Datasheet

1997 Nov 25 23
Philips Semiconductors Product specification
Phase-locked-loop with VCO 74HC/HCT4046A
Fig.19 Graphs showing VCO frequency (f
VCO
) as a function of the VCO input voltage (V
VCOIN
).
(a) R
1
=3kΩ;
C
1
= 40 pF
(c) R
1
= 300 kΩ;
C
1
=40pF
(d) R
1
= 300 kΩ;
C
1
= 100 nF
(b) R
1
=3kΩ;
C
1
= 100 nF
To obtain optimum temperature stability, C1 must be as small as possible but larger than 100 pF.