74hct4046a NXP Semiconductors, 74hct4046a Datasheet - Page 29

• 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 R2 can be easily calculated because a constant R2C1 product will produce almost the same VCO output frequency.
Fig.30 Typical value of frequency offset as a function of C1: R1 = ; V
29
VCOIN
= 1/2 V
CC
; INH = GND; T
74HC/HCT4046A
Product specification
amb
= 25 C.