74hct7046a NXP Semiconductors, 74hct7046a Datasheet - Page 31

• Manufacturer Part Number: 74hct7046a
• Description: Phase-locked-loop With Lock Detector
• Manufacturer: NXP Semiconductors

Philips Semiconductors
APPLICATION INFORMATION
December 1990
Phase-locked-loop with lock detector
(1) To obtain optimum VCO performance, C1 must be as small as possible but larger than 100 pF.
(2) Interpolation for various values of R2 can be easily calculated because a constant R2C2 product will produce
Fig.28 Typical value of frequency offset as a function of C1: R1 = ; V
almost the same VCO output frequency.
31
VCOIN
= 1/2 V
CC
; INH = GND; T
74HC/HCT7046A
Product specification
amb
= 25 C.