74HC4046A Datasheet, PDF (6/34 Pages) NXP Semiconductors – Phase-locked-loop with VCO

Philips Semiconductors
Phase-locked-loop with VCO
Product specification
74HC/HCT4046A
C1
6
7
4
3
C1A C1B VCO _OUT COMP _IN
12 R2
R2
11 R1
R1
VCO
14
SIG _IN
4046A
PHASE
PC1 _{OUT 2}
COMPARATOR
1
PHASE
COMPARATOR
2
PC2 _{OUT 13}
PCPOUT ₁
PHASE
PC3 _{OUT 15}
COMPARATOR
3
INH
DEMOUT VCO _IN
5
10
9
RS
(a)
R3
R4
C2
(a)
Fig.4 Functional diagram.
identical to 4046A
7046A
PHASE
COMPARATOR
2
PC2 _{OUT 13}
LOCK
DETECTOR
C _LD
15
CCLD
(b)
(b)
LD 1
MGA847
1997 Nov 25
Fig.5 Logic diagram.
6