BU2185F Datasheet, PDF (1/6 Pages) Rohm – Clock generator

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