74HCT4046AD,112 NXP Semiconductors, 74HCT4046AD,112 Datasheet - Page 26

• Manufacturer Part Number: 74HCT4046AD,112
• Description: IC PHASE LOCK LOOP W/VCO 16SOIC
• Manufacturer: NXP Semiconductors
• Type: Phase Lock Loop (PLL)r
• Series: 74HCTr

Specifications of 74HCT4046AD,112

• Number Of Circuits: 1
• Package / Case: 16-SOIC (3.9mm Width)
• Pll: Yes
• Input: Clock
• Output: Clock
• Ratio - Input:output: 2:3
• Differential - Input:output: No/No
• Frequency - Max: 19MHz
• Divider/multiplier: No/No
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Frequency-max: 19MHz
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Input Level: CMOS
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 4.5 V to 5.5 V
• Output Level: CMOS
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-1547-5; 74HCT4046AD; 933809570112

Philips Semiconductors
1997 Nov 25
SUBJECT
VCO frequency
PLL conditions
with extra
offset
with no signal at
the SIG
Phase-locked-loop with VCO
IN
input
PHASE
COMPARATOR
PC1, PC2 or PC3
PC1, PC2 or PC3
PC1
PC2
PC3
DESIGN CONSIDERATIONS
VCO frequency characteristic
With R1 and R2 within the ranges 3 k
3 k
shown in Fig.26.
Fig.26 Frequency characteristic of VCO operating with offset:
f
Selection of R1, R2 and C1
Given f
Calculate f
Obtain the values of C1 and R2 by using Fig.30.
Calculate the value of R1 from the value of C1 and the product R1C1.
VCO adjusts to f
VCO adjusts to f
VCO adjusts to f
o
= centre frequency; 2f
R2
o
and f
off
26
300 k , the characteristics of the VCO operation will be as
from the equation f
L
, determine the value of product R1C1 by using Fig.31.
o
o
o
with
with
with
DEMOUT
DEMOUT
DEMOUT
L
= frequency lock range.
= 360 and V
= 90 and V
= 360 and V
off
= f
o
R1
1.6f
74HC/HCT4046A
VCOIN
L
VCOIN
.
VCOIN
300 k ,
= 1/2 V
Product specification
= min. (see Fig.10).
= min. (see Fig.8).
CC
(see Fig.6).