74HCT7046AD-T NXP Semiconductors, 74HCT7046AD-T Datasheet - Page 28

• Manufacturer Part Number: 74HCT7046AD-T
• Description: Phase Locked Loops (PLL) PHASED-LOCKED LOOP W/LOCK DTCT
• Manufacturer: NXP Semiconductors
• Type: PLLr

Specifications of 74HCT7046AD-T

• Number Of Circuits: 1
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 5 V
• Package / Case: SO-16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 74HCT7046AD,118

Philips Semiconductors
December 1990
SUBJECT
VCO frequency
with extra
offset
Phase-locked-loop with lock detector
PHASE
COMPARATOR
PC1, PC2
PC1, PC2
DESIGN CONSIDERATIONS
VCO frequency characteristic
With R1 and R2 within the ranges 3 k
the characteristics of the VCO operation will be as shown in Fig. 24.
Selection of R1, R2 and C1
Given f
Calculate f
Obtain the values of C1 and R2 by using Fig.28.
Calculate the value of R1 from the value of C1 and the product R1C1.
0
Fig. 24 Frequency characteristic of VCO operating with offset:
and f
off
from the equation f
f
L
o
, determine the value of product R1C1 by using Fig.29.
= centre frequency; 2f
28
off
= f
o
L
= frequency lock range.
1.6f
R1 300 k
L
.
74HC/HCT7046A
3 k
Product specification
R2
300 k ,