Datasheet

74HCT9046A_6 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 06 — 15 September 2009 28 of 43
NXP Semiconductors
74HCT9046A
PLL with band gap controlled VCO
a. Operating without offset; f
0
= center frequency; 2f
L
= frequency lock range.
b. Operating with offset; f
0
= center frequency; 2f
L
= frequency lock range.
Fig 29. Frequency characteristic of VCO
mga938
f
VCO
f
max
f
0
f
min
1.1 V 0.5 V
CC
V
CC
V
CC
−1.1 V
VCO_IN
2f
L
due to
R1,C1
0.6f
L
f
off
f
VCO
f
max
f
0
f
min
1.1 V
VCO_IN
2f
L
due to
R1,C1
due to
R2,C1
mga939
0.5 V
CC
V
CC
V
CC
−1.1 V