50 Detailed Information

51 SPECIAL EXTERNAL COMPONENTS

Crystals

Part

C5400N

(818) 443-2121

Part

800R-A-1041667-32

Key Specifications

Center Frequency

1041667 MHz

Frequency Stability

(0 C–70 C)

g

20 PPM

Aging

k g

10 PPM

Pullability

either

a

motional

capacitance

of

t

0021

or

a change of at least 100 PPM when

Varactors

Part

DKV6510-71

Key Specifications

Capacitance

52 LAYOUT RECOMMENDATIONS

EXTGND as close to the chip as possible (preferably under

the chip using chip caps) The part should also be bypassed

close to the chip as possible

FLTRs or VCO FLTR circuitry areas to avoid the possibility

of noise due to crosstalk

should be connected to Ground on isolated branches off of

the DGND pin If using a multilayered board with dedicated

that the ceramic resonator OSC FLTRs and the VCO FLTR

circuitries have their own small isolated islands that are con-

nected to the DGND and AGND pins as described above

ing connected through a ferrite bead or a small inductor

on an isolated branches off of the EXTGND pin Connection

to the ground plane should be made only at the EXTGND

pin

TLF10384 – 10

This drawing was done with convenience in mind

FIGURE 5-1 Recommended Layout

11