74hct4046a NXP Semiconductors, 74hct4046a Datasheet - Page 28

• Manufacturer Part Number: 74hct4046a
• Description: Phase-locked-loop With Vco
• Manufacturer: NXP Semiconductors

Philips Semiconductors
1997 Nov 25
Phase-locked-loop with VCO
To obtain optimum VCO performance, C1 must be as small as possible but larger than 100 pF.
Interpolation for various values of R1 can be easily calculated because a constant R1C1 product will produce almost the same VCO output frequency.
Fig.29 Typical value of VCO centre frequency (f
T
amb
= 25 C.
o
) as a function of C1: R2 = ; V
28
VCOIN
74HC/HCT4046A
= 1/2 V
Product specification
CC
; INH = GND;