BU3087FV-E Datasheet, PDF (18/26 Pages) Rohm – Built in VCXO,Spread-Spectrum Clock Generator

BU3087FV
Datasheet
●Application Information
Basically, mount ICs to the printed circuit board for use.
(If the ICs are not mounted to the printed circuit board, the characteristics of ICs may not be fully demonstrated.)
Mount 0.1µF capacitors in the vicinity of the IC Pins between 2Pin_AVDD1, 3Pin_AVSS1, and 5Pin_AVDD2,
6Pin_AVSS2, and 12Pin_VSS, 13Pin_VDD respectively.
To obtain accurate frequency, confirm the Crystal-matching with the last board to get rid of a problem
by a mass-production.
Depending on the conditions of the printed circuit board, mount an additional electrolytic capacitor between the power
supply and GND terminal.
For EMI protection, it is effective to put ferrite beads in the origin of power supply to be fed to BU3087FV from the
printed circuit board or to insert a capacitor (of 1Ω or less), which bypasses high frequency desired, between the power
supply and the GND terminal.
For ICs with more than one power supply, it is possible that rush current may flow instantaneously due to the internal
powering sequence and delays. Therefore, give special consideration to power coupling capacitance, power wiring,
width of GND wiring, and routing of wiring.
Typical Application Circuit is recommendation, but in order to use, thoroughly check to be sure characteristic.
●Power Dissipation
(SSOP-B16 package)
700
600
500
400
300
200
100
0
0
25
50
75
100
125
AMBIENT TEMPERATURE : Ta [℃]
* 70mm x 70mm x 1.6mm Glass Epoxy Board
Figure 50. Power Dissipation Curve (Pd-Ta Curve)
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TSZ22111・15・001
18/23
TSZ02201-0E3E0J500040-1-2
17.AUG.2012 Rev.001