BU2185F 데이터 시트보기 (PDF) - ROHM Semiconductor
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BU2185F Datasheet PDF : 6 Pages
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Multimedia ICs
Clock generator
BU2185F
This IC generates the different clock used for DVD. Generates clocks for CD use, sound use, and MPEG use.
•Applications
DVD players
•Features
1) By connecting a crystal oscillating element, the dif-
ferent clock signals are generated.
2) Enables selection of the reference clock directly or
with 1 / 2 output.
3) SOP 16-pin package.
4) Single 3.3V power supply.
5) With the standard clock output, an independent 5V
power supply can be applied for a 5V output.
•Block diagram
XTAL1 IN
XTAL1 OUT
XTAL1
OSC
DATA1A
DATA1B
PLL1
CLK2
(27.0000MHz )
CTRL1
CTRL2
SW
H
L
1/2
CLK1
(36.8640MHz)
(18.4320MHz)
XTAL2 IN
XTAL 2OUT
XTAL2
OSC
PLL2
DATA2A
DATA2B
OE
CTRL1
CTRL2
SW
H
L
H
L
L
L
H
H
H
L
H
L
∗ DATA1A = XTAL2 375 / 128 / 4
∗ DATA1B = XTAL2 375 / 64 / 4
∗ DATA2A = XTAL2 147 / 40 / 4
∗ DATA2B = XTAL2 147 / 20 / 4
CLK3
(33.8688MHz)
PLL1
DATA1A
DATA1A
DATA1B
DATA1B
PLL2
DATA2A
DATA2A
DATA2B
DATA2B
1
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