of frequency. Figure 1 shows ICC as a function of frequency
for the devices listed in Table 1. From this we can conclude that for all of Philips’ CMOS and BiCMOS logic families
CPD can be used in order to determine the worst case power consumption of a device in a given application.
PD versus Frequency ’244 function
350
AHC
PD (mW)
300
LV
250
LVC
200
ALVC
150
LVT
100
ABT
50
HC
0
10
20
30
40
50
60
70
80
90
100
Frequency (MHz)
SW01041
Figure 1. Power dissipation as a function of frequency.
2002 Mar 01
3
Philips Semiconductors
Application note
Power considerations when using
CMOS and BiCMOS logic devices
2.1
AN263
Duty cycle considerations with unbalanced outputs
In the case of unbalanced output drive, such as is found in BiCMOS, the output duty cycle could also be
considered. Figure 2 shows the effect of duty cycle on the power dissipation of the 74LVT244. It can be concluded
from these measurements that the duty cycle has little effect on the total power dissipation. This is due to the
switching currents within BiCMOS products being more dominant than steady state currents.
74LVT244 duty cycle measurements
ICC(ave) versus Frequency
40
35
Icc(ave) (mA)
30
25
30%
20
70%
15
10
5
0
0
20
40
60
80
Frequency (MHz)
100
SW01042
Figure 2. Effect of duty cycle on Average current versus Frequency.
2.2
Power dissipation due to slow input rise/fall times
When an output stage switches, there is a brief period when both output transistors conduct. The resulting
through-current is additional to the normal supply current and causes power dissipation to increase linearly with the
input rise or fall time. As long as the input voltage is less than the n-channel transistor threshold voltage, or is
higher than VCC minus the p-channel transistor threshold voltage, one of the input transistors is always off and
there is no through-current. When the input voltage equals the n-channel transistor threshold voltage (typ. 0.7 V),
the n-channel transistor starts to conduct and through-current flows, reaching a maximum at VI = 0.5 VCC. For
devices with CMOS inputs, the maximum current is determined by the geometry of the input transistors. When
Schmitt triggers are used to square pulses with long rise/fall times, through-current at the Schmitt-trigger inputs will
increase the power dissipation (see Schmitt-trigger data sheets).
2002 Mar 01
4
Philips Semiconductors
Application note
Power considerations when using
CMOS and BiCMOS logic devices
3.
AN263
POWER DISSIPATION CAPACITANCE
CPD is specified in the CMOS device data sheets, the published values being calculated from the results of tests
described in this section. The test set-up is shown in Figure 3. The worst-case operating conditions for CPD are
always chosen and the maximum number of internal and output circuits are toggled simultaneously, within the
constraints listed in the data sheet. Appendix 1 gives the pin status for devices during a CPD test. Devices that
can be separated into independent sections are measured per section, the others are measured per device.
The recommended test frequency for determining CPD is 10 MHz, 50% duty cycle. Loading the switched outputs
gives a more realistic value of CPD, because it prevents transient through-current in the output stages.
The values of CPD provided in datasheets have been calculated using:
C PD +
Where:
CPD
ICC(ave)
VCC
CL
fO
fI
ISTAT
(I CC(ave)
=
=
=
=
=
=
=
V CC) * [(C L V CC2
V CC2 f I
f O) ) V CC
I STAT]
(5)
power dissipation capacitance (per buffer)
supply current
supply voltage
output load capacitance
output frequency
input frequency
supply current at dc (approx. zero for CMOS)
VCC(max)
ICC(ave)
nA
0.1 µF
INPUT
DEVICE
UNDER
TEST
10 µF
OUTPUT
CL = 50 pF
SW01043
Figure 3. Test set-up for CPD determination.
2002 Mar 01
5
Philips Semiconductors
Application note
Power considerations when using
CMOS and BiCMOS logic devices
3.1
AN263
Example CPD calculations
CMOS:
In the case of 74LVC244, ISTAT is negligible and can be considered as zero for the purpose of CPD calculation. The
test set-up for the ’244 as indicated in Appendix 1 was used, with the load shown in Figure 3. At VCC = 3.6 V,
fI = 10 MHz; ICC(ave) was found to be 2.24 mA.
Using Equation (5):
C PD +
(2.24 mA
3.6 V) * [(50 pF 3.6 V 2
3.6 V 2 10 MHz
10 MHz) ) 0 mW]
CPD = 12.2 pF
BiCMOS:
In the case of 74LVT244, ISTAT cannot be considered as negligible at low frequency. As a result, a higher
frequency is recommended for modeling its CPD. The test set-up for the ’244 as indicated in Appendix 1 was used
to perform a measurement, with the same load shown in Figure 3, however at a frequency of 30 MHz. ICC(ave) was
found to be 11.53 mA. We then apply Equation (5) with the assumption that ISTAT is negligible.
Using Equation (5):
C PD +
(11.53 mA
3.6 V) * (50 pF 3.6 V 2
3.6 V 2 30 MHz
30 MHz)
CPD = 56.8 pF
Note: Performing the measurement and calculation at 20 MHz results in a CPD of 66 pF. Due to the uncertainty of
ISTAT in a given configuration, it is recommended that a 5 to 10% guardband is used when approximating power
dissipation for BiCMOS devices.
4.
4.1
USING CPD TO CALCULATE POWER DISSIPATION
CMOS Device Calculation
Consider a 3.6 V application in which every 40 ms a 74LVC244A device is used to buffer four 40 MHz,
75% positive duty cycle signals and two 80 MHz, 75% positive duty cycle signals, for a duration of 25 ms. The
unused inputs are tied to 3.6 V, the outputs drive 30 pF loads, and when not buffering, four inputs are held at 3.0 V
and two inputs held at GND.
In calculating the average power dissipation we need to consider both the power dissipation for the 15 ms when
the device is not buffering, and the power dissipation for the 25 ms when the buffers are active.
In the first 15 ms the device is static and power dissipation is calculated using Equation (2). In this case we have
four inputs that are connected to VCC – 0.6 V.
PD1
= 3.6 × 10 µA + 4 × 3.6 × 500 µA
= 7.24 mW
In the second 25 ms the total power dissipation can be estimated as the combination of static the dynamic
dissipation due to the four buffers and outputs switching at 40 MHz, and dynamic dissipation due to the two buffers
and outputs switching at 80 MHz.
PD2
= 4 × (CPD + CL) × 3.62 × 40 MHz + 2 × (CPD + CL) × 3.62 × 80 MHz
= 87.1 mW + 87.1 mW
= 174.2 mW
The average power dissipation is then:
PD(ave) = (15 × 7.24 mW + 25 × 174.2 mW) / 40
= 111.6 mW
2002 Mar 01
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Philips Semiconductors
Application note
Power considerations when using
CMOS and BiCMOS logic devices
4.2
AN263
BiCMOS Device Calculation
Consider the LVT244 in the same application.
In the case of BiCMOS devices, the duty cycle must be taken into consideration because ICCL and ICCH are not
identical. In the first 15 ms of the application the static power dissipation is calculated using Equation (2) to
determine quiescent power dissipation and adding the power dissipation caused by the four inputs that are
connected to VCC – 0.6 V.
PD1
= 3.6 × (6 × ICCH + 2 × ICCL) / 8 + 4 × 3.6 × ∆ICC
= 11.3 mW + 2.9 mW
= 14.2 mW
The power dissipation in the next 25 ms contains in addition to those of the 74LVC244A case the component ISTAT.
PD1 can be used to approximate ISTAT.
PD2
= 4 × (CPD + CL) × 3.62 × 40 MHz + 2 × (CPD + CL) × 3.62 × 80 MHz + 3.6 × ISTAT
= 180 mW + 180 mW + 14.2 mW
= 374.2 mW
It should be noted that in using equation 3 to determine our dynamic dissipation components we are assuming a
rail to rail output swing. As BiCMOS outputs don’t swing rail to rail this will produce a worse case approximation.
The calculated average power dissipation is then:
PD(ave) = (15 × 14.2mW + 25 × 374.2 mW) / 40
= 239.2 mW
RESULTS AND CONCLUSION
Table 2. Comparison of measured and calculated results
Static 15 ms
Device
ICC(ave)
(mA)
Dynamic 25 ms
PD1 (mW)
Measured Calculated
Total
PD2 (mW)
ICC(ave)
(mA)
Measured
PD(ave) (mW)
Calculated Measured
Calculated
74LCV244A
0.008
0.028
7.24
48.2
173.5
174.2
108.4
111.6
74LVT244
2.5
9
14.2
102.4
368.6
374.2
233.8
239.2
Determination of power dissipation is an essential part of system design. By understanding the static and dynamic
components of power dissipation, and how they can be modeled; a system designer is able to estimate the worse
case power dissipation of an application.
Table 2 shows the comparison of the measured results to those calculated. The values of static and dynamic
current that were calculated are within 10% of the measured values. Importantly the calculated values are higher
than the measured values. This is due to the calculations being made with worse case datasheet limits. This is
considered advantageous in system level power calculations, as it provides extra power budget margin in the
application. It can be concluded, from the examples presented, that any device that has a linear relationship
between supply current and frequency can be modeled as a single power dissipation capacitance CPD for the
purpose of power dissipation calculations of that device used in any application.
REFERENCES
[1]
HCMOS users guide, January 1986.
[2]
AN241: Thermal Considerations for Advanced Logic Families, June 1992.
2002 Mar 01
7
Philips Semiconductors
Application note
Power considerations when using
CMOS and BiCMOS logic devices
APPENDIX 1:
AN263
CONDITIONS FOR CPD TESTS
Gates. All inputs except one are held at either VCC or GND, depending on which state causes the output to toggle.
The remaining input is toggled at a known frequency. CPD is specified per-gate.
Decoders. One input is toggled, causing the outputs to toggle at the same rate (normally one of the address-select
pins is switched while the decoder is enabled). All other inputs are tied to VCC or GND, whichever enables
operation. CPD is specified per-independent-decoder.
Multiplexers. One data input is tied HIGH and the other is tied LOW. The address-select and enable inputs are
configured such that toggling one address input selects the two data inputs alternately, causing the outputs to
toggle. With 3-State multiplexers, CPD is specified per output function for enabled outputs.
Bilateral switches. The switch inputs and outputs are open-circuit. With the enable input active, one of the select
inputs is toggled, the others are tied HIGH or LOW. CPD is specified per switch.
3-State buffers and transceivers. CPD is specified per buffer with the outputs enabled. Measurement is as for
simple gates.
Latches. The device is clocked and data is toggled on alternate clock pulses. Other preset or clear inputs are held
so that output toggling is enabled. If the device has common-locking latches, one latch is toggled by the clock.
3-State latches are measured with their outputs enabled. CPD is specified per-latch.
Flip-flops. Measurement is performed as for latches. The inputs to the device are toggled and any preset or clear
inputs are held inactive.
Shift registers. The register is clocked and the serial data input is toggled at alternate clock pulses (as described
for latches). Clear and load inputs are held inactive and parallel data are held at VCC or GND. 3-State devices are
measured with outputs enabled. If the device is for parallel loading only, it is loaded with 101010..., clocked to shift
the data out and then reloaded.
Counters. A signal is applied to the clock input but other clear or load inputs are held inactive. Separate values for
CPD are given for each counter in the device.
Arithmetic circuits. Adders, magnitude comparators, encoders, parity generators, ALUs and miscellaneous
circuits are exercised to obtain the maximum number of simultaneously toggling outputs when toggling only one or
two inputs.
Display drivers. CPD is not normally required for LED drivers because LEDs consume so much power as to make
the effect of CPD negligible. Moreover, when blanked, the drivers are rarely driven at significant speeds. When it is
needed, CPD is measured with outputs enabled and disabled while toggling between lamp test and blank (if
provided), or between a display of numbers 6 and 7.
LCD drivers are tested by toggling the phase inputs that control the segment and backplane waveforms outputs. If
either type of driver (LCD or LED) has latched inputs, then the latches are set to a flow-through mode.
One-shot circuits. In some cases, when the device ICC is significant, CPD is not specified. When it is specified,
CPD is measured by toggling one trigger input to make the output a square wave. The timing resistor is tied to a
separate supply (equal to VCC) to eliminate its power contribution.
2002 Mar 01
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Philips Semiconductors
Application note
Power considerations when using
CMOS and BiCMOS logic devices
AN263
Pin conditions for CPD tests
Function
Pin Number
14 15 16
1
2
3
4
5
6
7
8
9
10
11
12
13
17
18
19
20
21
22
23
24
25
26
27
28
00
02
03
04
U04
P
C
P
P
P
H
P
H
C
C
C
L
B
D
D
D
O
D
O
O
D
D
D
D
D
O
D
O
O
O
G
G
G
G
G
O
D
O
O
O
D
D
D
D
D
D
O
D
O
O
O
D
O
D
D
D
D
D
O
O
D
O
D
D
D
V
V
V
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
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–
–
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–
–
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–
–
–
–
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–
–
–
–
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–
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–
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–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
08
10
11
14
20
P
P
P
P
P
H
H
H
C
H
C
D
D
D
O
D
D
D
O
H
D
D
D
D
H
O
O
O
O
C
G
G
G
G
G
O
O
O
O
O
D
D
D
D
D
D
D
D
O
D
O
D
D
D
O
D
C
C
O
D
D
H
H
D
D
V
V
V
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
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–
–
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–
–
–
–
–
–
–
–
–
–
–
–
–
21
27
30
32
42
P
P
P
P
C
H
L
H
L
C
O
D
H
C
O
H
D
H
D
O
H
D
H
D
O
C
O
H
O
O
G
G
G
G
O
O
O
C
O
G
D
D
O
D
O
D
D
O
D
O
O
D
H
O
O
D
C
H
D
L
D
L
O
D
L
V
V
V
V
L
–
–
–
–
P
–
–
–
–
V
–
–
–
–
–
–
–
–
–
–
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–
–
–
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–
–
–
–
–
–
–
–
58
73
74
75
85
P
P
H
C
L
D
H
Q
Q
H
D
H
P
D
P
D
V
H
D
H
D
D
C
V
O
O
D
C
D
C
G
D
G
D
O
O
O
O
O
G
L
O
O
O
L
L
D
D
O
L
L
G
D
O
L
H
C
D
G
L
H
C
D
P
L
V
H
V
O
L
–
–
–
O
L
–
–
–
C
V
–
–
–
–
–
–
–
–
–
–
–
–
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–
86
93
107
109
112
P
Q
H
H
P
L
L
C
H
H
C
L
C
L
H
D
D
H
P
H
D
V
O
H
C
O
D
O
C
C
G
D
G
C
O
O
C
D
G
G
D
C
D
O
O
D
G
D
O
D
O
C
D
D
D
D
C
P
D
D
D
D
H
D
D
V
P
V
D
D
–
–
–
D
H
–
–
–
V
V
–
–
–
–
–
–
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–
123
125
126
132
137
L
L
H
P
P
H
P
P
H
L
P
C
C
C
L
C
D
D
D
L
O
D
D
D
L
O
O
O
O
H
O
G
G
G
O
G
O
O
O
G
D
D
D
D
O
D
D
D
D
O
D
O
O
O
O
O
D
D
D
O
C
D
D
D
O
O
V
V
V
C
R
–
–
–
C
V
–
–
–
V
–
–
–
–
–
–
–
–
–
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–
–
–
–
–
–
–
–
–
–
138
139
147
151
153
P
L
H
D
L
L
P
H
D
L
L
L
H
L
D
L
C
H
H
D
L
C
H
C
L
H
O
O
C
H
O
O
O
L
C
G
G
G
G
G
O
O
C
L
O
O
O
H
L
D
O
O
P
P
D
O
O
H
D
D
O
D
H
D
D
C
D
O
D
P
C
D
O
D
D
V
V
V
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
154
157
158
160
161
C
P
P
H
H
C
L
L
P
P
O
H
H
D
D
O
C
C
D
D
O
L
L
D
D
O
L
L
D
D
O
O
O
H
H
O
G
G
G
G
O
O
O
H
H
O
L
L
H
H
O
L
L
C
C
G
O
O
C
C
O
L
L
C
C
O
L
L
C
C
O
L
L
C
C
O
V
V
V
V
O
–
–
–
–
L
–
–
–
–
L
–
–
–
–
L
–
–
–
–
L
–
–
–
–
L
–
–
–
–
P
–
–
–
–
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
162
163
164
165
166
H
H
Q
H
Q
P
P
H
P
D
D
D
C
D
D
D
D
C
D
D
D
D
C
D
D
D
D
C
D
L
H
H
G
C
P
G
G
P
G
G
H
H
H
C
H
H
H
C
Q
D
C
C
C
D
D
C
C
C
D
D
C
C
C
D
C
C
C
V
D
D
C
C
–
L
H
V
V
–
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
173
174
175
181
182
L
H
H
P
H
L
C
C
H
L
C
Q
C
H
H
O
D
Q
L
L
O
O
D
L
H
O
D
O
H
L
P
O
O
H
O
G
G
G
L
G
L
P
P
C
C
L
O
O
C
O
D
D
O
C
C
D
O
D
G
C
D
D
D
C
P
Q
D
O
B
H
L
O
O
C
L
V
V
V
C
V
–
–
–
C
–
–
–
–
L
–
–
–
–
H
–
–
–
–
L
–
–
–
–
H
–
–
–
–
L
–
–
–
–
H
–
–
–
–
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
190
191
192
193
194
D
D
D
D
H
C
C
C
C
Q
C
C
C
C
D
L
L
H
H
D
L
L
P
P
D
C
C
C
C
D
C
C
C
C
D
G
G
G
G
G
D
D
D
D
H
D
D
D
D
L
H
H
H
H
P
C
C
C
C
C
C
C
C
C
C
P
P
L
L
C
D
D
D
D
C
V
V
V
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
195
221
237
238
240
H
L
P
P
L
H
H
L
L
P
L
P
L
L
O
D
C
L
L
D
D
O
L
L
O
D
O
H
H
D
D
O
O
O
O
G
G
G
G
D
H
D
O
O
O
P
D
O
O
G
C
D
O
O
D
C
O
O
O
O
C
C
O
O
D
C
O
C
C
O
C
R
C
C
D
V
V
V
V
O
–
–
–
–
D
–
–
–
–
C
–
–
–
–
D
–
–
–
–
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
2002 Mar 01
9
Philips Semiconductors
Application note
Power considerations when using
CMOS and BiCMOS logic devices
AN263
Pin conditions for CPD tests (continued)
Function
Pin Number
14 15 16
1
2
3
4
5
6
7
8
9
10
11
12
13
17
18
19
20
21
22
23
24
25
26
27
28
241
242
243
244
245
L
L
L
L
H
P
O
O
P
P
O
P
P
O
D
D
D
D
D
D
O
D
D
O
D
D
D
D
D
D
O
G
G
O
D
D
O
O
D
D
O
O
O
O
D
G
O
O
G
G
D
C
C
D
O
O
O
O
O
O
D
L
L
D
O
O
V
V
O
O
D
–
–
D
O
O
–
–
O
O
D
–
–
D
O
C
–
–
C
C
H
–
–
D
L
V
–
–
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
251
253B
257
258
259
D
L
P
P
L
D
L
L
L
L
L
D
H
H
L
H
D
C
C
C
C
L
D
D
O
C
H
D
D
O
L
C
O
O
O
G
G
G
G
G
L
O
O
O
O
L
D
D
D
O
P
D
D
D
O
D
D
O
O
O
D
D
D
D
Q
D
P
D
D
P
D
D
L
L
H
V
V
V
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
7266
273
280
283
297
P
H
L
C
H
L
C
L
H
H
C
Q
O
L
H
O
D
L
C
P
D
O
C
P
Q
D
O
C
H
L
G
D
G
L
C
D
D
P
G
G
D
O
L
C
D
O
G
L
C
D
O
P
L
H
O
D
O
L
L
O
D
D
L
C
D
V
D
V
L
H
–
O
–
H
H
–
O
–
V
V
–
D
–
–
–
–
D
–
–
–
–
O
–
–
–
–
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
299
354
356
365
366
H
D
D
L
L
L
D
D
P
P
L
D
D
C
C
C
D
D
D
D
C
D
D
O
O
C
D
D
D
D
C
L
D
O
O
C
H
Q
G
G
H
L
P
O
O
G
G
G
D
D
Q
L
L
O
O
P
L
L
D
D
C
L
L
O
O
C
P
L
D
D
C
L
L
L
L
C
L
L
V
V
C
H
H
–
–
D
C
C
–
–
L
C
C
–
–
V
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
367
368
373
374
377
L
L
L
L
L
P
P
C
C
C
C
C
Q
Q
Q
D
D
D
D
D
O
O
O
O
O
D
D
O
O
O
O
O
D
D
D
G
G
D
D
D
O
O
O
O
O
D
D
G
G
G
O
O
P
P
P
D
D
O
O
O
O
O
D
D
D
D
D
D
D
D
L
L
O
O
O
V
V
O
O
O
–
–
D
D
D
–
–
D
D
D
–
–
O
O
O
–
–
V
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
390
393
423
533
534
P
P
L
L
L
L
L
P
C
C
C
C
H
Q
Q
Q
C
C
D
D
C
C
O
O
O
C
C
O
O
O
C
G
O
D
D
G
O
G
D
D
O
O
D
O
O
O
O
D
G
G
O
O
D
P
P
D
D
O
O
O
O
D
C
D
D
D
V
O
D
D
D
–
R
O
O
V
–
V
O
O
–
–
–
D
D
–
–
–
D
D
–
–
–
O
O
–
–
–
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
540
541
563
564
573
L
L
L
L
L
P
P
Q
Q
P
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
G
G
G
G
G
O
O
P
P
H
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
C
O
O
O
L
L
C
C
C
V
V
V
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
574
583
597
7597
640
L
H
D
D
H
Q
H
D
D
P
D
H
D
D
D
D
L
D
D
D
D
L
D
D
D
D
C
D
D
D
D
C
D
D
D
D
G
G
G
D
D
C
C
C
D
G
C
H
H
G
P
C
P
P
O
O
H
D
D
O
O
P
H
H
O
O
L
Q
Q
O
O
L
D
D
O
O
V
V
V
O
O
–
–
–
O
O
–
–
–
C
C
–
–
–
L
V
–
–
–
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
643
646
648
670
688
H
D
D
Q
L
P
L
L
Q
P
D
H
H
Q
L
D
P
P
L
L
D
D
D
P
L
D
D
D
C
L
D
D
D
C
L
D
D
D
G
L
D
D
D
C
L
G
D
D
C
G
O
D
D
L
L
O
G
G
L
L
O
O
O
L
L
O
O
O
P
L
O
O
O
Q
L
O
O
O
V
L
O
O
O
–
L
C
O
O
–
L
L
O
O
–
C
V
C
C
–
V
–
L
L
–
–
–
D
D
–
–
–
D
D
–
–
–
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
4002
4015
4016
4017
4020
C
P
O
C
C
P
C
O
C
C
L
O
O
C
C
L
O
O
C
C
L
O
D
C
C
O
D
D
C
C
G
D
G
C
C
O
G
O
G
G
D
D
O
C
C
D
O
O
C
P
D
C
O
C
L
D
C
D
C
C
O
C
P
L
C
V
L
V
P
C
–
Q
–
L
C
–
V
–
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
4024
4040
4046A
4049
4050
P
C
O
V
V
L
C
C
C
C
C
C
L
P
P
C
C
O
O
O
C
C
H
D
D
C
C
O
O
O
G
C
O
D
D
O
G
G
G
G
C
C
O
D
D
O
P
O
O
O
C
L
O
D
D
C
C
O
O
O
O
C
O
O
O
V
C
P
D
D
–
C
O
O
O
–
V
V
O
O
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
4051
4052
4053
4059
4060
O
O
O
P
C
O
O
O
D
C
O
O
O
H
C
O
O
O
L
C
O
O
O
L
C
L
L
L
L
C
G
G
G
L
C
G
G
G
L
G
L
L
L
L
C
L
P
L
L
C
P
O
P
H
P
O
O
O
G
L
O
O
O
H
C
O
O
O
H
C
O
O
O
L
C
V
V
V
L
V
–
–
–
L
–
–
–
–
L
–
–
–
–
L
–
–
–
–
L
–
–
–
–
L
–
–
–
–
L
–
–
–
–
C
–
–
–
–
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
2002 Mar 01
10
Philips Semiconductors
Application note
Power considerations when using
CMOS and BiCMOS logic devices
AN263
Pin conditions for CPD tests (continued)
Function
Pin Number
14 15 16
1
2
3
4
5
6
7
8
9
10
11
12
13
17
18
19
20
21
22
23
24
25
26
27
28
4066
4067
4075
4094
4316
O
O
P
H
O
O
O
L
Q
O
O
O
D
P
O
O
O
D
C
O
D
O
D
C
P
D
O
O
C
D
G
O
G
C
L
O
O
L
G
G
O
O
C
C
G
O
P
O
C
O
O
L
D
C
O
D
G
D
C
O
P
L
D
C
O
V
L
V
C
D
–
L
–
H
D
–
O
–
V
V
–
O
–
–
–
–
O
–
–
–
–
O
–
–
–
–
O
–
–
–
–
O
–
–
–
–
O
–
–
–
–
O
–
–
–
–
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
4351
4352
4353
4510
4511
O
O
O
L
L
O
O
O
C
L
O
O
O
D
H
O
O
O
D
H
O
O
O
L
L
O
O
O
C
L
L
L
L
C
P
H
H
H
G
G
G
G
G
L
C
G
G
G
H
C
H
H
H
C
O
P
P
P
D
O
L
L
L
D
C
O
O
O
C
O
L
O
L
P
C
O
O
O
V
V
O
O
O
–
–
O
O
O
–
–
O
O
O
–
–
V
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
4514
4515
4516
4518
4520
H
H
L
P
P
P
P
C
H
H
L
L
D
C
C
O
O
D
C
C
O
O
L
C
C
O
O
C
C
C
O
O
C
L
L
O
O
G
G
G
C
C
L
D
D
O
O
H
D
D
C
C
C
O
O
G
G
D
O
O
O
O
D
O
O
O
O
C
O
O
O
O
P
D
D
O
O
V
V
V
O
O
–
–
–
O
O
–
–
–
O
O
–
–
–
O
O
–
–
–
L
L
–
–
–
L
L
–
–
–
L
L
–
–
–
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
4538
4543
7030
7046A
40102
G
H
G
O
P
R
L
G
C
H
H
L
C
L
L
P
H
P
O
L
H
L
Q
H
L
C
P
Q
O
L
C
L
Q
O
L
G
G
Q
G
G
O
C
Q
O
H
O
C
Q
O
L
D
C
Q
O
L
D
C
Q
O
L
L
C
Q
O
L
O
C
G
P
C
G
C
L
O
H
V
V
C
V
V
–
–
C
–
–
–
–
C
–
–
–
–
C
–
–
–
–
C
–
–
–
–
C
–
–
–
–
C
–
–
–
–
C
–
–
–
–
C
–
–
–
–
C
–
–
–
–
P
–
–
–
–
H
–
–
–
–
V
–
–
40103
40104
40105
P
H
L
H
Q
C
L
D
P
L
D
Q
L
D
Q
L
D
Q
L
D
Q
G
G
G
H
H
L
L
L
C
L
P
C
L
C
C
L
C
C
C
C
C
H
C
P
V
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
2002 Mar 01
11
Philips Semiconductors
Application note
Power considerations when using
CMOS and BiCMOS logic devices
AN263
Pin conditions for CPD tests (continued)
Function
16240
16241
16244
16245
16260
16273
16373
16374
16500
16501
16540
16541
Pin Definition
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
L
29
C
30
O
31
G
32
O
33
O
34
V
35
O
36
O
37
G
38
O
39
O
40
O
41
O
42
G
43
O
44
O
45
V
46
O
47
O
48
G
49
O
50
O
51
D
52
D
53
D
54
D
55
G
56
D
1
D
2
V
3
D
4
D
5
G
6
D
7
D
8
D
9
D
10
G
11
D
12
D
13
V
14
D
15
D
16
G
17
D
18
P
19
D
20
–
21
–
22
–
23
–
24
–
25
–
26
–
27
–
28
L
29
C
30
O
31
G
32
O
33
O
34
V
35
O
36
O
37
G
38
O
39
O
40
O
41
O
42
G
43
O
44
O
45
V
46
O
47
O
48
G
49
O
50
O
51
D
52
D
53
D
54
D
55
G
56
D
1
D
2
V
3
D
4
D
5
G
6
D
7
D
8
D
9
D
10
G
11
D
12
D
13
V
14
D
15
D
16
G
17
D
18
P
19
D
20
–
21
–
22
–
23
–
24
–
25
–
26
–
27
–
28
L
29
C
30
O
31
G
32
O
33
O
34
V
35
O
36
O
37
G
38
O
39
O
40
O
41
O
42
G
43
O
44
O
45
V
46
O
47
O
48
D
1
D
2
V
3
D
4
D
5
G
6
D
7
D
8
D
9
D
10
G
11
D
12
D
13
V
14
D
15
D
16
G
17
D
18
P
19
D
20
G
49
–
–
21
O
50
–
–
22
O
51
–
–
23
D
52
–
–
24
D
53
–
–
25
D
54
–
–
26
D
55
–
–
27
G
56
–
–
28
L
29
P
30
D
31
G
32
D
33
D
34
V
35
D
36
D
37
G
38
D
39
D
40
D
41
D
42
G
43
D
44
D
45
V
46
D
47
D
48
O
1
O
2
V
3
O
4
O
5
G
6
O
7
O
8
O
9
O
10
G
11
O
12
O
13
V
14
O
15
O
16
G
17
O
18
C
19
L
20
G
49
–
–
21
D
50
–
–
22
D
51
–
–
23
D
52
–
–
24
D
53
–
–
25
O
54
–
–
26
O
55
–
–
27
G
56
–
–
28
L
29
H
30
D
31
G
32
D
33
D
34
V
35
C
36
O
37
O
38
G
39
O
40
O
41
O
42
O
43
O
44
O
45
G
46
O
47
O
48
O
49
V
50
P
51
D
52
G
53
D
54
H
55
H
56
H
1
D
2
D
3
G
4
D
5
D
6
V
7
D
8
D
9
D
10
G
11
D
12
D
13
D
14
D
15
D
16
D
17
G
18
D
19
D
20
D
21
V
22
D
23
D
24
G
25
D
26
D
27
H
28
H
29
C
30
O
31
G
32
O
33
O
34
V
35
O
36
O
37
G
38
O
39
O
40
O
41
O
42
G
43
O
44
O
45
V
46
O
47
O
48
D
1
D
2
V
3
D
4
D
5
G
6
D
7
D
8
D
9
D
10
G
11
D
12
D
13
V
14
D
15
D
16
G
17
D
18
Q
19
P
20
G
49
–
–
21
O
50
–
–
22
O
51
–
–
23
L
52
–
–
24
D
53
–
–
25
D
54
–
–
26
D
55
–
–
27
G
56
–
–
28
L
29
C
30
O
31
G
32
O
33
O
34
V
35
O
36
O
37
G
38
O
39
O
40
O
41
O
42
G
43
O
44
O
45
V
46
O
47
O
48
D
1
D
2
V
3
D
4
D
5
G
6
D
7
D
8
D
9
D
10
G
11
D
12
D
13
V
14
D
15
D
16
G
17
D
18
Q
19
P
20
G
49
–
–
21
O
50
–
–
22
O
51
–
–
23
D
52
–
–
24
D
53
–
–
25
D
54
–
–
26
D
55
–
–
27
G
56
–
–
28
L
29
C
30
O
31
G
32
O
33
O
34
V
35
O
36
O
37
G
38
O
39
O
40
O
41
O
42
G
43
O
44
O
45
V
46
O
47
O
48
D
1
D
2
V
3
D
4
D
5
G
6
D
7
D
8
D
9
D
10
G
11
D
12
D
13
V
14
D
15
D
16
G
17
D
18
Q
19
P
20
G
49
–
–
21
O
50
–
–
22
O
51
–
–
23
D
52
–
–
24
D
53
–
–
25
D
54
–
–
26
D
55
–
–
27
G
56
–
–
28
H
29
P
30
Q
31
G
32
D
33
D
34
V
35
D
36
D
37
D
38
G
39
D
40
D
41
D
42
D
43
D
44
D
45
G
46
D
47
D
48
D
49
V
50
D
51
D
52
G
53
D
54
H
55
L
56
G
1
D
2
O
3
G
4
O
5
O
6
V
7
O
8
O
9
O
10
G
11
O
12
O
13
O
14
O
15
O
16
O
17
G
18
O
19
O
20
O
21
V
22
O
23
O
24
G
25
C
26
D
27
G
28
H
29
P
30
Q
31
G
32
D
33
D
34
V
35
D
36
D
37
D
38
G
39
D
40
D
41
D
42
D
43
D
44
D
45
G
46
D
47
D
48
D
49
V
50
D
51
D
52
G
53
D
54
H
55
L
56
G
1
D
2
O
3
G
4
O
5
O
6
V
7
O
8
O
9
O
10
G
11
O
12
O
13
O
14
O
15
O
16
O
17
G
18
O
19
O
20
O
21
V
22
O
23
O
24
G
25
C
26
D
27
G
28
L
29
C
30
O
31
G
32
O
33
O
34
V
35
O
36
O
37
G
38
O
39
O
40
O
41
O
42
G
43
O
44
O
45
V
46
O
47
O
48
D
1
D
2
V
3
D
4
D
5
G
6
D
7
D
8
D
9
D
10
G
11
D
12
D
13
V
14
D
15
D
16
G
17
D
18
P
19
L
20
G
49
–
–
21
O
50
–
–
22
O
51
–
–
23
D
52
–
–
24
D
53
–
–
25
D
54
–
–
26
D
55
–
–
27
G
56
–
–
28
L
29
C
30
O
31
G
32
O
33
O
34
V
35
O
36
O
37
G
38
O
39
O
40
O
41
O
42
G
43
O
44
O
45
V
46
O
47
O
48
D
D
V
D
D
G
D
D
D
D
G
D
D
V
D
D
G
D
P
D
G
49
–
–
O
50
–
–
O
51
–
–
D
52
–
–
D
53
–
–
D
54
–
–
D
55
–
–
G
56
–
–
2002 Mar 01
12
Philips Semiconductors
Application note
Power considerations when using
CMOS and BiCMOS logic devices
AN263
Pin conditions for CPD tests (continued)
Function
16543
16600
16601
16623
16646
16652
16731
16821
16823
16825
16827
16835
Pin Definition
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
L
29
P
30
L
31
G
32
Q
33
D
34
V
35
D
36
D
37
D
38
G
39
D
40
D
41
D
42
D
43
D
44
D
45
G
46
D
47
D
48
D
49
V
50
D
51
D
52
G
53
L
54
L
55
L
56
H
1
H
2
H
3
G
4
O
5
O
6
V
7
O
8
O
9
O
10
G
11
O
12
O
13
O
14
O
15
O
16
O
17
G
18
O
19
O
20
O
21
V
22
O
23
C
24
G
25
H
26
H
27
H
28
L
29
L
30
Q
31
G
32
Q
33
D
34
V
35
D
36
D
37
D
38
G
39
D
40
D
41
D
42
D
43
D
44
D
45
G
46
D
47
D
48
D
1
D
2
H
3
G
4
O
5
O
6
V
7
O
8
O
9
O
10
G
11
O
12
O
13
O
14
O
15
O
16
O
17
G
18
O
19
O
20
D
49
–
O
21
V
50
–
V
22
D
51
–
O
23
D
52
–
C
24
G
53
–
G
25
L
54
–
C
26
L
55
–
P
27
H
56
–
L
28
L
29
L
30
Q
31
G
32
Q
33
D
34
V
35
D
36
D
37
D
38
G
39
D
40
D
41
D
42
D
43
D
44
D
45
G
46
D
47
D
48
D
1
D
2
H
3
G
4
O
5
O
6
V
7
O
8
O
9
O
10
G
11
O
12
O
13
O
14
O
15
O
16
O
17
G
18
O
19
O
20
D
49
–
O
21
V
50
–
V
22
D
51
–
O
23
D
52
–
C
24
G
53
–
G
25
L
54
–
C
26
L
55
–
P
27
H
56
–
L
28
L
29
P
30
D
31
G
32
D
33
D
34
V
35
D
36
D
37
G
38
D
39
D
40
D
41
D
42
G
43
D
44
D
45
V
46
D
47
D
48
O
1
O
2
V
3
O
4
O
5
G
6
O
7
O
8
O
9
O
10
G
11
O
12
O
13
V
14
O
15
O
16
G
17
O
18
C
19
L
20
G
49
–
–
21
D
50
–
–
22
D
51
–
–
23
L
52
–
–
24
L
53
–
–
25
O
54
–
–
26
O
55
–
–
27
G
56
–
–
28
H
29
D
30
P
31
G
32
Q
33
D
34
V
35
D
36
D
37
D
38
G
39
D
40
D
41
D
42
D
43
D
44
D
45
G
46
D
47
D
48
D
49
V
50
D
51
D
52
G
53
L
54
D
55
H
56
L
1
D
2
D
3
G
4
O
5
O
6
V
7
O
8
O
9
O
10
G
11
O
12
O
13
O
14
O
15
O
16
O
17
G
18
O
19
O
20
O
21
V
22
O
23
C
24
G
25
D
26
D
27
L
28
H
29
D
30
P
31
G
32
Q
33
D
34
V
35
D
36
D
37
D
38
G
39
D
40
D
41
D
42
D
43
D
44
D
45
G
46
D
47
D
48
D
49
V
50
D
51
D
52
G
53
L
54
D
55
H
56
H
1
D
2
D
3
G
4
O
5
O
6
V
7
O
8
O
9
O
10
G
11
O
12
O
13
O
14
O
15
O
16
O
17
G
18
O
19
O
20
O
21
V
22
O
23
C
24
G
25
D
26
D
27
H
28
G
29
O
30
O
31
G
32
C
33
C
34
V
35
P
36
D
37
D
38
D
39
L
40
L
41
H
42
D
43
D
44
D
45
D
46
G
47
O
48
O
49
V
50
O
51
O
52
G
53
O
54
O
55
G
56
V
1
O
2
O
3
G
4
O
5
O
6
V
7
O
8
O
9
G
10
O
11
O
12
G
13
O
14
O
15
V
16
O
17
O
18
G
19
O
20
O
21
V
22
O
23
O
24
G
25
O
26
O
27
V
28
L
29
C
30
O
31
G
32
O
33
O
34
V
35
O
36
O
37
O
38
G
39
O
40
O
41
O
42
O
43
O
44
O
45
G
46
O
47
O
48
O
49
V
50
O
51
O
52
G
53
O
54
O
55
L
56
D
1
D
2
D
3
G
4
D
5
D
6
V
7
D
8
D
9
D
10
G
11
D
12
D
13
D
14
D
15
D
16
D
17
G
18
D
19
D
20
D
21
V
22
D
23
D
24
G
25
D
26
Q
27
P
28
H
29
L
30
C
31
G
32
O
33
O
34
V
35
O
36
O
37
O
38
G
39
O
40
O
41
O
42
O
43
O
44
O
45
G
46
O
47
O
48
O
49
V
50
O
51
O
52
G
53
O
54
L
55
H
56
L
1
D
2
D
3
G
4
D
5
D
6
V
7
D
8
D
9
D
10
G
11
D
12
D
13
D
14
D
15
D
16
D
17
G
18
D
19
D
20
D
21
V
22
D
23
D
24
G
25
Q
26
L
27
P
28
L
29
C
30
O
31
G
32
O
33
O
34
V
35
O
36
O
37
O
38
G
39
O
40
O
41
O
42
O
43
O
44
O
45
G
46
O
47
O
48
O
49
V
50
O
51
O
52
G
53
O
54
O
55
L
56
L
1
D
2
D
3
G
4
D
5
D
6
V
7
D
8
D
9
D
10
G
11
D
12
D
13
D
14
D
15
D
16
D
17
G
18
D
19
D
20
D
21
V
22
D
23
D
24
G
25
D
26
P
27
L
28
L
29
C
30
O
31
G
32
O
33
O
34
V
35
O
36
O
37
O
38
G
39
O
40
O
41
O
42
O
43
O
44
O
45
G
46
O
47
O
48
O
49
V
50
O
51
O
52
G
53
O
54
O
55
L
56
L
1
D
2
D
3
G
4
D
5
D
6
V
7
D
8
D
9
D
10
G
11
D
12
D
13
D
14
D
15
D
16
D
17
G
18
D
19
D
20
D
21
V
22
D
23
D
24
G
25
D
26
P
27
L
28
D
29
D
30
C
31
G
32
O
33
O
34
V
35
O
36
O
37
O
38
G
39
O
40
O
41
O
42
O
43
O
44
O
45
G
46
O
47
O
48
O
49
V
50
O
51
O
52
G
53
O
54
L
55
L
56
G
P
D
G
D
D
V
D
D
D
G
D
D
D
D
D
D
G
D
D
D
V
D
D
G
Q
D
G
2002 Mar 01
13
Philips Semiconductors
Application note
Power considerations when using
CMOS and BiCMOS logic devices
AN263
Pin conditions for CPD tests (continued)
Function
16841
16843
16899
16952
164245
Pin Definition
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
L
29
C
30
O
31
G
32
O
33
O
34
V
35
O
36
O
37
O
38
G
39
O
40
O
41
O
42
O
43
O
44
O
45
G
46
O
47
O
48
O
49
V
50
O
51
O
52
G
53
O
54
O
55
L
56
H
1
D
2
D
3
G
4
D
5
D
6
V
7
D
8
D
9
D
10
G
11
D
12
D
13
D
14
D
15
D
16
D
17
G
18
D
19
D
20
D
21
V
22
D
23
D
24
G
25
D
26
P
27
H
28
H
29
L
30
C
31
G
32
O
33
O
34
V
35
O
36
O
37
O
38
G
39
O
40
O
41
O
42
O
43
O
44
O
45
G
46
O
47
O
48
O
49
V
50
O
51
O
52
G
53
O
54
L
55
H
56
H
1
H
2
D
3
G
4
D
5
D
6
V
7
D
8
D
9
D
10
G
11
D
12
D
13
D
14
D
15
D
16
D
17
G
18
D
19
D
20
D
21
V
22
D
23
D
24
G
25
P
26
H
27
H
28
D
29
L
30
C
31
G
32
O
33
O
34
O
35
O
36
V
37
O
38
O
39
O
40
D
41
D
42
G
43
D
44
D
45
O
46
O
47
O
48
V
49
O
50
O
51
O
52
O
53
G
54
O
55
P
56
H
1
D
2
G
3
D
4
D
5
D
6
D
7
V
8
D
9
D
10
D
11
D
12
D
13
G
14
D
15
D
16
D
17
D
18
D
19
V
20
D
21
D
22
D
23
D
24
G
25
Q
26
H
27
L
28
L
29
P
30
L
31
G
32
Q
33
D
34
V
35
D
36
D
37
D
38
G
39
D
40
D
41
D
42
D
43
D
44
D
45
G
46
D
47
D
48
D
49
V
50
D
51
D
52
G
53
L
54
D
55
L
56
H
1
D
2
H
3
G
4
O
5
O
6
V
7
O
8
O
9
O
10
G
11
O
12
O
13
O
14
O
15
O
16
O
17
G
18
O
19
O
20
O
21
V
22
O
23
C
24
G
25
H
26
D
27
H
28
H
29
C
30
O
31
G
32
O
33
O
34
V1
35
O
36
O
37
G
38
O
39
O
40
O
41
O
42
G
43
O
44
O
45
V1
46
O
47
O
48
D
D
V2
D
D
G
D
D
D
D
G
D
D
V2
D
D
G
D
P
L
G
49
–
–
O
50
–
–
O
51
–
–
H
52
–
–
L
53
–
–
D
54
–
–
D
55
–
–
G
56
–
–
NOTE:
For 32-bit devices, the CPD set-up of control pins is identical to those of the 16-bit equivalent. The extra inputs are
set as D, the extra outputs as O.
KEY
V = VCC (in the case of level translators V1 = 5.5 V, V2 = 3.6 V)
G = ground
H = logic 1 (VCC)
L = logic 0 (ground)
D = don’t care (input either H or L but not switching)
C = 50 pF load to ground
O = an open pin (50 pF to ground is allowed)
P = input pulse (see Figure 4)
Q = half frequency pulse (see Figure 4)
R = 1 kΩ pull-up resistor to an additional supply (not VCC)
B = both R and C
VCC
P
GND
VCC
Q
GND
SW01044
Figure 4.
2002 Mar 01
14
Philips Semiconductors
Application note
Power considerations when using
CMOS and BiCMOS logic devices
AN263
NOTES
2002 Mar 01
15
Philips Semiconductors
Application note
Power considerations when using
CMOS and BiCMOS logic devices
AN263
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.
 Koninklijke Philips Electronics N.V. 2002
All rights reserved. Printed in U.S.A.
Contact information
For additional information please visit
http://www.semiconductors.philips.com.
Fax: +31 40 27 24825
Date of release: 03-02
For sales offices addresses send e-mail to:
[email protected].
Document order number:
2002 Mar 01
16
9397 750 09511