74HC4046AD NXP Semiconductors, 74HC4046AD Datasheet - Page 32
74HC4046AD
Manufacturer Part Number
74HC4046AD
Description
74HC CMOS, SMD, 74HC4046, SOIC16
Manufacturer
NXP Semiconductors
Datasheet
1.74HCT4046AD.pdf
(34 pages)
Specifications of 74HC4046AD
Pll Type
VCO
Frequency
21MHz
Supply Voltage Range
2V To 6V
Digital Ic Case Style
SOIC
No. Of Pins
16
Operating Temperature Range
-40°C To +125°C
Svhc
No SVHC (18-Jun-2010)
Operating
RoHS Compliant
Supply Current
8µA
Rohs Compliant
Yes
Base Number
74
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Company
Part Number
Manufacturer
Quantity
Price
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Part Number:
74HC4046AD
Manufacturer:
PHI
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Part Number:
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Manufacturer:
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Part Number:
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Philips Semiconductors
note
For an extensive description and application example
please refer to application note ordering number
9398 649 90011.
Also available a computer design program for PLL’s
ordering number 9398 961 10061.
Since the output frequency is proportional to the VCO
control voltage, the PLL frequency response can be
observed with an oscilloscope by monitoring pin 9 of the
VCO. The average frequency response, as calculated by
the Laplace method, is found experimentally by smoothing
this voltage at pin 9 with a simple RC filter, whose time
constant is long compared to the phase detector sampling
rate but short compared to the PLL response time.
1997 Nov 25
Phase-locked-loop with VCO
Fig.32 Frequency synthesizer.
32
full pagewidth
Fig.33 Type 2, second order frequency step response.
Fig.34 Frequency compared to the time response.
e / n
e (t)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
= 5.0
1
2
= 2.0
3
4
74HC/HCT4046A
= 0.3
0.5
0.707
1.0
5
Product specification
6
7
MSB740
n t
8
0
0.2
0.4
0.6
0.8
1.0
0.6
0.4
0.2
e / n
e (t)