74HCT4046AN NXP Semiconductors, 74HCT4046AN Datasheet - Page 27
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74HCT4046AN
Manufacturer Part Number
74HCT4046AN
Description
74HCT CMOS, 74HCT4046, DIP16, 5V
Manufacturer
NXP Semiconductors
Datasheet
1.74HCT4046AD.pdf
(34 pages)
Specifications of 74HCT4046AN
Pll Type
VCO
Frequency
21MHz
Supply Voltage Range
4.5V To 5.5V
Digital Ic Case Style
DIP
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
74HCT4046AN
Manufacturer:
MT
Quantity:
238
Part Number:
74HCT4046AN
Manufacturer:
PHILIPS/飞利浦
Quantity:
20 000
Philips Semiconductors
1997 Nov 25
SUBJECT
PLL frequency
PLL locks on
noise rejection at
AC ripple content
capture range
signal input
when PLL is
locked
Phase-locked-loop with VCO
harmonics at
centre frequency
PHASE
COMPARATOR
PC1, PC2 or PC3
PC1 or PC3
PC2
PC1
PC2 or PC3
PC1
PC2
PC3
DESIGN CONSIDERATIONS
Loop filter component selection
A small capture range (2f
yes
no
high
low
f
f
f
r
r
r
(a) 1 = R3 x C2; (b) amplitude characteristic (c) pole-zero diagram
= 2f
= f
= f
(a)
i
i
, small ripple content at
, large ripple content at
Fig.28 Simple loop filter for PLL with offset; R3 + R4
i
Fig. 27 Simple loop filter for PLL without offset; R3 500 .
, large ripple content at
2 = R4 x C2;
3 = (R3 + R4) x C2
= R3 x C2 (b) amplitude characteristic (c) pole-zero diagram
27
c
) is obtained if
DEMOUT
DEMOUT
DEMOUT
= 180
= 0
= 90
2f
c
74HC/HCT4046A
1
-- - 2 f
Product specification
L
500 .